710 results match your criteria zno titanium


Boosting light-driven CO reduction towards solar fuels: Mainstream avenues for engineering ZnO-based photocatalysts.

Environ Res 2021 Apr 6:111134. Epub 2021 Apr 6.

Faculty of Biotechnology, Binh Duong University, Thu Dau Mot, Vietnam. Electronic address:

The realization of artificial photosynthesis in the photocatalytic CO transformation into valuable chemicals or solar fuels (such as CO, CH, HCOOH, and CHOH) by solar-light harvesting is a promising solution to both global-warming and energy-supply issues. Recently, zinc oxide (ZnO) has emerged as an excellent oxidative photocatalyst among non-titanium metal oxide due to its availability, outstanding semiconducting and optical properties, non-toxicity, affordability, and ease of synthesis. However, its wide bandgap and inability to absorb in the visible region has demanded particular modification for its practical use as a sustainable photocatalyst. Read More

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In-Depth Comparative Study of Cathode Interfacial Layer for Stable Inverted Perovskite Solar Cell.

ChemSusChem 2021 Apr 7. Epub 2021 Apr 7.

Max-Planck-Institut für Kohlenforschung, Heterogeneous Catalysis, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, GERMANY.

Achieving long-term device stability is one of the most challenging issues that impede the commercialization of perovskite solar cells (PSCs). Recent studies have emphasized the significant role of the cathode interfacial layer (CIL) in determining the stability of inverted p-i-n PSCs. However, experimental investigations focusing on the influence of CIL to PSC degradation has not yet been systematically explored. Read More

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The Role of Metal Oxide Nanoparticles, , and on Small Intestinal Enzyme Activity.

Environ Sci Nano 2020 Dec 9;7(12):3940-3964. Epub 2020 Nov 9.

Department of Biomedical Engineering, Binghamton University, Binghamton, NY, 13902, USA.

Engineered nanomaterials (ENMs) have become common in the food industry, which motivates the need to evaluate ENM effects on human health. Gastrointestinal (GI) models (e.g. Read More

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December 2020

Imaging of Neurotransmitters and Small Molecules in Brain Tissues Using Laser Desorption/Ionization Mass Spectrometry Assisted with Zinc Oxide Nanoparticles.

J Am Soc Mass Spectrom 2021 Apr 30;32(4):1065-1079. Epub 2021 Mar 30.

London Research and Development Center, Agriculture and Agri-Food Canada, London, ON N5 V 4T3, Canada.

Inorganic nanostructured materials such as silicon, carbon, metals, and metal oxides have been explored as matrices of low-background signals to assist the laser desorption/ionization (LDI) mass spectrometric (MS) analysis of small molecules, but their applications for imaging of small molecules in biological tissues remain limited in the literature. Titanium dioxide is one of the known nanoparticles (NP) that can effectively assist LDI MS imaging of low molecular weight molecules (LMWM). TiO NP is commercially available as dispersions, which can be applied using a chemical solution sprayer. Read More

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Effects of TiO and ZnO nanoparticles on vermicomposting of dewatered sludge: studies based on the humification and microbial profiles of vermicompost.

Authors:
Xia Hui Huang Kui

Environ Sci Pollut Res Int 2021 Mar 19. Epub 2021 Mar 19.

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China.

Nanoparticles (NPs) are prevalent in dewatered sludge, and their presence increases the environmental risks associated with the subsequent sludge treatment process. However, until now, their potential effects on sludge vermicomposting have not been clarified. This study investigated the effects of NPs on sludge humification and microbial profiles during vermicomposting by comparing fresh dewatered sludge substrates with substrates mixed with 0 mg/kg NPs (control), 100 mg/kg TiO, 500 mg/kg TiO, 100 mg/kg ZnO, and 500 mg/kg ZnO. Read More

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Effect of NaO and ZnO on the microstructure and properties of laser cladding derived CaO-SiO ceramic coatings on titanium alloys.

