221 results match your criteria co-doped graphene

Chromium and cerium co-doped magnetite/reduced graphene oxide nanocomposite as a potent antibacterial agent against S. aureus.

Chemosphere 2021 Jul 15;274:129988. Epub 2021 Feb 15.

Social Determinants of Health Research Center, Department of Environmental and Occupational Health, Ardabil University of Medical Sciences, Ardabil, Iran. Electronic address:

The development of innovative antibacterial samples with high efficacy has received a great deal of interest. Herein, we synthesized magnetite modified by Cr and co-modified by Cr and Ce, along with their reduced graphene oxide (rGO)-based nanocomposites via facile hydrothermal and co-precipitation methods. The rGO-based samples showed proper magnetic behavior, high porosity, and vast specific surface area. Read More

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Nitrogen, sulfur co-doped hierarchical carbon encapsulated in graphene with "sphere-in-layer" interconnection for high-performance supercapacitor.

J Colloid Interface Sci 2021 Apr 21;599:443-452. Epub 2021 Apr 21.

Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China. Electronic address:

Rational design of electrode with hierarchical charge-transfer structure and good electronic conductivity is important to achieve high specific capacitance and energy density for supercapacitor, but it still remains a challenge. Herein, a nitrogen, sulfur co-doped pollen-derived carbon/graphene (PCG) composite with interconnected "sphere-in-layer" structure was fabricated, in which hierarchically pollen-derived carbon microspheres can serve as "porous spacers" to prevent the agglomeration of graphene nanosheets. The optimized PCG composite prepared with 0. Read More

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Catalysis-induced performance enhancement of an electrochemical microcystin-LR aptasensor based on cobalt-based oxide on a B, N co-doped graphene hydrogel.

Analyst 2021 Apr;146(8):2574-2580

Key Laboratory of Modern Agriculture Equipment and Technology, School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, P.R. China.

Microcystin detection is of great significance and an urgent need because of its damage to water environments and human health. In this paper, an electrochemical aptasensor was developed by combining a 3D cobalt-based oxide modified boron and nitrogen co-doped graphene hydrogel (3D BNG/Co) with a DNA aptamer for sensitive detection of microcystin (MC-LR) through differential pulse voltammetry (DPV) technology. By using 3D BNG/Co as a catalyst and [Fe(CN)6]3-/4- as a redox probe, the catalytic current signal was 3. Read More

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Promising photodynamic antimicrobial activity of polyimine substituted zinc phthalocyanine and its polycationic derivative when conjugated to nitrogen, sulfur, co-doped graphene quantum dots against Staphylococcus aureus.

Photodiagnosis Photodyn Ther 2021 Apr 21;34:102300. Epub 2021 Apr 21.

Institute for Nanotechnology Innovation, Department of Chemistry, Rhodes University, PO Box 94, Grahamstown, 6140, South Africa. Electronic address:

Antimicrobial resistance is a most important problem facing the treatment of infectious diseases. Antimicrobial photodynamic therapy is an alternative treatment strategy, considered to be cost-effective and feasible. For this purpose, octa-imine substituted ZnPc (3) have been prepared and conjugated to nitrogen, sulfur co-doped graphene quantum dots (N,S-GQDs) through π-π stacking. Read More

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Cobalt-Doping of Molybdenum Disulfide for Enhanced Catalytic Polysulfide Conversion in Lithium-Sulfur Batteries.

ACS Nano 2021 Apr 9;15(4):7491-7499. Epub 2021 Apr 9.

Shenzhen Geim Graphene Center, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, 518055, China.

Metal sulfides, such as MoS, are widely investigated in lithium-sulfur (Li-S) batteries to suppress the shuttling of lithium polysulfides (LiPSs) due to their chemical adsorption ability and catalytic activity. However, their relatively low conductivity and activity limit the LiPS conversion kinetics. Herein, the Co-doped MoS is proposed to accelerate the catalytic conversion of LiPS as the Co doping can promote the transition from semiconducting 2H phase to metallic 1T phase and introduce the sulfur vacancies in MoS. Read More

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Preparation of functionalized graphene and ionic liquid co-doped polypyrrole solid phase microextraction coating for the detection of benzoates preservatives.

Talanta 2021 Jun 2;228:122231. Epub 2021 Mar 2.

