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Kaloudi AS, Zygouri P, Spyrou K, Athinodorou AM, Papanikolaou E, Subrati M, Moschovas D, Datta KKR, Sideratou Z, Avgeropoulos A, Simos YV, Tsamis KI, Peschos D, Yentekakis IV, Gournis DP. A Strategic Synthesis of Orange Waste-Derived Porous Carbon via a Freeze-Drying Method: Morphological Characterization and Cytocompatibility Evaluation. Molecules 2024; 29:3967. [PMID: 39203045 PMCID: PMC11357121 DOI: 10.3390/molecules29163967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 08/06/2024] [Accepted: 08/17/2024] [Indexed: 09/03/2024] Open
Abstract
Porous carbon materials from food waste have gained growing interest worldwide for multiple applications due to their natural abundance and the sustainability of the raw materials and the cost-effective synthetic processing. Herein, orange waste-derived porous carbon (OWPC) was developed through a freeze-drying method to prevent the demolition of the original biomass structure and then was pyrolyzed to create a large number of micro, meso and macro pores. The novelty of this work lies in the fact of using the macro-channels of the orange waste in order to create a macroporous network via the freeze-drying method which remains after the pyrolysis steps and creates space for the development of different types of porous in the micro and meso scale in a controlled way. The results showed the successful preparation of a porous carbon material with a high specific surface area of 644 m2 g-1 without any physical or chemical activation. The material's cytocompatibility was also investigated against a fibroblast cell line (NIH/3T3 cells). OWPC triggered a mild intracellular reactive oxygen species production without initiating apoptosis or severely affecting cell proliferation and survival. The combination of their physicochemical characteristics and high cytocompatibility renders them promising materials for further use in biomedical and pharmaceutical applications.
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Affiliation(s)
- Angela S. Kaloudi
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Panagiota Zygouri
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos Spyrou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
| | - Antrea-Maria Athinodorou
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Eirini Papanikolaou
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Mohammed Subrati
- Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, Aghia Paraskevi, 15310 Attikis, Greece
| | - Dimitrios Moschovas
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - K. K. R. Datta
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India
| | - Zili Sideratou
- Institute of Nanoscience and Nanotechnology, NCSR “Demokritos”, Aghia Paraskevi, 15310 Attikis, Greece
| | - Apostolos Avgeropoulos
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece
| | - Yannis V. Simos
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Konstantinos I. Tsamis
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Dimitrios Peschos
- Nanomedicine and Nanobiotechnology Research Group, University of Ioannina, 45110 Ioannina, Greece
- Laboratory of Physiology, Department of Medicine, School of Health Sciences, University of Ioannina, 45110 Ioannina, Greece
| | - Ioannis V. Yentekakis
- School of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, Greece
- Institute of GeoEnergy, Foundation for Research and Technology-Hellas, 73100 Chania, Greece
| | - Dimitrios P. Gournis
- School of Chemical and Environmental Engineering, Technical University of Crete, 73100 Chania, Greece
- Institute of GeoEnergy, Foundation for Research and Technology-Hellas, 73100 Chania, Greece
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Aravind SP, Anandhu TP, Jayakumar K, Appukuttan A, Rahul Krishna B, Amala J, Bhuvaneshwari S. Activated carbon based paste electrodes for the simultaneous and effective detection of divalent cadmium and lead ions in wastewater. ENVIRONMENTAL TECHNOLOGY 2024; 45:3062-3075. [PMID: 37115617 DOI: 10.1080/09593330.2023.2206528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 04/13/2023] [Indexed: 05/05/2023]
Abstract
Heavy metals (HM) have gained significant attention in terms of regular monitoring and detection owing to their toxicity, non-biodegradability, and persistence. Current techniques for detecting HM are expensive, cumbersome, and require sophisticated instruments and skilled labour. Hence, developing cheap, rapid, energy-efficient, and accurate sensors is imperative and electrochemical techniques have emerged as promising tools. The current study involves the fabrication of an electrochemical sensor for the concurrent detection of lead (Pb2+) and cadmium (Cd2+) ions using modified carbon paste electrodes (mCPE). Activated carbon (AC) with a BET surface area of 1118 m2 g-1 was obtained by chemical activation and thermal treatment of the waste rubberwood sawdust. AC-Graphite, AC-Reduced Graphene Oxide (RGO), and AC-RGO-Chitosan were the types of mCPEs that were utilised. The electrochemical behaviours and effects of pH, concentration, and scan rate were studied using Cyclic voltammetry (CV). Studies on detection were conducted using CV and linear sweep voltammetry. Although all the 3 mCPEs detected Cd2+ and Pb2+ in the simulated wastewater, the CPE with RGO and AC could detect Cd2+ as low as 10.91 µg L-1 and Pb2+ as low as 14.01 µg L-1. The work explored the possibility of using AC as a potential sustainable substitute for graphite in CPE.