J Colloid Interface Sci 2021 Jun 23;592:498-508. Epub 2021 Feb 23.

Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education) and Shandong Engineering Research Center for Superhard Material, Department of Materials Science and Engineering, Shandong University, Jinan 250061, China. Electronic address:

To improve the bioactivity of titanium alloy (Ti-6Al-4V), CaO-SiO coatings on titanium alloys were fabricated using laser cladding method. The effect of NaO and ZnO on the microstructure and properties of the prepared coatings was discussed. The microstructure of the CaO-SiO coatings consists of cellular grains and cellular dendrites. Read More

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Sunscreens and their usefulness: have we made any progress in the last two decades?

Authors:
Nick Serpone

Photochem Photobiol Sci 2021 Feb 18;20(2):189-244. Epub 2021 Feb 18.

Dipartimento di Chimica, Universita degli Studi di Pavia, Via Taramelli 12, Pavia, 27100, QC, Italy.

Sunscreens have now been around for decades to mitigate the Sun's damaging ultraviolet (UV) radiation which, although essential for the existence of life, is a recognized prime carcinogen. Accordingly, have suncreams achieved their intended purposes towards protection against sunburns, skin photo-ageing and the like? Most importantly, however, have they provided the expected protection against skin cancers that current sunscreen products claim to do? In the last two decades, there have been tens, if not hundreds of studies on sunscreens with respect to skin protection against UVB (280‒320 nm)-traditionally sunscreens with rather low sun protection factors (SPF) were intended to protect against this type of radiation-and UVA (320‒400 nm) radiation; a distinction between SPF and UVA protection factor (UVA-PF) is made. Many of the studies of the last two decades have focused on protection against the more skin-penetrating UVA radiation. Read More

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February 2021

Photoprotective activity of zirconia nanoparticles.

Colloids Surf B Biointerfaces 2021 Feb 18;202:111636. Epub 2021 Feb 18.

Laboratory of Nanomaterials and Nanotoxicology, Institute of Science and Technology, Federal University of São Paulo, SP, Brazil. Electronic address:

The increasing incidence of diseases caused by the harmful effects of UV radiation in skin, predominantly skin cancer, induce the search for more efficient photoprotector agents. Nowadays, titanium dioxide (TiO) and zinc oxide (ZnO) are the most widely used photoprotectors and therefore form the main components of commercially available sunscreens. Although the outstanding efficiency in absorbing and scattering UV radiation, mainly as nanoparticles, recent studies have raised concerns regarding the safe use of these nanoparticles, especially due to their high generation of reactive oxygen species (ROS). Read More

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February 2021

VPS34 regulates dynamin to determine the endocytosis of mitochondria-targeted zinc oxide nanoparticles in human osteosarcoma cells.

J Mater Chem B 2021 Mar 8;9(11):2641-2655. Epub 2021 Mar 8.

Department of Orthopedics, Beijing International Cooperation Base for Science and Technology on Biomimetic Titanium Orthopedic Implants, Peking University Third Hospital, Beijing 100191, China.

In our previous study, zinc oxide nanoparticles (ZnO NPs) presented satisfying therapeutic effects with cancer cell selectivity in osteosarcoma cells and, thus, have been considered as a potential nanomedicine for human osteosarcoma treatment. However, the poorly investigated internalization process, including their endocytic pathway into tumor cells and intracellular fate, limits the clinical application. Here, we further clarified these aspects. Read More

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Efficacy of metal oxide nanoparticles as novel antimicrobial agents against multi-drug and multi-virulent Staphylococcus aureus isolates from retail raw chicken meat and giblets.

Int J Food Microbiol 2021 Apr 24;344:109116. Epub 2021 Feb 24.

Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt; Department of Biology, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia.

