Publications by authors named "Kheibar Dashtian"

32 Publications

Molecular Imprinted Poly(2,5-benzimidazole)-Modified VO-CuWO Homotype Heterojunction for Photoelectrochemical Dopamine Sensing.

Anal Chem 2022 05 25;94(18):6781-6790. Epub 2022 Apr 25.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

A photoactive molecularly imprinted poly(2,5-benzimidazole)-modified vanadium dioxide-cupric tungstate (VO-CuWO) as an efficient photosensitive - type-II heterojunction thin film was electrochemically deposited on Ti substrate for the selective and robust photoelectrochemical (PEC) bioanalysis of dopamine (DA). The optical absorption of -VO/-CuWO type-II heterojunction was capably broadened toward the visible region, which permitted superior light-harvesting and robust carriers generation, separation, and transfer processes significantly enhancing the anodic photocurrent, as confirmed by a series of PEC analyses. Findings revealed that the as-prepared label-free MIP-PEC sensor can quantitatively monitor DA in a linear range of 1 nM to 200 μM with a detection limit of 0.15 nM. This MIP-PEC sensor showed robust selectivity under conditions with high concentrations of interfering substances, which can be recovered in the real samples of urine, cocoa chocolate, and diluted yogurt, indicating its promising potential applications in biological and food samples. This work not only featured the use of photoelectrically active MIP/VO-CuWO for PEC detection of DA, but also provided a new horizon for the design and implementation of functional polymers/metal oxides heterojunction materials in the field of PEC sensors and biosensors.
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http://dx.doi.org/10.1021/acs.analchem.2c00485DOI Listing
May 2022

Hydrophilic magnetic molecularly imprinted resin in PVDF membrane for efficient selective removal of dye.

J Environ Manage 2021 Dec 14;300:113707. Epub 2021 Sep 14.

Chemistry Department, Yasouj University, Yasouj, 75918l-74831, Iran.

Selective removal of contaminants from water by membranes is of practical importance for water purification and environmental protection. In the present study, through an in-situ polymerization process, a novel composite of FeO/molecularly imprinted resorcinol -formaldehyde-melamine resin (FeO/MIRFMR) was synthesized. Then, the novel membrane was prepared from a tea filter bag (TFB) as a base substrate which was subsequently coated by a casting solution containing polyvinylidene fluoride (PVDF) matrix, Prunus scoparia gum as a hydrophilic agent and FeO/MIRFMR as selective filler by phase inversion technique. Resorcinol as functional monomers with multiple hydrophilic groups such as -OH, -NH and -NH-, were used for selective removal of Rhodamine B (RhB) as target molecule. The FeO/MIRFMR/PVDF/TFB membranes were characterized by FE-SEM, XRD, FTIR, BET, VSM, water contact angle (WCA) and mechanical analysis. The filtration and adsorption of RhB on the prepared membrane was investigated parameters in a cross-module filtration setup. Casting solution containing 0.01 g of FeO/MIRFMR as optimum value showed good wettability, high water flux (42.5 L/m h), flux recovery ratio (88.9%), RhB removal efficiency (95.8%). The selectivity of 4.9, 3.3, 2.1 and 2.5 was found to be for RhB compared to AB, MG, EB, and TB dye. It seems that the fabricated membrane could be an effective and selective option for wastewater containing pollutants. The high removal efficiency, fouling resistance, good wettability and stability of the fabricated membrane are promising for use in practical water filtration, especially for selective removal of dyes.
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http://dx.doi.org/10.1016/j.jenvman.2021.113707DOI Listing
December 2021

An asymmetric Schiff base-functionalized gold nanoparticle-based colorimetric sensor for Hg ion determination: experimental and DFT studies.

Anal Methods 2021 06 24;13(23):2603-2611. Epub 2021 May 24.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

We report a colorimetric sensor for the detection of Hg ions utilizing surface-modified gold nanoparticles. Gold nanoparticles (GNPs) were synthesized by direct reduction and were subsequently functionalized using Schiff base ligands. Schiff base ligands as electron transfer agents have been frequently used for the determination of heavy metal ions. From the spectroscopic analysis, it was found that the mechanism could be defined as coordination between azomethine nitrogen and the carbonyl oxygen of the ligand with Hg ions. The affinity of Hg ions towards the bidentate Schiff base on the GNPs result from their self-aggregation and investigated to be a powerful asset for the development of Hg ion-selective sensors, which is accompanied by a visible color change from pink to purple or can be detect by UV-Vis spectroscopy. The optimized structures and binding mechanisms were supported with a high correlation and agreement via spectroscopy and DFT calculations. These simple colorimetric tests can be extended for the rapid pre-screening of a wide variety of heavy metal ions for onsite detection and mitigation.
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http://dx.doi.org/10.1039/d1ay00408eDOI Listing
June 2021

A dual surface inorganic molecularly imprinted BiWO-CuO/AgO heterostructure with enhanced activity-selectivity towards the photocatalytic degradation of target contaminantst.

Photochem Photobiol Sci 2020 Jul 27;19(7):943-955. Epub 2020 Oct 27.

Department of Gas and Petroleum, Yasouj University, 75918-74831, Gachsaran, Iran.

In this work, a high-surface-area dual inorganic molecularly imprinted (DIMI) BiWO/CuO/AgO photo-catalyst was developed for the selective photocatalytic degradation of methyl green (MG) and auramine O (AO) dyes as target pollutants. The DIMI-BiWO/CuO/AgO heterojunction was synthesized by a sono-chemically assisted sol-gel method by coating a layer of molecularly imprinted AgO/CuO on the surface of BiWO nanocubes with MG and AO as the templates. This was followed by calcination for the removal of target molecules and annealing for Ag/Cu oxide preparation. This novel photocatalyst was prepared to overcome the challenge of the co-existing non-target molecules, which has limited the photocatalytic degradation performance. The surface DIMI sites could act as surface defects for accelerating the separation of photogenerated holes and electrons, which led to the increased generation of OH radicals. Moreover, the DIMI sites had increased binding affinity toward MG and AO via the formation of multiple H bonds and electrostatic bonds, which were confirmed by FTIR spectroscopy, PL and EIS studies. The surface DIMI sites led to the increased adsorption and improved local concentration of MG and AO on BiWO/CuO/AgO. Consequently, the heterojunction properties of the final DIMI product accelerated the transfer and separation of photogenerated carriers. The high binding affinity of the DIMI sites to MG and AO confirmed the selective recognition, which was tested in the presence of coexisting pollutant dyes. The other characterizations confirmed the successful fabrication and high photocatalytic activity of the high-surface-area DIMI-BiWO/CuO/AgO heterostructured composite. In general, the superior interfacial electronic interactions, high migration efficiency of photoinduced charge carriers, and strong visible light absorption of the prepared photocatalyst resulted in good photocatalytic performance.
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http://dx.doi.org/10.1039/d0pp00008fDOI Listing
July 2020

Application of magnetic nanomaterials in electroanalytical methods: A review.