College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, PR China. Electronic address:

A novel solid-phase microextraction coating based on polypyrrole (Ppy) with manganese dioxide modified 6-aminohexanoic acid functionalized graphene (MnO-fGr) and 1-allyl-3-vinylimidazolium bis(trifluoromethylsulfonyl)imide ([AVIm]NTf) as dopants (Ppy/MnO-fGr/[AVIm]NTf) was successfully prepared by electrochemical method. The composite coating was characterized by scanning electron microscope (SEM), Fourier infrared spectrum (FT-IR) and thermogravimetry (TG). The composite coating showed coarse structure, which could improve the specific surface area of it, and according to the TG curve, it also had good thermal stability. Read More

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Spray-dried assembly of 3D N,P-Co-doped graphene microspheres embedded with core-shell CoP/MoP@C nanoparticles for enhanced lithium-ion storage.

Dalton Trans 2021 Apr 17;50(13):4555-4566. Epub 2021 Mar 17.

Shanghai Electrochemical Energy Devices Research Centre, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

The advancement of novel synthetic approaches for micro/nanostructural manipulation of transition metal phosphide (TMP) materials with precisely controlled engineering is crucial to realize their practical use in batteries. Here, we develop a novel spray-drying strategy to construct three-dimensional (3D) N,P co-doped graphene (G-NP) microspheres embedded with core-shell CoP@C and MoP@C nanoparticles (CoP@C⊂G-NP, MoP@⊂G-NP). This intentional design shows a close correlation between the microstructural G-NP and chemistry of the core-shell CoP@C/MoP@C nanoparticle system that contributes towards their anode performance in lithium-ion batteries (LIBs). Read More

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Synergistic Effect of N-Doped sp Carbon and Porous Structure in Graphene Gels toward Selective Oxidation of C-H Bond.

ACS Appl Mater Interfaces 2021 Mar 11;13(11):13087-13096. Epub 2021 Mar 11.

School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin University, Tianjin 300072, People's Republic of China.

N-doped carbon materials represent a type of metal-free catalyst for diverse organic synthetic reactions. However, single N-doped carbon materials perform insufficiently in the selective oxidation reaction of C-H bond compared with metal catalysts or multielement co-doped materials. There are a few reports on the application of three-dimensional (3D) carbon materials in such a reaction. Read More

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An ultrasensitive heart-failure BNP biosensor using B/N co-doped graphene oxide gel FET.

Biosens Bioelectron 2021 May 26;180:113114. Epub 2021 Feb 26.

Mechanical and Mechatronics Engineering, University of Waterloo, Waterloo, ON, Canada; Waterloo Institute for Nanotechnology (WIN), University of Waterloo, Waterloo, ON, Canada.

Heart failure (HF) is the number one cause of death in the world. B-type natriuretic peptide (BNP) is a recognized biomarker for HF and can be used for early detection. Field effect transistor (FET) biosensors have the ability to sense BNP in much shorter times than conventional clinical studies. Read More

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Hierarchical N,P co-doped graphene aerogels framework assembling vertically grown CoMn-LDH nanosheets as efficient bifunctional electrocatalyst for rechargeable Zinc-air battery.

J Colloid Interface Sci 2021 May 1;590:476-486. Epub 2021 Feb 1.

Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education, School of Environmental Science and Technology, Dalian University of Technology, Linggong road 2#, Dalian 116024, China.

Exploiting the low-cost and high-efficiency bifunctional oxygen electrocatalysts to substitute platinum-group metals is highly desirable but challenging for energy storage/conversion technologies. Herein, we develop a combined gelation/self-assemble/freeze drying process to fabricate a free-standing porous architectures through vertical anchoring two-dimensional (2D) CoMn-LDH nanosheets on three-dimensional (3D) hierarchical N,P co-doped graphene aerogels (NPGA) framework. This unique configuration endows CoMn-LDH/NPGA outstanding catalytic activity toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with a potential difference of ca. Read More

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Development of a novel graphitic carbon nitride and multiwall carbon nanotube co-doped Ti/PbO anode for electrocatalytic degradation of acetaminophen.

Chemosphere 2021 May 2;271:129830. Epub 2021 Feb 2.