Staphylococcus aureus is among the most common zoonotic pathogens originating from animals consumed as food, especially raw chicken meat (RCM). As far as we know, this might be the first report that explores the efficacy of metal oxide nanoparticles (MONPs), such as zinc peroxide nanoparticles (ZnO-NPs), zinc oxide nanoparticles (ZnO-NPs), and titanium dioxide nanoparticles (TiO-NPs) against multidrug resistant (MDR) and/or pandrug resistant (PDR) S. aureus strains with a strong biofilm-producing ability isolated from RCM and giblets. Read More

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Nonthermal and selective crystal bridging of ZnO grains by irradiation with electron beam as nonequilibrium reaction field.

Rev Sci Instrum 2021 Feb;92(2):023905

Micro System Integration Center, Tohoku University, 519-1176 Aoba, Aramaki, Aoba-ku, Sendai 980-0845, Japan.

Ceramic particles, such as titanium oxide and indium tin oxide, are expected to be used as electric or catalytic materials for various applications. In this work, we progressed to employ the irradiation with an electron beam as the nonequilibrium reaction field for ceramic composition, and we successfully obtained the basic technology for a ceramic thin-film fabrication using a field emission (FE) electron beam with low energy resolution having a half width under 100 meV that had a homogeneous planar electron emission as the nonequilibrium reaction field. In particular, ZnO particles synthesized by electron beam irradiation show selective crystal bridging along the c-axis during FE electron beam irradiation, which is important for synthesizing poly-ZnO crystals without a heating process, because the energy fluctuations of FE electron beams are small and affect the directionality of ZnO crystal growth along the c-axis. Read More

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February 2021

Nanoparticles enhances the salinity toxicity tolerance in Linum usitatissimum L. by modulating the antioxidative enzymes, photosynthetic efficiency, redox status and cellular damage.

Ecotoxicol Environ Saf 2021 Apr 13;213:112020. Epub 2021 Feb 13.

Department of Botany, Plant Physiology Section, Faculty of Life Sciences, Aligarh Muslim University, Aligarh 202002, India. Electronic address:

The contribution of nanoparticles (NPs) in physiology of the plants became the new area of interest for the physiologists; as it is very much cost effective compared to the phytohormones. Our present investigation was also based on this interest in which the same doses (50 mg/L) of four different NPs were sprayed on stressed and non-stressed foliage. The experiment was conducted to assess the impact of four NPs viz. Read More

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Effect of Particle Size of Nano-Oxides on Color Stability and Mechanical Properties of Maxillofacial Silicone Elastomers: An In Vitro Study.

Int J Prosthodont 2021 Jan-Feb;34(1):54-60

Purpose: To evaluate the physical and mechanical properties of maxillofacial silicone elastomers following the incorporation of a specific particle size and concentration of nano-titanium dioxide (TiO) and nano-zinc oxide (ZnO).

Materials And Methods: Nano-TiO and nano-ZnO of 20-nm and 40-nm particle sizes and in 1% and 2% concentrations were chosen. Silicone elastomer samples were prepared according to the manufacturer's recommendations. Read More

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February 2021

Hybrid ZnO/chitosan antimicrobial coatings with enhanced mechanical and bioactive properties for titanium implants.

Carbohydr Polym 2021 Apr 16;257:117639. Epub 2021 Jan 16.

School of Dental Technology, College of Oral Medicine, Taipei Medical University, Taipei, 250, Taiwan. Electronic address:

A biocomposite coating comprising chitosan and ZnO deposited on a porous Ti oxide is developed to avoid orthopedic and dental implant-related infections. The coating comprised of an inner layer of nanoporous TiO and the outer layer of the chitosan matrix with ZnO nanoparticles. Microbiological tests show that chitosan coating is effective against Escherichia coli (E. Read More

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Combined Toxicity of Metal Nanoparticles: Comparison of Individual and Mixture Particles Effect.

Authors:
Ayse Basak Engin

Adv Exp Med Biol 2021 ;1275:165-193

Department of Toxicology, Faculty of Pharmacy, Gazi University, Ankara, Turkey.