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Affiliation(s)
- S P Aravind
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - T P Anandhu
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - Karthik Jayakumar
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - Ashna Appukuttan
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - B Rahul Krishna
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - J Amala
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
| | - S Bhuvaneshwari
- Department of Chemical Engineering, National Institute of Technology Calicut, Calicut, India
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Buta JG, Dame B, Ayala T. Nitrogen-doped ordered mesoporous carbon supported ruthenium metallic nanoparticles: Opportunity for efficient hydrogenolysis of biomass-derived 5-hydroxymethylfurfural to 2,5-dimethylfuran by catalytic transfer hydrogenation. Heliyon 2024; 10:e26690. [PMID: 38455557 PMCID: PMC10918172 DOI: 10.1016/j.heliyon.2024.e26690] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/14/2024] [Accepted: 02/18/2024] [Indexed: 03/09/2024] Open
Abstract
One of the most promising solutions to the current energy crisis is an efficient catalytic transformation of abundant low-cost renewable raw biomass into high-quality biofuel. Herein, a highly effective catalyst was constructed systematically for the selective synthesis of 2,5-dimethylfuran (DMF) biofuel from biomass-derived 5-hydroxymethylfurfural (HMF) via green catalytic transfer hydrogenolysis (CTH) using a nitrogen-doped ordered mesoporous carbon (N-CMK-1) decorated ruthenium (Ru)-based catalyst in i-propanol as hydrogen source. The structures and properties of different catalysts were characterized by different characterization techniques such as FTIR, XRD, N2-sorption, CO2-sorption, TGA, TEM, ICP-AES, CHNO analysis, and acid-base back titration. A complete HMF conversion with a high DMF yield of 88% was achieved under optimized reaction conditions. Regarding substrate conversion and product yield, the influence of reaction temperature, time, and hydrogen donors was thoroughly investigated. The nitrogen-promoted carbon support enhanced the dispersion of Ru due to the formation of appropriate basic site density which could efficiently promote the activation of alcohol hydroxyl in i-propanol and subsequent release of active hydrogen species. In the meantime, highly dispersed surface Ru nanoparticles (NPs) were beneficial for hydrogen transfer and activation of both carbonyl and hydroxyl groups in HMF. Moreover, Arrhenius kinetic analysis was studied by identifying 5-methyl furfural (5-MF) and 2,5-bishydroxymethylfuran (BHMF) as two key intermediates that dominate a distinct reaction pathway during hydrogenolysis of HMF to DMF via CTH. Furthermore, high stability without obvious loss of activity after three consecutive cycles was observed in a fabricated N-CMK-1 decorated Ru-based catalyst as a result of superior metal-support interaction and the mesoporous framework nature of the catalyst. These findings would not only offer a robust catalyst synthetic approach but also open a new avenue for the exploitation of biomass to specialty chemicals and advanced biofuels.