School of Basic Medical Sciences, Southwest Medical University, Luzhou, 646000, PR China. Electronic address:

In this work, we have constructed a novel graphitic carbon nitride/multiwall carbon nanotube (GCN/CNT) doped Ti/PbO as anode for highly effective degradation of acetaminophen (ACE) wastewater. The ACE removal efficiency of 83.2% and chemical oxygen demand removal efficiency of 76. Read More

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Preparation and Application of Fe-N Co-Doped GNR@CNT Cathode Oxygen Reduction Reaction Catalyst in Microbial Fuel Cells.

Nanomaterials (Basel) 2021 Feb 2;11(2). Epub 2021 Feb 2.

Beijing Key Laboratory of Electrochemical Process and Technology for Materials, Beijing University of Chemical Technology, Beijing 100029, China.

Through one-step pyrolysis, non-noble-metal oxygen reduction reaction (ORR) electrocatalysts were constructed from ferric trichloride, melamine, and graphene nanoribbon@carbon nanotube (GNR@CNT), in which a portion of the multiwall carbon nanotube is unwrapped/unzipped radially, and thus graphene nanoribbon is exposed. In this study, Fe-N/GNR@CNT materials were used as an air-cathode electrocatalyst in microbial fuel cells (MFCs) for the first time. The Fe-N/C shows similar power generation ability to commercial Pt/C, and its electron transfer number is 3. Read More

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February 2021

Enhanced electrocatalytic activity of PtRu/nitrogen and sulphur co-doped crumbled graphene in acid and alkaline media.

J Colloid Interface Sci 2021 May 21;590:154-163. Epub 2021 Jan 21.

Univ. Lille, CNRS, Centrale Lille, Univ. Polytechnique Hauts-de-France, UMR 8520, IEMN, F-59000 Lille, France. Electronic address:

The low mass activity and high price of pure platinum (Pt)-based catalysts predominantly limit their large-scale utilization in electrocatalysis. Therefore, the reduction of Pt amount while preserving the electrocatalytic efficiency represents a viable alternative. In this work, we prepared new PtRu nanoparticles supported on sulphur and nitrogen co-doped crumbled graphene with trace amounts of iron (PtRu/PF) electrocatalysts. Read More

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Porous 3D graphene aerogel co-doped with nitrogen and sulfur for high-performance supercapacitors.

Nanotechnology 2021 May;32(19):195405

College of Material Engineering, Shanghai University of Engineering Science 333 Long Teng Road, Shanghai 201620, People's Republic of China.

Heteroatom-doped carbon materials with a high specific area, a well-defined porous structure is important to high-performance supercapacitors (SCs). Here, S and N co-doped three-dimensional porous graphene aerogel (NS-3DPGHs) have been synthesized in a facile and efficient self-assembly process with thiourea acting as the reducing and doping agent solution. Operating as a SC electrode, fabricated co-doping graphene, i. Read More

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N, S and Transition-Metal Co-Doped Graphene Nanocomposites as High-Performance Catalyst for Glucose Oxidation in a Direct Glucose Alkaline Fuel Cell.

Nanomaterials (Basel) 2021 Jan 14;11(1). Epub 2021 Jan 14.

Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China.

In this work, reduced graphene oxide (rGO) nanocomposites doped with nitrogen (N), sulfur (S) and transitional metal (Ni, Co, Fe) were synthesized by using a simple one-step in-situ hydrothermal approach. Electrochemical characterization showed that rGO-NS-Ni was the most prominent catalyst for glucose oxidation. The current density of the direct glucose alkaline fuel cell (DGAFC) with rGO-NS-Ni as the anode catalyst reached 148. Read More

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January 2021

Single-step synthesis of N, S co-doped waste-derived nanoporous carbon sorbent for mercury vapor removal.

Environ Sci Pollut Res Int 2021 Apr 4;28(14):17265-17274. Epub 2021 Jan 4.

Department of environmental Engineering, Faculty of natural resources and environment, Science and research branch, Islamic Azad University, Tehran, Iran.