Talanta 2021 Apr 9;225:121974. Epub 2020 Dec 9.

Faculty of Chemistry, Bu-Ali Sina University, Hamedan, Iran. Electronic address:

Magnetic nanomaterials (MNMs) have gained high attention in different fields of studies due to their ferromagnetic/superparamagnetic properties and their low toxicity and high biocompatibility. MNMs contain magnetic elements such as iron and nickel in metallic, bimetallic, metal oxide, and mixed metal oxide. In electroanalytical methods, MNMs have been applied as sorbents for sample preparation before the electrochemical detection (sorbent role), as the electrode modifier (catalytic role), and the integration of the above two roles (as both sorbent and catalytic agent). In this paper, the application of MNMs in electroanalytical methods have been classified based on the main role of the nanomaterial and discussed separately. Furthermore, catalytic activities of MNMs in electroanalytical methods such as redox electrocatalytic, nanozymes catalytic (peroxidase, catalase activity, oxidase activity, superoxide dismutase activity), catalyst gate, and nanocontainer have been discussed.
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http://dx.doi.org/10.1016/j.talanta.2020.121974DOI Listing
April 2021

Processing Guar Gum into polyester fabric based promising mixed matrix membrane for water treatment.

Carbohydr Polym 2021 Feb 26;254:116806. Epub 2020 Jul 26.

Chemistry Department, Yasouj University, Yasouj, Iran. Electronic address:

A reactive and mechano-chemically stable support was prepared from Ag-nanoparticles decorated polyester fabric which was subsequently coated by a casting solution containing polyvinylidene fluoride matrix, guar gum (GG) exo-polysaccharide hydrophilic agent, and UiO-66 filler. FE-SEM, XRD, FT-IR, water contact angle technique, and mechanical stability tests were applied to characterize the prepared membranes. The water contact angle measurements indicated the hydrophilicity of the prepared membrane which can be attributed to the nature of bio-GG and UiO-66. The prepared membrane was employed for purifying contaminated waters containing N-cetyl-N,N,N-trimethylammonium bromide (CTAB) and congo-red (CR) dye through a cross-module set-up. The central composite design was also exploited to study the effect of operational parameters such as CTAB and CR concentration, pH solution, and pressure on the removal efficiency. Particularly, the bio-based GG/UiO-66 dispersion showed excellent self-healing properties, which enabled an effective pollutant separation ability and facilitated the recyclability/sustainability of the as-prepared membrane.
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http://dx.doi.org/10.1016/j.carbpol.2020.116806DOI Listing
February 2021

FeO-FeMoS: Promise magnetite LDH-based adsorbent for simultaneous removal of Pb (II), Cd (II), and Cu (II) heavy metal ions.

J Hazard Mater 2021 May 17;410:124560. Epub 2020 Nov 17.

Chemistry Department, Yasouj University, Yasouj 75914-35, Iran. Electronic address:

There have always been numerous challenges to designing a cost-effectiveness, reusable and robust adsorbents for simultaneous heavy metal ion remediations from wastewaters. Herein, a novel kind of nanocomposite relying on the synergic impact of magnetic FeO, FeMoS, and magnesium-aluminum layered double hydroxide (MgAl-LDH) using loading the FeMoS on protonated FeO and adhered to the surface of Mg/Al-LDH (FeO/FeMoS/MgAl-LDH). The nanocage structures adsorbent was characterized via FT-IR, XRD, FE-SEM, EDX, and VSM techniques and demonstrated having an efficient adsorption capability to common cationic pollutants (Pb (II), Cd (II) and Cu (II) by batch experiments. Disparate chief parameters affecting adsorption performance, including FeO/FeMoS/MgAl-LDH mass, metal ion concentrations, solution pH, and contact time were considered and optimized through central composite design (CCD) in detail. Its supreme adsorption efficiency toward Pb (II), Cd (II), and Cu (II) accounted for 190.75, 140.50, and 110.25 mg g, respectively, which acquired by the Langmuir model under the parameter set at 60 min contact time, solution pH at 5, 0.03 g the FeO/FeMoS/MgAl-LDH and metal ion concentrations ranging from 10 to 300 mg L. Such enhancement stemmed from the coordinated complexes in the LDH interlayer region and electrostatic attraction between FeO/FeMoS/MgAl-LDH and metal ions. Furthermore, the adsorption conducts were more consistent with the pseudo-second-order model and the Langmuir isotherm model, respectively. Likewise, the features such as the superior regeneration and reusability allow the FeO/FeMoS/MgAl-LDH nanocomposite to constitute as one of the promising materials for heavy metals remediation in wastewater.
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http://dx.doi.org/10.1016/j.jhazmat.2020.124560DOI Listing
May 2021

Ce/Eu redox couple functionalized HKUST-1 MOF insight to sono-photodegradation of malathion.

J Hazard Mater 2021 05 13;409:124478. Epub 2020 Nov 13.

Department of Radiation Sciences, School of Paramedical Sciences, Yasuj University of Medical Sciences, Iran.

The Ce/Eu redox pair-functionalized HKUST-1 MOF, as an innovative environmentally friendly and recyclable sono-photocatalyst, was hydrothermally mixed and fully characterized by XRD, PL, EIS, FE-SEM, EDS, Mott-Schottky, chronoamperometry, and DRS techniques. The obtained chemical and optical characteristics of the n-type Ce/Eu-HKUST-1 MOF showed that the transfer of additional 4f orbital electrons in the Ce/Eu redox pair improves the sono-photocatalytic activity. The performance of Ce/Eu-HKUST-1 MOF for the sono-photodegradation of Malathion (MA) was evaluated in the aqueous media in the simultaneous presence of blue light and ultrasonic irradiation. The optimization of the process was cross-examined using the response surface methodology as a function of the MA concentration (15-35 mg·L), Ce/Eu-HKUST-1 mass (10-30 mg), pH (4-12), and ultrasonic wave irradiation duration (10-30 min). The maximum sono-photocatalytic degradation capacity was found to be 99.99% under the optimum conditions set as 25 mg·L, 20 mg, 8, and 25 min for the concentration of Malathion, photocatalyst mass, pH, and irradiation duration, respectively. These findings were attributed to the suppression of electron-hole pair recombination, increased life-time of charge carriers, enhanced visible light absorption, and prominent proportion of hydroxyl and peroxide radicals formed.
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http://dx.doi.org/10.1016/j.jhazmat.2020.124478DOI Listing
May 2021

L-phenylalanine-imprinted polydopamine-coated CdS/CdSe n-n type II heterojunction as an ultrasensitive photoelectrochemical biosensor for the PKU monitoring.

Biosens Bioelectron 2020 Oct 5;165:112346. Epub 2020 Jun 5.