Toxicity of metal nanoparticles (NPs) are closely associated with increasing intracellular reactive oxygen species (ROS) and the levels of pro-inflammatory mediators. However, NP interactions and surface complexation reactions alter the original toxicity of individual NPs. To date, toxicity studies on NPs have mostly been focused on individual NPs instead of the combination of several species. Read More

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February 2021

Enhanced photocatalytic degradation of methyl orange by coconut shell-derived biochar composites under visible LED light irradiation.

Environ Sci Pollut Res Int 2021 Jan 28. Epub 2021 Jan 28.

Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Graduate Studies Building, University of Malaya, 50603, Kuala Lumpur, Malaysia.

The conversion of carbon-rich biomass into valuable material is an environmental-friendly approach for its reutilization. In this study, coconut shell-derived biochar, graphitic carbon nitride (g-CN), g-CN/biochar, titanium dioxide (TiO)/biochar, zinc oxide (ZnO)/biochar, and ferric oxide (FeO)/biochar were synthesized and characterized by using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), surface area analysis, UV-Vis diffuse reflectance spectroscopy (DRS), and zeta potential analysis. The g-CN or metal oxide particles were found to be well-distributed on the coconut shell-derived biochar with the improvement in thermal stability and enlargement of specific surface area. Read More

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January 2021

Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model.

Heliyon 2021 Jan 15;7(1):e05952. Epub 2021 Jan 15.

Leibniz Institut für Analytische Wissenschaften-ISAS-e.V., Bunsen-Kirchhoff-Straße 11, 44139, Dortmund, Germany.

We synthesize and optically characterize pure PMMA and PMMA incorporated with metal oxides nanoparticles (MO NPs) such as ZnO, CuO, TiO and SiO NPs nanocomposite thin films with weight concentration of 10% using dip-coating technique. SEM images of MO NPs show that all NPs have nearly an average size of around 50 nm. The optical parameters such as, optical parameters ( and ), optoelectronics properties, dispersion, band-gap energy and band structure of as-prepared nanocomposite thin films were determined by analyzing the transmittance and reflectance spectra. Read More

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January 2021

TiO₂/ZnO Nanocomposite Material for Efficient Degradation of Methylene Blue.

J Nanosci Nanotechnol 2021 Apr;21(4):2511-2519

Dr. M.A Kazi Institute of Chemistry University of Sindh Jamshoro, 76080, Sindh Pakistan.

In this research work, we have produced a composite material consisting titanium dioxide (TiO₂) and zinc oxide (ZnO) nanostructures via precipitation method. Scanning electron microscopy (SEM) study has shown the mixture of nanostructures consisting nanorods and nano flower. Energy dispersive spectroscopy (EDS) study has confirmed the presence of Ti, Zn and O as main elements in the composite. Read More

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The Influence of ZnO Oxide Layer on the Physicochemical Behavior of Ti6Al4V Titanium Alloy.

Materials (Basel) 2021 Jan 5;14(1). Epub 2021 Jan 5.

Department of Materials Engineering and Biomaterials, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A Street, 44-100 Gliwice, Poland.

Titanium and its alloys are characterized by high biocompatibility and good corrosion resistance as a result of the ability to form a TiO oxide layer. However, based on literature data it can be concluded that titanium degradation products, in the form of titanium particles, metal-protein groups, oxides and ions, may cause allergic, inflammatory reactions and bone resorption. The corrosion process of Ti6Al4V in the human body environment may be intensified by a decreased pH and concentration of chloride compounds. Read More

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January 2021

Resistance of multidrug resistant Escherichia coli to environmental nanoscale TiO and ZnO.

Sci Total Environ 2021 Mar 14;761:144303. Epub 2020 Dec 14.

College of Life Sciences, Henan Normal University, Xinxiang 453007, China; Henan International Joint Laboratory of Agricultural Microbial Ecology and Technology (Henan Provincial Department of Science and Technology), Henan Normal University, Xinxiang 453007, China.