As well known, mercury is a toxic trace element due to its bioaccumulation and volatility which results in severe effects in health of ecosystems and humans' life. Herein, for the first time, the synthesis of a N and S dual-doped waste-derived graphene-like nanoporous carbon via a facile and single-step route is presented and its capability in mercury vapor removal from gas streams is investigated. To prepare a modified adsorbent, thiourea was utilized as the doping agent to induce nitrogen and sulfur dopants into the nanoporous carbon structure derived from pyrolysis of cabbage (Capitat. Read More

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Novel joint catalytic properties of Fe and N co-doped graphene for CO oxidation.

Phys Chem Chem Phys 2020 Dec;22(48):28376-28382

Laboratory of Advanced Materials Physics and Nanodevices, School of Physics and Technology, University of Jinan, Jinan, Shandong 250022, China.

Using density functional theory, we have performed detailed calculations of the joint catalytic activity of graphene co-doped with Fe and N atoms. The Fe atom can be located on single vacancy graphene and acts as the active site. Due to the strong attraction of the Fe ion, the O-O bond length of the O2 molecule is elongated, which decreases the bonding energy between the O atoms. Read More

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December 2020

Preparation and electrochemical treatment application of Ti/Sb-SnO-Eu&rGO electrode in the degradation of clothianidin wastewater.

Chemosphere 2021 Feb 28;265:129126. Epub 2020 Nov 28.

School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China; Shandong Key Laboratory of Water Pollution Control and Resource Reuse, Qingdao, 266237, China. Electronic address:

This work investigated the preparation of Ti/Sb-SnO electrode co-doped with graphene and europium and the electrochemical degradation of clothianidin in aqueous solution with Ti/Sb-SnO-Eu&rGO electrode. The physicochemical properties of different electrodes were characterized by using the scanning electron microscopy, X-ray diffraction, oxygen evolution potential and cyclic voltammetry tests. The results indicated that the Ti/Sb-SnO-Eu&rGO electrodes have a compact structure and fine grain size and have a higher oxygen evolution overpotential than Ti/Sb-SnO-None, Ti/Sb-SnO-Eu and Ti/Sb-SnO-rGO electrodes. Read More

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February 2021

Study on the fluorescence of double-emission carbon quantum dots by improved intercept method.

Methods Appl Fluoresc 2020 Nov 18. Epub 2020 Nov 18.

Jiangsu University, Zhenjiang, Jiangsu, CHINA.

The fluorescence mechanism of dual-emission carbon quantum dots (DCQDs) is investigated by the improved intercept method, of which the DCQDs with high quantum yield are synthesized by hydrothermal method by using the precursor of sulfadiazine. The research of the morphology, chemical properties and fluorescence properties on DCQDs, shows that DCQDs have graphene-like structure and well-resolved lattice fringes, and that DCQDs fluorescence emission as well intensity has reversibility between acid and alkaline. Based on the ultraviolet absorption spectrum (UV-vis) of the DCQDs, the band gap of DCQDs is estimated by the improved intercept method. Read More

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November 2020

Carbon quantum dots decorated heteroatom co-doped core-shell Fe@POCN for degradation of tetracycline via multiply synergistic mechanisms.

Chemosphere 2021 Apr 28;268:128806. Epub 2020 Oct 28.

School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, 330013, Jiangxi Province, China. Electronic address:

In this study, novel core-shell catalyst with a new ternary heterostructure was synthesized (Fe@POCN/CQDs) for the degradation of tetracycline (TC). The TEM results showed that the Fe particles were wrapped in POCN material and many nano CQDs were uniformly dispersed in the material. The new ternary nanocomposite exhibits excellent photocatalytic activity for the removal of TC, which was approximately 4. Read More

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Manganese-nitrogen and gadolinium-nitrogen Co-doped graphene quantum dots as bimodal magnetic resonance and fluorescence imaging nanoprobes.

Nanotechnology 2021 Feb;32(9):095103

Department of Physics and Astronomy, Texas Christian University, TCU Box 298840, Fort Worth, Texas 76129, United States of America.

Graphene quantum dots (GQDs) are unique derivatives of graphene that show promise in multiple biomedical applications as biosensors, bioimaging agents, and drug/gene delivery vehicles. Their ease in functionalization, biocompatibility, and intrinsic fluorescence enable those modalities. However, GQDs lack deep tissue magnetic resonance imaging (MRI) capabilities desirable for diagnostics. Read More

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February 2021

Electrochemical detection of white spot syndrome virus with a silicone rubber disposable electrode composed of graphene quantum dots and gold nanoparticle-embedded polyaniline nanowires.