Chemistry Department, Yasouj University, Yasouj, 75918-74831, Iran. Electronic address:

A simple and highly sensitive photoelectrochemical biosensor towards L-phenylalanine, as a kind of typical essential amino acid and phenylketonuria biomarker was developed on a surface molecular imprinted (MIP) polydopamine-coated CdS/CdSe/Zn heterojunction. Hierarchical marigold flower-like Zn layer decorated by n-type dichalcogenides interfacial heterojunction was successfully designed and synthesized on Ti foil for PEC converter by in situ electrodeposition. A visible-light-driven molecular imprinting film was prepared through the electropolymerization of dopamine in the presence of L-Phe as biomarker. The combination of bio-MIP and photoelectrochemistry overcomes the defects of the PEC method, which is the absence of selectivity, and offers a new PEC sensor with high sensitivity and selectivity based on visible-light-driven heterojunction and biopolymer-enhanced strategy. The unique interfacial between the Zn marigold flower layer as low work function support and CdS/CdSe n-n heterojunction as well as n-type characteristics of polydopamine imprinted by L-Phe biomarker drastically increase the light trapping and absorption in the visible range, and dramatically inhibit the charge carrier recombination, which is crucial for boosting the Bio-PEC activity. Photocatalytic, electrocatalytic and physicochemical properties of the above-mentioned layers were fully characterized. As-prepared PEC biosensor displayed superb performance for the detection of L-Phe biomarker in the optimized condition obtained from central composite design modeling, showing two linear range 0.005-2.5 and 2.5-130 μM and a low detection limit of 0.9 nM. This work suggests that such L-Phe-imprinted polydopamine-coated Zn/CdS/CdSe heterojunction is greatly promising for being applied in photoelectrochemical biosensing with high photo-electron conversion efficiency.
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http://dx.doi.org/10.1016/j.bios.2020.112346DOI Listing
October 2020

Corn derivative mesoporous carbon microspheres supported hydrophilic polydopamine for development of new membrane: Water treatment containing bovine serum albumin.

Chemosphere 2020 Nov 21;259:127440. Epub 2020 Jun 21.

Chemistry Department, Yasouj University, Yasouj, Iran. Electronic address:

A new mixed matrix membrane (MMM) was prepared by incorporating biological mesoporous carbon microspheres (mCMSs) from corn starch polysaccharide-supported hydrophilic polydopamine (PDA), as a mesoporous and large-surface area filler, selective modifier, and pore-forming agent, into polyvinylidene fluoride (PVDF) matrix in presence of polyethylene glycol (PEG) as a hydrophilic agent. The structural parameters of the prepared membranes were characterized via FE-SEM, BET/BJH, XRD, FT-IR, and AFM analyses, sorption experiments, water permeability assessments, porosimetry tests, flux recovery ratio (FRR) evaluations, and contact angle measurements, with the so-called central composite design (CCD) been successfully applied for optimization and investigation of the effects of the operational parameters. The results were then applied to treat double-distilled water containing bovine serum albumin (BSA) utilizing a cross-module set-up. Based on the findings, the content of the mCMS-PDA in the PVDF matrix significantly affected the contact angle, pure water flux (PWF), FRR, and BSA removal. In this respect, the PWF of the PVDF-PEG-mCMS-PDA increased from 10.25 to 27.78 L/m h with increasing the mCMS-PDA content, with the peak FRR (93.84%) of the PVDF-PEG-mCMS-PDA seen at maximum surface hydrophilicity of the membrane.
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http://dx.doi.org/10.1016/j.chemosphere.2020.127440DOI Listing
November 2020

A dual surface inorganic molecularly imprinted BiWO-CuO/AgO heterostructure with enhanced activity-selectivity towards the photocatalytic degradation of target contaminants.

Photochem Photobiol Sci 2020 Jul;19(7):943-955

Department of Gas and Petroleum, Yasouj University, Gachsaran 75918-74831, Iran.

In this work, a high-surface-area dual inorganic molecularly imprinted (DIMI) Bi2WO6/CuO/Ag2O photocatalyst was developed for the selective photocatalytic degradation of methyl green (MG) and auramine O (AO) dyes as target pollutants. The DIMI-Bi2WO6/CuO/Ag2O heterojunction was synthesized by a sonochemically assisted sol-gel method by coating a layer of molecularly imprinted Ag2O/CuO on the surface of Bi2WO6 nanocubes with MG and AO as the templates. This was followed by calcination for the removal of target molecules and annealing for Ag/Cu oxide preparation. This novel photocatalyst was prepared to overcome the challenge of the co-existing non-target molecules, which has limited the photocatalytic degradation performance. The surface DIMI sites could act as surface defects for accelerating the separation of photogenerated holes and electrons, which led to the increased generation of OH radicals. Moreover, the DIMI sites had increased binding affinity toward MG and AO via the formation of multiple H bonds and electrostatic bonds, which were confirmed by FTIR spectroscopy, PL and EIS studies. The surface DIMI sites led to the increased adsorption and improved local concentration of MG and AO on Bi2WO6/CuO/Ag2O. Consequently, the heterojunction properties of the final DIMI product accelerated the transfer and separation of photogenerated carriers. The high binding affinity of the DIMI sites to MG and AO confirmed the selective recognition, which was tested in the presence of coexisting pollutant dyes. The other characterizations confirmed the successful fabrication and high photocatalytic activity of the high-surface-area DIMI-Bi2WO6/CuO/Ag2O heterostructured composite. In general, the superior interfacial electronic interactions, high migration efficiency of photoinduced charge carriers, and strong visible light absorption of the prepared photocatalyst resulted in good photocatalytic performance.
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http://dx.doi.org/10.1039/d0pp00008fDOI Listing
July 2020

A study to assess the knowledge and practice of medical professionals on radiation protection in interventional radiology.

Indian J Radiol Imaging 2020 Jan-Mar;30(1):64-69. Epub 2020 Mar 30.

Department of Chemistry, Yasouj University, Yasouj, Iran.

Objective: Ionizing radiation has been extensively used in medical procedures throughout the world. Such interventional radiological procedures could result in occupational exposure that needs urgent control. Therefore, MPs (medical professionals) should receive education and appropriate training on occupational radiation protection. In this context, the present study is aimed to investigate the MPs' knowledge and practice regarding radiation protection principles during interventional radiological procedures.

Material And Methods: A descriptive questionnaire-based study was carried out among 215 MPs involved in interventional fluoroscopy procedures. The practice of 31 MPs was studied using a checklist based on ALARA principles and ICRP guidelines.

Results: A total of 43.3% and 45.1% answered correctly for knowledge and practice. However, the difference between radiation protection knowledge and practice between the physicians and nurses was statistically significant. The knowledge and practice survey of MPs demonstrated that nurses rarely adhered to radiation-protection measures.