Excessive production and utilization of nanoparticles (NPs) at industrial and household levels releases substantial quantities of NPs into the environment. These can be harmful to different types of organisms and cause adverse effects on ecosystems. Purchased TiO and ZnO NPs were characterized via XRD, XPS, FESEM, and Zeta potential. Read More

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Photocatalytic-persulfate- oxidation for diclofenac removal from aqueous solutions: Modeling, optimization and biotoxicity test assessment.

Chemosphere 2021 Mar 2;266:129158. Epub 2020 Dec 2.

Laboratoire Biotechnologies, Ecole Nationale Supérieure de Biotechnologie, Ville Universitaire Ali Mendjeli, BP E66 25100, Constantine, Algeria.

In this paper, the influence of several aquatic factors (the nature of catalyst, the initial pH and the initial concentration of the pollutant) on the photocatalytic degradation of diclofenac (DFC), one of the most widely prescribed anti-inflammatory non-steroidal drug, was studied. Also, in order to examine the intensification process, the variation of the photocatalytic DFC degradation in the presence of sodium persulfate (PPS) was analyzed. It was found that, compared to titanium dioxide (TiO), the zinc oxide (ZnO) photocatalyst performed exceptionally well, with a 96. Read More

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Neutrophil activation by nanomaterials : comparing strengths and limitations of primary human cells with those of an immortalized (HL-60) cell line.

Nanotoxicology 2021 02 4;15(1):1-20. Epub 2020 Dec 4.

Nano-Safety Research Group, Heriot-Watt University, Edinburgh, UK.

Assessment of nanomaterial (NM) induced inflammatory responses has largely relied on rodent testing via measurement of leukocyte accumulation in target organs. Despite observations that NMs activate neutrophil driven inflammatory responses , a limited number of studies have investigated neutrophil responses to NMs . We compared responses between the human neutrophil-like HL-60 cell line and human primary neutrophils following exposure to silver (Ag), zinc oxide (ZnO), copper oxide (CuO) and titanium dioxide (TiO) NMs. Read More

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February 2021

Activated carbon/titanium dioxide composite to adsorb volatile organic compounds associated with human body odor.

Heliyon 2020 Nov 16;6(11):e05455. Epub 2020 Nov 16.

Fundamental Research Institute, Mandom Corp., 5-12, Juniken-cho, Chuo-ku, Osaka, Japan.

The human body generates various malodor compounds in different body parts and even in the same parts. A more effective and versatile deodorant material that can suppress various key contributors to the body odor must be developed to improve the quality of life of affected individuals. In this study, activated carbon (AC) was found to have higher adsorption ability toward key body odor-generating compounds than zinc oxide (ZnO), which is a well-known deodorant material. Read More

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November 2020

Nanocomposite films consisting of functional nanoparticles (TiO and ZnO) embedded in 4A-Zeolite and mixed polymer matrices (gelatin and polyvinyl alcohol).

Food Res Int 2020 11 22;137:109716. Epub 2020 Sep 22.

Department of Food Science, University of Massachusetts Amherst, Amherst, MA 01003, USA. Electronic address:

In this study, nanocomposite films with enhanced functional properties were prepared by loading titanium dioxide (TiO) and/or zinc oxide (ZnO) nanoparticles within 4A zeolite (4AZ) particles, and then incorporating these nanocomposites into a poly (vinyl alcohol) (PVA) and gelatin matrix. The composition and morphology of the films were characterized using atomic force microscopy (AFM), scanning electron microscopy (SEM), Fourier transform infrared (FTIR), and X-ray diffraction (XRD). The thermal behavior of the films was established using thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). Read More

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November 2020

Competing Deprotonation and Electron Capture Dissociation in MALDI Mass Spectrometry.

J Am Soc Mass Spectrom 2021 Jan 17;32(1):322-329. Epub 2020 Nov 17.

Laboratory of Mass Spectrometry, College of Chemistry, Central China Normal University, Wuhan, Hubei 430079, P.R. China.