J Nanobiotechnology 2020 Oct 27;18(1):152. Epub 2020 Oct 27.

Laboratory of Biotechnology, Department of Bioscience, Graduate School of Science and Technology, Shizuoka University, 836 Ohya, Suruga-ku, Shizuoka, 422-8529, Japan.

Background: With the enormous increment of globalization and global warming, it is expected that the number of newly evolved infectious diseases will continue to increase. To prevent damage due to these infections, the development of a diagnostic method for detecting a virus with high sensitivity in a short time is highly desired. In this study, we have developed a disposable electrode with high-sensitivity and accuracy to evaluate its performances for several target viruses. Read More

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October 2020

Nitrogen and sulfur co-doped graphene quantum dots/nanocellulose nanohybrid for electrochemical sensing of anti-schizophrenic drug olanzapine in pharmaceuticals and human biological fluids.

Int J Biol Macromol 2020 Dec 20;165(Pt B):2030-2037. Epub 2020 Oct 20.

Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, Egypt. Electronic address:

A nanohybrid prepared from green source (nanocellulose, NC) and nitrogen, sulfur co-doped graphene quantum dots (N, S@GQDs) was prepared for the electrochemical detection of olanzapine (OLZ), atypical antipsychotic primarily used to treat schizophrenia and bipolar disorder. Polar groups on the surface of NC and N, S@GQDs provide more anchoring sites for adsorption of OLZ onto the electrode surface. In addition, it provides high conductivity, good mechanical strength, large surface area, and excellent electrical conductivity. Read More

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December 2020

Ionic liquid-sensitized molecularly imprinted polymers based on heteroatom co-doped quantum dots functionalized graphene for sensitive detection of λ-cyhalothrin.

Anal Chim Acta 2020 Nov 29;1136:9-18. Epub 2020 Aug 29.

Beijing Advanced Innovation Center for Food Nutrition and Human Health, Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology and Business University, 11 Fucheng Road, Beijing, 100048, China.

Ionic liquid-sensitized molecularly imprinted polymers (MIPs) based on Mn and Cu co-doped ZnInS quantum dots functionalized graphene (QDs-G@ILMIPs) were prepared by a one-pot facile polymerization at room temperature. Here, the ionic liquid was used as functional monomers to provide chemical bonds for the recognition sites of target molecules. The ionic liquid was also used to improve the selectivity and adsorption capacity, and enhance the fluorescence stability and sensitivity of the MIPs for surface modification. Read More

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November 2020

Alpha-MnO nanofibers/nitrogen and sulfur-co-doped reduced graphene oxide for 4.5 V quasi-solid state supercapacitors using ionic liquid-based polymer electrolyte.

J Colloid Interface Sci 2021 Feb 22;583:734-745. Epub 2020 Sep 22.

Graphene and Printed Electronics for Dual-Use Applications Research Division (GPERD), Nation Security and Dual-Use Technology Center (NSD), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Phahonyothin Road, Tambon Klong Nueng, Amphoe Klong Luang, Phathum Thani 12120, Thailand. Electronic address:

α-MnO nanofibers combined with nitrogen and sulfur co-doped reduced graphene oxide (α-MnO/N&S-rGO) were prepared through simple hydrothermal and ball milling processes. Structural characterization results by X-ray diffraction, X-ray photoemission spectroscopy, electron microscopy and Raman spectroscopy demonstrated that α-MnO nanofibers with the average diameter of ~40 nm were well dispersed on N&S-rGO nanoflakes. The synthesized material was incorporated into supercapacitor (SC) electrodes and assembled with the quasi-solid-state electrolyte comprising N,N-Diethyl-N-methyl-N-(2-methoxy-ethyl)ammonium bis (trifluoromethyl-sulfonyl)amide [DEME][TFSA]/polyvinylidene fluoride-hexafluoropropylene (PVDF-co-HFP) to produce coin-cell SCs. Read More

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February 2021

Rational prediction of multifunctional bilayer single atom catalysts for the hydrogen evolution, oxygen evolution and oxygen reduction reactions.