Conclusion: The present study reflects the lack of knowledge and practice concerning radiation protection concepts among the nurses. This deficiency needs to be resolved by periodic practical radiation protection courses in the curriculum of medicine.
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http://dx.doi.org/10.4103/ijri.IJRI_333_19DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7240898PMC
March 2020

New MOF/COF Hybrid as a Robust Adsorbent for Simultaneous Removal of Auramine O and Rhodamine B Dyes.

ACS Omega 2020 Apr 13;5(16):9420-9428. Epub 2020 Apr 13.

Department of Chemistry, Yasouj University, Yasouj 75918-74831, Islamic Republic of Iran.

In this study, by hybridization of zinc-based metal-organic framework-5 (MOF-5) and melamine-terephthaldehyde-based intergrade two-dimensional π-conjugated covalent organic framework (COF), a novel MOF-5/COF (M5C) hybrid material was prepared and characterized by Fourier transform infrared, field emission scanning electron microscopy, X-ray diffraction, and thermogravimetric analysis. MOF-5 has a well-defined cubic structure, and the proposed COF has an orderly and spherical nanosize shape. The prepared MOF-5/COF was applied as an effective adsorbent for rapid and high-efficient simultaneous removal of auramine O (AO) and rhodamine B (RB) cationic dyes via electrostatic, H-bonding, Lewis acid-base interactions, and π-π stacking from aqueous solution. The effect of experimental parameters such as pH, M5C mass, contact time, and AO and RB dyes concentration was investigated for removal efficiency and optimized. The M5C adsorbent showed an adsorption capacity of 17.95 and 16.18 mg/g for AO and RB dyes, respectively, at pH 9.5. The adsorption study of AO and RB dyes by M5C comprises both isotherm and kinetic studies. The equilibrium adsorption data followed by Langmuir isotherm and the adsorption kinetic process were found to be a pseudo-second-order model. The robustness adsorption efficiency of MOF/COF hybrids can be attributed to the formation of amide bonds between COF and MOFs, which improve the stability of the adsorbent.
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http://dx.doi.org/10.1021/acsomega.0c00539DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7191862PMC
April 2020

Electrostatically controlled plasmonic effects of gold nanoparticles with indigo-carmine functionation for rapid and straightforward colorimetric detection of Cu ions.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Apr 3;230:118026. Epub 2020 Jan 3.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran. Electronic address:

A colorimetric sensor is fabricated for effective on-site monitoring of Cu ions content based on the distance-dependent optical properties of gold nanoparticles-polyvinyl alcohol-citrate (Au-NPs-PVA-Cy) which plasmonic effect electrostatically was controlled by PVA-Cy stabilizing indigo-carmine (IC) functionalizing. The surface-modified gold nanoparticles were extremely stable with a strong affinity toward Cu ions. Citrate ion was employed as a cross-linking agent for pairs of Au-NPs-PVA-Cy and IC for stabilizing coordination between Cu ion and IC. The active materials were characterized by UV-Vis, SEM, DLS, XRD, FT-IR, and EDS analyses. The sensor response toward Cu ion was found to be linear in the range of 0.0974 to 3.27 μM with the limit of detection and quantification values of 0.021 and 0.07 μM, respectively. The sensor represents good sensitivity and stability, promisingly suggesting this device for the accurate and repeatable determination of Cu in real water samples. The effect of different foreign ions on the selectivity of the sensor was checked. The sensor has a long shelf life in comparison to other similar colorimetric sensors. Also, it shows a repeatable response with RSD% of 2.02%. Thus, the sensing of Cu ions based on the electrostatically control plasmonic of Au-NPs-PVA-Cy was developed with proper signaling based on the color change from dark blue to light blue as readily seen by the naked eye. Furthermore, the efficient environmental applicability of this simple and rapid determination of the Cu sensor is proved.
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http://dx.doi.org/10.1016/j.saa.2020.118026DOI Listing
April 2020

Colorimetric determination of F, Br and I ions by Ehrlich's bio-reagent oxidation over enzyme mimic like gold nanoparticles: Peroxidase-like activity and multivariate optimization.

Spectrochim Acta A Mol Biomol Spectrosc 2020 Feb 9;226:117606. Epub 2019 Oct 9.

Department of Semiconductors Materials and Energy Research Center (MERC), Tehran, Iran.

Citrate and polyvinyl alcohol capped gold nanoparticles (PVA-GNPs) were synthesized via chemical reduction technique and fully characterized by DLS, SEM, EDS, XRD, UV-Vis and FT-IR analysis. A simple and practical colorimetric sensor based on red-ox reaction of p-dimethylaminobenzaldehyde (DABA) as ehrlich's bio-reagent and Au(III) with HO on PVA-GNPs mimic catalyst with enzyme-like activity, has been fabricated for determination of F, Br and I halide anions. Prepared PVA-GNPs, can simultaneously catalyze the disintegration of HO, that used to reduce Au(III) ions into co-doped Au-NPs and oxidation of p-dimethylaminobenzaldehyde ehrlich's bio-reagent while in the presence of halide ions Au-X complex can be formed and improved sensor selectivity. Halide ions (F, Br and I) effectively diminishes the catalytic activity of GNPs to disintegrate oxygenated water by the interaction among Au and Au and suppressing oxidation of p-dimethylaminobenzaldehyde ehrlich's bio-reagent. In this system which contains PVA-GNPs, HO, p-dimethylaminobenzaldehyde ehrlich's bio-reagent, and Au(III), increasing the halide ions (F, Br and I) concentration show color changes from deep green to red. In view of this rule, in this work, a novel colorimetric technique for sensitive determination of F, Br and I was developed. This method has the detection limits of 2.60 × 10 M, 6.64 × 10 M and 9.93 × 10 M and linear ranges between 1.98 × 10-1.22 × 10 M, 1.99 × 10-2.0 × 10 M and 1.07 × 10- 2.86 × 10 M for F, Br and I, respectively. Assays are highly selective over other ions. They effectively applied to detection of halide ions in real water samples.
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http://dx.doi.org/10.1016/j.saa.2019.117606DOI Listing
February 2020

A BiWO/AgS/ZnS -scheme heterojunction photocatalyst with enhanced visible-light photoactivity towards the degradation of multiple dye pollutants.

RSC Adv 2019 Sep 23;9(52):30100-30111. Epub 2019 Sep 23.

Chemistry Department, Yasouj University Yasouj 75918-74831 Iran +98-74-33223048 +98-74-33223048.