A protonation/deprotonation mechanism has been established for the interpretation of ions in MALDI. We show herein that negative ions can be generated in different ways. Molecules with different electron affinities have been spotted on surfaces of TiO, ZnO, and a stainless steel plate for the investigation of electron capture dissociation in comparison with photo- or thermal-induced deprotonation upon irradiation of the third harmonic of Nd:YAG (355 nm) laser pulses. Read More

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January 2021

Appraisal of water matrix on the removal of fungicide residues by heterogeneous photocatalytic treatment using UV-LED lamp as light source.

Environ Sci Pollut Res Int 2020 Nov 13. Epub 2020 Nov 13.

Sustainability and Quality Group of Fruit and Vegetable Products, Murcia Institute of Agri-Food Research and Development, C/ Mayor s/n. La Alberca, 30150, Murcia, Spain.

In this study, the photocatalytic degradation of four fungicides, myclobutanil, penconazole and difenoconazole (triazole compounds) and boscalid (carboxamide), has been examined in different aqueous matrices (tap water, irrigation water and two WWPT effluents). Experiments were conducted at laboratory scale with different reagents-zinc oxide (ZnO), titanium dioxide (TiO), sodium persulphate (NaSO) and the combined systems ZnO/NaSO and TiO/NaSO-in water exposed to UV-LED irradiation. Previously, the effect of catalyst and oxidant loading on the disappearance kinetics of the different fungicides was assessed to know maximum degradation efficiency. Read More

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November 2020

Photocatalytic demulsification of oil/water emulsions containing nonionic surfactant.

Environ Sci Pollut Res Int 2021 Mar 10;28(11):13124-13132. Epub 2020 Nov 10.

Department of Chemical Engineering, American University of Sharjah, P.O.Box: 26666, Sharjah, UAE.

Separation of oil-water (OW) emulsions is investigated using a photocatalytic demulsification approach. Experiments were conducted using two types of photocatalysts, namely, ZnO and TiO. The emulsion samples were prepared with oil to water ratios of 1:3, 1:1, and 3:1 and using nonionic surfactant Tween 20 as an emulsifier. Read More

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Effect of food on orally-ingested titanium dioxide and zinc oxide nanoparticle behaviors in simulated digestive tract.

Chemosphere 2021 Apr 2;268:128843. Epub 2020 Nov 2.

State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, 210023, China. Electronic address:

Nanomaterials have been widely utilized in human daily life. The interaction between nanoparticles (NPs) and food matrices through oral ingestion is important for fate and potential toxicity of NPs. In this study, the interaction between NPs (i. Read More

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Synthesis and photocatalytic activity of porous ZnO stabilized by TiO and FeO nanoparticles: investigation of pesticide degradation reaction in water treatment.

Environ Sci Pollut Res Int 2021 Feb 31;28(8):9146-9156. Epub 2020 Oct 31.

Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran.

The present research studies the photocatalytic degradation of a pesticide using TiO and FeO nanoparticles supported on ZnO mesoporous (mZnO) substrate. Chlorpyrifos is an organophosphate pesticide with a CHClNOPS chemical formula. It is broadly utilized in agricultural fields to control product pests. Read More

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February 2021

High colloidal stability ZnO nanoparticles independent on solvent polarity and their application in polymer solar cells.

Sci Rep 2020 Oct 22;10(1):18055. Epub 2020 Oct 22.

Department of Energy Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulju-gun, Ulsan, 44919, Republic of Korea.

Significant aggregation between ZnO nanoparticles (ZnO NPs) dispersed in polar and nonpolar solvents hinders the formation of high quality thin film for the device application and impedes their excellent electron transporting ability. Herein a bifunctional coordination complex, titanium diisopropoxide bis(acetylacetonate) (Ti(acac)) is employed as efficient stabilizer to improve colloidal stability of ZnO NPs. Acetylacetonate functionalized ZnO exhibited long-term stability and maintained its superior optical and electrical properties for months aging under ambient atmospheric condition. Read More

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October 2020