Nanoscale 2020 Oct;12(39):20413-20424

School of Materials Science and Engineering, Beihang University, Beijing, 100191, China.

Bimetallic atom catalysts (BACs), which can exhibit remarkable catalytic performance compared with single atom catalysts (SACs) due to their higher metal loading and the synergy between two metal atoms, have attracted great attention in research. Herein, by means of density functional theory calculations, novel BACs with a bilayer structure composed of monolayers FeN4 (Fe and nitrogen co-doped graphene) and MN4 (Fe/M, M represents transition metal atoms) as electrocatalysts for the hydrogen evolution reaction (HER), oxygen reduction reaction (ORR), and oxygen evolution reaction (OER) are investigated. Among these bilayer SACs, a series of highly efficient monofunctional, bifunctional, and even trifunctional electrocatalysts have been screened. Read More

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October 2020

Synthesis of nitrogen and sulfur doped graphene on graphite foam for electro-catalytic phenol degradation and water splitting.

J Colloid Interface Sci 2021 Feb 23;583:139-148. Epub 2020 Sep 23.

School of Chemical Engineering, The University of Adelaide, Adelaide, SA 5005, Australia.

A rational design of electrode materials with both high electron conductivity and abundant of catalytic sites is essential for high-performance electrochemical reactions. Herein, a nitrogen and sulfur co-doped graphene (SNG) anchored on the interconnected conductive graphite foam (GF) is fabricated via drop-casting and in situ annealing. The SNG flakes are tightly immobilized on the GF surface, which can provide fast electron transfer rate and large electrolyte/electrode interfaces. Read More

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February 2021

Highly Exposed Active Sites of Fe/N Co-doped Defect-rich Graphene as an Efficient Electrocatalyst for Oxygen Reduction Reaction.

Chem Asian J 2020 Nov 6;15(21):3527-3534. Epub 2020 Oct 6.

School of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, 255049, P. R. China.

A defect-rich interconnected hierarchical three-dimensional Fe and N co-doped graphene has been prepared by a facile synthesis with poly (2,5-benzimidazole) (ABPBI) as nitrogen and carbon sources and CaCO as the template. ABPBI possesses abundant nitrogen, and pyrolysis of ABPBI is helpful to form graphene structure. CaCO and its decomposition products CO can promote the formation of interconnected hierarchical porous three-dimensional graphene, which possesses more defects and exposed active sites. Read More

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November 2020

Ultrasensitive Detection of Tetracycline Using Boron and Nitrogen Co-Doped Graphene Quantum Dots from Natural Carbon Source as the Paper-Based Nanosensing Probe in Difference Matrices.

Nanomaterials (Basel) 2020 Sep 20;10(9). Epub 2020 Sep 20.

Department of Biomedical Engineering and Environmental Sciences, National Tsing Hua University, 101, Sec. 2, Kuang Fu Road, Hsinchu 30013, Taiwan.

Herein, the boron and nitrogen co-doped 0-dimensional graphene quantum dots (B,N-GQDs) with high quantum yield (QY) were synthesized via microwave-assisted hydrothermal method at 170 °C for 20 min using fresh passion fruit juice and boric acid as the starting materials. The 3-6 layers of B,N-GQDs with mean particle size of 9 ± 1 nm were then used for ultra-sensitive and selective detection of tetracycline in aqueous and biological media. The hybridization of boron and nitrogen atoms into the GQD structures increases the intensity of electronegative, resulting in the enhancement of QY to 50 ± 1%. Read More

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September 2020

Boric acid modified S and N co-doped graphene quantum dots as simple and inexpensive turn-on fluorescent nanosensor for quantification of glucose.

Spectrochim Acta A Mol Biomol Spectrosc 2021 Jan 28;245:118892. Epub 2020 Aug 28.

Faculty of Chemistry, Kharazmi University, Tehran, Iran; Research Institute of Green Chemistry, Kharazmi University, Tehran, Iran.

A new fluorescent nanosensor based on S and N co-doped graphene quantum dots (S,N-GQDs) modified by boric acid was designed for glucose detection. First, the S,N-GQDs was prepared via one pot hydrothermal process utilizing citric acid and thiourea as precursors. Then, S,N-GQDs was modified by boric acid to fabricate (B)/S,N-GQDs. Read More

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January 2021