A novel visible-light-driven -scheme heterojunction, BiWO/AgS/ZnS, was synthesized and its photocatalytic activity was evaluated for the treatment of a binary mixture of dyes, and its physicochemical properties were characterized using FT-IR, XRD, DRS and FE-SEM techniques. The BiWO/AgS/ZnS -scheme heterojunctions not only facilitate the charge separation and transfer, but also maintain the redox ability of their components. The superior photocatalytic activity demonstrated by the -scheme BiWO/AgS/ZnS attributes its unique properties such as the rapid generation of electron-hole pairs, slow recombination rate, and narrow bandgap. The performance of the BiWO/AgS/ZnS was evaluated for the simultaneous degradation of methyl green (MG) and auramine-O (AO) dyes, while the influences of the initial MG concentration (4-12 mg L), initial AO concentration (2-6 mg L), pH (3-9), irradiation time (60-120 min) and photocatalyst dosage (0.008-0.016 g L) were investigated through the response surface methodology. The desirability function approach was applied to optimize the process and results revealed that maximum photocatalytic degradation efficiency was obtained at optimum conditions including 6.08 mg L of initial MG concentration, 4.04 mg L of initial AO concentration, 7.25 of pH, 90.58 min of irradiation time and 0.013 g L of photocatalyst dosage. In addition, a possible photocatalytic mechanism of the BiWO/AgS/ZnS heterojunction was proposed based on the photoinduced charge carriers.
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http://dx.doi.org/10.1039/c9ra05372gDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9072109PMC
September 2019

Photo-Sensitive PbSI crystal incorporated polydopamine biointerface coated on nanoporous TiO as an efficient signal-on photoelectrochemical bioassay for ultrasensitive detection of Cr(VI) ions.

Biosens Bioelectron 2019 May 22;132:105-114. Epub 2019 Feb 22.

Department of Semiconductors, Materials and Energy Research Center (MERC), P.O. Box 31787-316, Tehran, Iran. Electronic address:

An ultrasensitive Visible light-triggered photoelectrochemical (PEC) sensor was designed based on ideal photoactive lead sulfoiodide (PbSI) as low band gap crystal, which hydrothermally synthesized rapidly at low temperature (160 °C) in hydrochloride acid media followed by its incorporation into polydopamine as reactive photo-biointerface, through a facile in situ electropolymerization method, coated on nanoporous TiO grown by anodization on Ti foil. The structure of as-prepared samples and their photoelectrochemical properties were fully characterized. This unique photo-sensitive PbSI catalyst-based PEC bioassay was constructed for the detection of low-abundant Cr(VI) ion in real samples. Applying central composite design, individual and mutual interaction effects were evaluated to obtain optimized solution pH, applied potential and radiant light wavelength as operational factors influencing the PEC efficiency for Cr(VI) detection. At optimal condition, the proposed sensor due to effective suppress in electron-hole recombinations showed a very low detection limit of 3.0 nM, over a broad linear concentration range of 0.01-80 μM in addition to high sensitivity versus 1.9 μA/μM Cr(VI). Proposed PEC sensor displayed high selectivity, reproducibility and stability as well as improved excitation conversion efficiency, which make it highly applicable using solar energy. The potential applicability of the designed sensor was evaluated in water, tomato juice and hair color.
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http://dx.doi.org/10.1016/j.bios.2019.02.042DOI Listing
May 2019

Sonochemical incorporated of cytosine in Cu-Hbpdc as an antibacterial agent against standard and clinical strains of Proteus mirabilis with rsbA gene.

Ultrason Sonochem 2018 Jun 19;44:223-230. Epub 2018 Feb 19.

Cellular and Molecular Research Center, Yasuj University of Medical Sciences, Yasuj, IR, Iran; Student Research Committee, Yasuj University of Medical Sciences, Yasuj, Iran.

The cytosine embedded copper based metal-organic framework (Bio-MOF) was synthesized by facile one-step sonochemical method by simply mixing of 4-4, biphenyldicarboxylic, cytosine and copper nitrate (Bio-Cu-Hbpdc-Cy). The prepared bio-MOF was characterized by XRD, FTIR and FE-SEM techniques. The effect of Cu-Hbpdc-Cy on the expression of the rsbA gene was evaluated in the clinical and standard Proteus mirabilis and study of MIC of Cu-Hbpdc-Cy by microdilution against them that have the rsbA gene. According to different concentrations of MIC, MBC concentrations was cultured on blood agar culture medium. Regarding to the concentration of MIC, gene expression changes were obtained by real-time PCR. MIC for standard and clinical strains of Proteus mirabilis was 1.6 and 1.8 mg/ml, and also MBC was obtained to be 1.8 and 2.0 mg/ml, respectively. Finally, in the real time PCR method, expression of the rsbA gene in presences of bio-Cu-Hbpdc-Cy was reduced, but has no effect on the gene expression of the Housekeeping DNA Gyrase-B gene. Considering the effect of Cu-Hbpdc-Cy on the rsbA gene in Proteus mirabilis bacteria, it is possible to use of Cu-Hbpdc-Cy agent as a therapeutic supplement against this bacterium.
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http://dx.doi.org/10.1016/j.ultsonch.2018.02.031DOI Listing
June 2018

A simple approach for the sonochemical loading of Au, Ag and Pd nanoparticle on functionalized MWCNT and subsequent dispersion studies for removal of organic dyes: Artificial neural network and response surface methodology studies.

Ultrason Sonochem 2018 Apr 5;42:422-433. Epub 2017 Dec 5.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

In this study, the artificial neural network (ANN) and response surface methodology (RSM) based on central composite design (CCD) were applied for modeling and optimization of the simultaneous ultrasound-assisted removal of quinoline yellow (QY) and eosin B (EB). The MWCNT-NH and its composites were prepared by sonochemistry method and characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive spectroscopy (EDS) analysis's. Initial dyes concentrations, adsorbent mass, sonication time and pH contribution on QY and EB removal percentage were investigated by CCD and replication of experiments at conditions suggested by model has results which statistically are close to experimented data. The ultrasound irradiation is associated with raising mass transfer of process so that small amount of the adsorbent (0.025 g) is able to remove high percentage (88.00% and 91.00%) of QY and EB, respectively in short time (6.0 min) at pH = 6. Analysis of experimental data by conventional models is good indication of Langmuir efficiency for fitting and explanation of experimented data. The ANN based on the Levenberg-Marquardt algorithm (LMA) combined of linear transfer function at output layer and tangent sigmoid transfer function at hidden layer with 20 hidden neurons supply best operation conditions for good prediction of adsorption data. Accurate and efficient artificial neural network was obtained by changing the number of neurons in the hidden layer, while data was divided into training, test and validation sets which contained 70, 15 and 15% of data points respectively. The Average absolute deviation (AAD)% of a collection of 128 data points for MWCNT-NH and composites is 0.58%.for EB and 0.55 for YQ.
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http://dx.doi.org/10.1016/j.ultsonch.2017.12.003DOI Listing
April 2018

Sonochemical-solvothermal synthesis of guanine embedded copper based metal-organic framework (MOF) and its effect on oprD gene expression in clinical and standard strains of Pseudomonas aeruginosa.

Ultrason Sonochem 2018 Apr 26;42:237-243. Epub 2017 Nov 26.

Department of Molecular Microbiology, Dena Pathobiology Laboratory, Yasouj, Iran; Young Researchers and Elite Club, Yasooj Branch, Islamic Azad University, Yasooj, Iran.

The guanine incropped Cu based metal-organic framework (Guanine-Cu-MOF) was synthesized by facile one-step sonochemical method by simply mixing of 4-4, biphenyldicarboxylic, guanine and copper nitrate (Bio-Cu-Hbpdc-Gu). The prepared guanine-MOF was characterized by using X-Ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and Field emission scanning electron microscopy (FE-SEM) techniques. The morphology of prepared material was sponge-shaped which it was well documented, together with the presence of existing functional groups. The effect of prepared material on oprD Gene Expression was investigated in Clinical and Standard Strains of Pseudomonas aeruginosa (PAO-1) and minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of prepared samples against P. aeruginosa strains were determined through the broth micro-dilution method. The expression of oprD gene in strains affected by Cu-Hbpdc-Gu was quantitatively investigated through real-time PCR. MIC of Bio-Cu-Hbpdc-Gu was 400 μg/mL for the standard and clinical strains of P. aeruginosa, while, MBC of this compound was 700 μg/mL for standard strain and 800 μg/mL for clinical strains. The highest and the lowest rate of oprD gene expression were found to be 3.6 and 1.1 fold in the strains, respectively.
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http://dx.doi.org/10.1016/j.ultsonch.2017.11.035DOI Listing
April 2018

MOF-5(Zn)-FeO nanocomposite based magnetic solid-phase microextraction followed by HPLC-UV for efficient enrichment of colchicine in root of colchicium extracts and plasma samples.

J Chromatogr B Analyt Technol Biomed Life Sci 2017 Nov 29;1067:45-52. Epub 2017 Sep 29.

Department of Agronomy, Faculty of Agriculture, Yasouj University, Yasouj, Iran.

In present work, facile method is developed for determination of colchicine in human plasma sample, autumn and spring root of colchicium extracts by ultrasound assisted dispersive magnetic solid phase microextraction followed by HPLC-UV method (UAD-MSPME-HPLC-UV). Magnetic (FeO-nanoparticles) metal organic framework-5, (MOF-5(Zn)-FeONPs) was synthesized by dispersing MOF-5 and Fe(NO).9HO in ethylene glycol (as capping agent) and NaOH (pH adjustment agent) by hydrothermal method. The prepared sorbent was characterized via XRD and SEM analysis and applied as magnetic solid phase in UAD-MSPME-HPLC-UV method. In this method, colchicine molecules were sorbed on MOF-5(Zn)-FeONPs sorbent by various mechanisms like ion exchange, hydrogen bonding and electrostatic, ᴨ-ᴨ, hard-hard and dipole-ion interaction followed by exposing sonication waves as incremental mass transfer agent and then the sorbent was separated from the sample matrix by an external magnetic fields. Subsequently, accumulated colchicine were eluted by small volume of desorption organic solvent. Influence of operational variables such as MOF-5(Zn)-FeONPs mass, volume of extracting solvent and sonication time on response property (recovery) were studied and optimized by central composite design (CCD) combined with desirability function (DF) approach. Under optimum condition, the method has wide linear calibration rang (0.5-1700ngmL) with reasonable detection limit (0.13ngmL) and R=0.9971. Finally, the UAD-MSPME-HPLC-UV method was successfully applied for determination of colchicine autumn and spring root of colchicium extracts and plasma samples.
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http://dx.doi.org/10.1016/j.jchromb.2017.09.044DOI Listing
November 2017

Sonochemical-assisted synthesis of CuO/CuO/Cu nanoparticles as efficient photocatalyst for simultaneous degradation of pollutant dyes in rotating packed bed reactor: LED illumination and central composite design optimization.

Ultrason Sonochem 2018 Jan 9;40(Pt A):601-610. Epub 2017 Aug 9.

Department of Semiconductors, Materials and Energy Research Center (MERC), Karaj 3177983634, Iran; Department of Physics, Yasouj University, Yasouj 75918-74831, Iran.

CuO/CuO/Cu nanoparticles were prepared by sonochemical combined thermal synthesis method and used as new photocatalyst for simultaneous photocatalytic degradation of safranin O (SO) and methylene blue (MB) dyes in rotating packed bed reactor equipped to blue light emitting diode (LED). The physicochemical properties of the synthesized CuO/CuO/Cu nanoparticles were investigated by XRD, SEM and DRS analysis. The band-gap of the prepared CuO/CuO/Cu-NPs was estimated to be about 1.42eV which is appropriate for photodegradation process under blue light irradiation. In rotating packed bed reactors, two key parameters are very important, one high centrifugal field and other porous media, which intensify mass transfer operation leads to photodegradation improvement. The maximum photodegradation efficiency was obtained at pH of 6 and subsequently the effects of CuO/CuO/Cu-NPs dosage, rotational speed, initial dyes concentration, flow rate and reaction time were studied by central composite design (CCD) and optimized values were found to be 0.3g/L, 900rpm, 10mg/L of both dyes, 0.3L/min and 90min, respectively. Finally, results showed that synergistic effects induced by forming CuO/CuO heterojunction containing Cu-NPs co-cocatalyst greatly accelerate electron transfer and effectively retard the reduction of CuO by photo-generated electrons.
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http://dx.doi.org/10.1016/j.ultsonch.2017.08.007DOI Listing
January 2018

Ultrasound assisted extraction of phenolic acids from broccoli vegetable and using sonochemistry for preparation of MOF-5 nanocubes: Comparative study based on micro-dilution broth and plate count method for synergism antibacterial effect.

Ultrason Sonochem 2018 Jan 6;40(Pt A):1031-1038. Epub 2017 Sep 6.

Social Determinants of Health Research Centre, Yasuj University of Medical Sciences, Yasuj, Iran.

The aim of this work was comparison study of dilution and plating method for evaluation of the synergism effect of metal-organic framework nanocubes (MOF-5-NCs) and broccoli extract (Brassica oleracea) on antibacterial activity of standard and clinical Pseudomonas aeruginosa strains. For this purpose, sonochemical synthesis of MOF-5-NCs was performed and it was characterized using XRD, FT-IR, FESEM and EDS techniques. Maceration extraction (ME) and ultrasound assisted extraction (UAE) methods in three different solvents were prepared and applicability of their extracts were compared in some cases such as radical scavenging and antioxidant activity. The HPLC/UV analysis was applied for separation, identification and evaluation of phenolic acids in prepared broccoli extracts. Then, antimicrobial activity of MOF-5NCs and broccoli extract against gram-negative bacteria, Pseudomonas aeruginosa was evaluated by detection of minimal inhibition concentration (MIC), minimal bactericidal concentration (MBC) and zone of inhibition (ZOI). The results of in vitro assays showed that dilution method due to flase estimation of 4% viability percentage which is not logic by consideration of MBC well could not be able to estimate MBC. Therefore, plate count method was performed for precise calculation of MBC. MIC of broccoli extract and MOF-5-NCs on Pseudomonas aeruginosa strains were 7.81mgmL and 3.13mgmL, respectively.
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http://dx.doi.org/10.1016/j.ultsonch.2017.09.001DOI Listing
January 2018

Design of a new technique based on combination of ultrasound waves via magnetite solid phase and cloud point microextraction for determination of Cr(III) ions.

Ultrason Sonochem 2017 Nov 10;39:798-809. Epub 2017 Jun 10.

Department of Chemistry, Yasouj University, Yasouj 75918-74831, Iran.

In this work, we focused on development of a new techniques by coupling of ultrasound irradiation, cloud point method and magnetite solid phase microextraction for the extraction and preconcentration of Cr(III) ions from aqueous solutions. In order to reduce cost and improve practicability of proposed process a new efficient and regenerable magnetite sorbent (functionalized chitosan grafted-amino graphene oxide (GO) decorated by zinc ferrite nanoparticles (CS-GO-Zn: FeO)) was synthesized through hydrothermal method and then characterized by FT-IR, FE-SEM, EDS and XRD analysis. Effect of initial sample volume and type, volume and concentration of eluent on the ER% were investigated and optimized using one at a time method. Correlation between the main and interaction effects of other operational parameters such as Cr(III) ion concentration, CS-GO-Zn: FeO mass, sonication time, pH and solution temperature on the ER% were investigated and optimized by central composite design coupled with desirability function approach. The results revealed that there were significant effects for most investigated terms on the ER% and maximum ER% of 88.09% was obtained in desirability value of 1.0. This maximum efficiency was obtained at 0.035µg/mL Cr(III) ion concentration, 40.16°C temperature, 0.016g of CS-GO-Zn: FeO, pH 6.36 and 9.20min sonication time. In addition, under the optimal conditions the linear range, limit of detection, enrichment factor and relative standard deviation were found to be 0.02-4.4µg/mL, 0.002µg/mL, 23.23 and 1.68% respectively. Finally, the method was successfully applied to the separation and preconcentration of Cr(III) ion from tap, river and mineral waters.
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http://dx.doi.org/10.1016/j.ultsonch.2017.06.006DOI Listing
November 2017

Rapid and high-capacity ultrasonic assisted adsorption of ternary toxic anionic dyes onto MOF-5-activated carbon: Artificial neural networks, partial least squares, desirability function and isotherm and kinetic study.

Ultrason Sonochem 2017 Jul 1;37:71-82. Epub 2016 Nov 1.

Department of Gas and Petroleum, Yasouj University, Gachsaran 75918-74831, Iran.

The present paper focused on the ultrasonic assisted simultaneous removal of fast green (FG), eosin Y (EY) and quinine yellow (QY) from aqueous media following using MOF-5 as a metal organic framework and activated carbon hybrid (AC-MOF-5). The structure and morphology of AC-MOF-5 was identified by SEM, FTIR and XRD analysis. The interactive and main effects of variables such as pH, initial dyes concentration (mgL), adsorbent dosage (mg) and sonication time (min) on removal percentage were studied by central composite design (CCD), subsequent desirability function (DF) permit to achieved real variable experimental condition. Optimized values were found 7.06, 5.68, 7.59 and 5.04mgL, 0.02g and 2.55min for pH, FG, EY and QY concentration, adsorbent dosage and sonication time, respectively. Under this conditions removal percentage were obtained 98.1%, 98.1% and 91.91% for FG, EY and QY, respectively. Two models, namely partial least squares (PLS) and multi-layer artificial neural network (ANN) model were used for building up to construct an empirical model to predict the dyes under study removal behavior. The obtained results show that ANN and PLS model is a powerful tool for prediction of under-study dyes adsorption by AC-MOF-5. The evaluation and estimation of equilibrium data from traditional isotherm models display that the Langmuir model indicated the best fit to the equilibrium data with maximum adsorption capacity of 21.230, 20.242 and 18.621mgg, for FG, EY and QY, respectively, while the adsorption rate efficiently follows the pseudo-second-order model.
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http://dx.doi.org/10.1016/j.ultsonch.2016.10.029DOI Listing
July 2017

Simultaneous removal of Cd(II), Ni(II), Pb(II) and Cu(II) ions via their complexation with HBANSA based on a combined ultrasound-assisted and cloud point adsorption method using CSG-BiPO/FePO as novel adsorbent: FAAS detection and optimization process.

J Colloid Interface Sci 2017 Aug 18;500:241-252. Epub 2017 Mar 18.

Young Researchers and Elite Club, Marvdasht Branch, Islamic Azad University, Marvdasht, Iran.

Ultrasound irradiation, cloud point and adsorption methods were coupled to develop a new technique for the simultaneous removal of Cd(II), Ni(II), Pb(II) and Cu(II) ions after their complexation with (E)-4-((2-hydroxybenzylidene) amino) naphthalene-1-sulfonic acid (HBANSA). In order to reduce cost and improve practicability of process, chitosan gel (CSG) composited with bismuth(III) phosphate/iron(III) phosphate nanoparticles (CSG-BiPO/FePO) were hydrothermally synthesized followed by their characterization using FE-SEM, EDS and XRD analysis. The operational parameters such as metal ions concentration, CSG-BiPO/FePO mass, sonication time and temperature were investigated and optimized using central composite design (CCD). In addition, the possible significant correlation between these variables and removal efficiency was studied from which the maximum efficiencies were obtained at 5.57mg/L, 51.49°C, 0.018g and 10.73min corresponding to metal ions concentration, temperature, CSG-BiPO/FePO and sonication time, respectively. Moreover, at these conditions, the removal percentages of the Cd(II), Ni(II), Pb(II) and Cu(II) ions were found to be 96.24, 93.73, 95.55 and 97.47, respectively. After applying various isotherms, the Langmuir isotherm model was found to be most appropriate model for describing and fitting the experimental equilibrium data and thus maximum mono-layer adsorption capacities of 8.61, 8.54, 8.65 and 8.62mgg were obtained for Cd(II), Pb(II), Cu(II) and Ni(II) ions, respectively. The study of kinetics showed well applicability of pseudo second order kinetic model with maximum mass transfer rate in adsorption process.
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http://dx.doi.org/10.1016/j.jcis.2017.03.070DOI Listing
August 2017

Chitosan extraction from lobster shells and its grafted with functionalized MWCNT for simultaneous removal of Pb ions and eriochrome cyanine R dye after their complexation.

Int J Biol Macromol 2017 Sep 8;102:181-191. Epub 2017 Mar 8.

Department of Chemical Engineering, Curtin University, G.P.O. Box U1987, Perth, Western Australia 6845, Australia.

Chitosan (CS) extracted from lobster shells (Persian Gulf, Iran), was grafted with amino functionalized multiwalled carbon nanotube (MWCNT). This novel material was characterized by FE-SEM and FT-IR and used for the ultrasound-assisted removal of Pb ions and eriochrome cyanine R (ECR) dye. A central composite design (SCCD) under response surface methodology was used for studying the influences of important variables in removal process such as initial ECR and Pb ions concentrations, adsorbent mass and sonication time on the removal efficiency. Linear, 2FI, quadratic and cubic models were performed and a quadratic model was selected for analysis of each response. ANOVA for the quadratic model shows the F-value parameter (820.44 and 537.12 for ECR and Pb ions removal, respectively) and very low p-value (<0.0001), implying that the model was highly significant for understudy analytes adsorption. To achieve maximum removal, the optimum condition was determined and were set as:19.34 and 18.20mgL,0.018g and 9.35min for initial ECR and Pb ion concentrations, adsorbent mass and sonication time, respectively. At these optimum conditions, 97.06% of ECR and 99.29% of Pb ions were removed in a short time.
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http://dx.doi.org/10.1016/j.ijbiomac.2017.03.035DOI Listing
September 2017

Synthesis and characterization of functionalized mesoprous SBA-15 decorated with Fe(3)O(4) nanoparticles for removal of Ce(III) ions from aqueous solution: ICP-OES detection and central composite design optimization.

J Colloid Interface Sci 2017 05 24;494:114-123. Epub 2017 Jan 24.

Research Laboratory of Spectrometry & Micro and Nano Extraction, Department of Chemistry, Iran University of Science and Technology, Tehran, Iran. Electronic address:

A selective adsorbent based on the modification of mesoprous SBA-15 with N,N'-bis(salicylidene)-1,3-ethylenediamine Schiff base and decorated with FeO nanoparticles (SBA-15-BSEA-FeO-NPs) for Ce(III) ions removal was reported. The SBA-15-BSEA-FeO-NPs was identified by XRD, FE-SEM, TEM, SEM, FT-IR, VSM, BET and BJH analysis. Central composite design (CCD) was applied to evaluate the main and interactive effects of adsorption variables and optimize the operational parameters. The important variable such as initial pH solution, SBA-15-BSEA-FeO-NPs mass, shaking time and initial concentration of Ce ions were studied under batch mode. In desirability concession of 1.0 as optimum value for R% , the level of factors was as follows: shaking time 80min, SBA-15-BSEA-FeO-NPs mass 0.05g, pH 5 and initial concentration of Ce(III) ions 40mgL. The SBA-15-BSEA-FeO-NPs exhibited high adsorption efficiency and very good selectivity through cerium removal even in the presence of other ions (La, Nb, Er, Cu, Cd, Cr, and Fe ions). The SBA-15-BSEA-FeO-NPs was successfully regenerated and the response was reversible. The R.S.D. of the adsorption process was less than 1.02%.
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http://dx.doi.org/10.1016/j.jcis.2017.01.072DOI Listing
May 2017

Ultrasound assisted combined molecularly imprinted polymer for selective extraction of nicotinamide in human urine and milk samples: Spectrophotometric determination and optimization study.

Ultrason Sonochem 2017 01 16;34:640-650. Epub 2016 Jun 16.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

Ultrasound-assisted dispersive solid phase microextraction followed by UV-vis spectrophotometer (UA-DSPME-UV-vis) was designed for extraction and preconcentration of nicotinamide (vitamin B) by HKUST-1 metal organic framework (MOF) based molecularly imprinted polymer (MIP). This new material was characterized by FTIR and FE-SEM techniques. The preliminary Plackett-Burman design was used for screening and subsequently the central composite design justifies significant terms and possible construction of mathematical equation which give the individual and cooperative contribution of variables like HKUST-1-MOF-NA-MIP mass, sonication time, temperature, eluent volume, pH and vortex time. Accordingly the optimum condition was set as: 2.0mg HKUST-1-MOF-NA-MIP, 200μL eluent and 5.0min sonication time in center points other variables were determined as the best conditions to reach the maximum recovery of the analyte. The UA-DSPME-UV-vis method performances like excellent linearity (LR), limits of detection (LOD), limits of quantification of 10-5000μgL with R of 0.99, LOD (1.96ngmL), LOQ (6.53μgL), respectively show successful and accurate applicability of the present method for monitoring analytes with within- and between-day precision of 0.96-3.38%. The average absolute recoveries of the nicotinamide extracted from the urine, milk and water samples were 95.85-101.27%.
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http://dx.doi.org/10.1016/j.ultsonch.2016.06.018DOI Listing
January 2017

Rapid ultrasound-assisted magnetic microextraction of gallic acid from urine, plasma and water samples by HKUST-1-MOF-FeO-GA-MIP-NPs: UV-vis detection and optimization study.

Ultrason Sonochem 2017 01 23;34:561-570. Epub 2016 Jun 23.

Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.

Magnetite (FeO nanoparticles (NPs)) HKUST-1 metal organic framework (MOF) composite as a support was used for surface imprinting of gallic acid imprinted polymer (HKUST-1-MOF-FeO-GA-MIP) using vinyltrimethoxysilane (VTMOS) as the cross-linker. Subsequently, HKUST-1-MOF-FeO-NPs-GA-MIP characterized by FT-IR, XRD and FE-SEM analysis and applied for fast and selective and sensitive ultrasound assisted dispersive magnetic solid phase microextraction of gallic acid (GA) by UV-Vis (UA-DMSPME-UV-Vis) detection method. Plackett-Burman design (PBD) and central composite design (CCD) according to desirability function (DF) indicate the significant variables among the extraction factors vortex (mixing) time (min), sonication time (min), temperature (°C), eluent volume (L), pH and HKUST-1-MOF-FeO-NPs-GA-MIP mass (mg) and their contribution on the response. Optimum conditions and values correspond to pH, HKUST-1-MOF-FeO-NPs-GA-MIP mass, sonication time and the eluent volume were set as follow 3.0, 1.6mg, 4.0min and 180μL, respectively. The average recovery (ER%) of GA was 98.13% with desirability of 0.997, while the present method has best operational performance like wide linear range 8-6000ngmL with a Limit of detection (LOD) of 1.377ngmL, limit of quantification (LOQ) 4.591ngmL and precision (<3.50% RSD). The recovery of GA in urine, human plasma and water samples within the range of 92.3-100.6% that strongly support high applicability of present method for real samples analysis, which candidate this method as promise for further application.
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http://dx.doi.org/10.1016/j.ultsonch.2016.06.033DOI Listing
January 2017
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