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Affiliation(s)
- Jibril Goli Buta
- School of Mechanical, Chemical and Materials Engineering, Department of Chemical Engineering, Adama Science and Technology University, Adama, Ethiopia
| | - Bayisa Dame
- School of Mechanical, Chemical and Materials Engineering, Department of Chemical Engineering, Adama Science and Technology University, Adama, Ethiopia
| | - Tariku Ayala
- School of Mechanical, Chemical and Materials Engineering, Department of Chemical Engineering, Adama Science and Technology University, Adama, Ethiopia
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Sakthivel R, Lin YC, Yu MC, Dhawan U, Liu X, Chen JC, Tung CW, Chung RJ. A sensitive sandwich-type electrochemical immunosensor using nitrogen-doped graphene/metal-organic framework-derived CuMnCoO x and Au/MXene for the detection of breast cancer biomarker. Colloids Surf B Biointerfaces 2024; 234:113755. [PMID: 38241894 DOI: 10.1016/j.colsurfb.2024.113755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/08/2024] [Accepted: 01/10/2024] [Indexed: 01/21/2024]
Abstract
In terms of cancer-related deaths among women, breast cancer (BC) is the most common. Clinically, human epidermal growth receptor 2 (HER2) is one of the most commonly used diagnostic biomarkers for facilitating BC cell proliferation and malignant growth. In this study, a disposable gold electrode (DGE) modified with gold nanoparticle-decorated Ti3C2Tx (Au/MXene) was utilized as a sensing platform to immobilize the capturing antibody (Ab1/Au/MXene). Subsequently, nitrogen-doped graphene (NG) with a metal-organic framework (MOF)-derived copper-manganese-cobalt oxide, tagged as NG/CuMnCoOx, was used as a probe to label the detection antibody (Ab2). A sandwich-type immunosensor (NG/CuMnCoOx/Ab2/HER2-ECD /Ab1/Au/MXene/DGE) was developed to quantify HER2-ECD. NG/CuMnCoOx enhances the conductivity, electrocatalytic active sites, and surface area to immobilize Ab2. In addition, Au/MXene facilitates electron transport and captures more Ab1 on its surface. Under optimal conditions, the resultant immunosensor displayed an excellent linear range of 0.0001 to 50.0 ng. mL-1. The detection limit was 0.757 pg·mL-1 with excellent selectivity, appreciable reproducibility, and high stability. Moreover, the applicability for determining HER2-ECD in human serum samples indicates its ability to monitor tumor markers clinically.
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Affiliation(s)
- Rajalakshmi Sakthivel
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan
| | - Yu-Chien Lin
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan; Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan
| | - Min-Chin Yu
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan
| | - Udesh Dhawan
- Centre for the Cellular Microenvironment, Division of Biomedical Engineering, James Watt School of Engineering, Mazumdar-Shaw Advanced Research Centre, University of Glasgow, Glasgow, UK
| | - Xinke Liu
- College of Materials Science and Engineering, Chinese Engineering and Research Institute of Microelectronics, Shenzhen University, Shenzhen, China; Department of Electrical and Computer Engineering, National University of Singapore, Singapore
| | - Jung-Chih Chen
- Institute of Biomedical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan; Department of Electronics and Electrical Engineering, National Yang Ming Chiao Tung University, Hsinchu, Taiwan; Catholic Mercy Hospital, Catholic Mercy Medical Foundation, Hsinchu, Taiwan; Medical Device Innovation & Translation Centre, National Yang Ming Chiao Tung University, Taipei, Taiwan.
| | - Ching-Wei Tung
- Department of Materials Engineering, Ming Chi University of Technology, New Taipei City, Taiwan.
| | - Ren-Jei Chung
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan; High-value Biomaterials Research and Commercialization Center, National Taipei University of Technology (Taipei Tech), Taipei, Taiwan.
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5
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Nagappan S, Duraivel M, Han S, Yusuf M, Mahadadalkar M, Park K, Dhakshinamoorthy A, Prabakar K, Park S, Ha CS, Lee JM, Park KH. Electrocatalytic Oxygen Reduction Reaction of Graphene Oxide and Metal-Free Graphene in an Alkaline Medium. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:1315. [PMID: 37110898 PMCID: PMC10146927 DOI: 10.3390/nano13081315] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Revised: 04/04/2023] [Accepted: 04/06/2023] [Indexed: 06/19/2023]
Abstract
Graphene is a well-known two-dimensional material with a large surface area and is used for numerous applications in a variety of fields. Metal-free carbon materials such as graphene-based materials are widely used as an electrocatalyst for oxygen reduction reactions (ORRs). Recently, more attention has been paid to developing metal-free graphenes doped with heteroatoms such as N, S, and P as efficient electrocatalysts for ORR. In contrast, we found our prepared graphene from graphene oxide (GO) by the pyrolysis method under a nitrogen atmosphere at 900 °C has shown better ORR activity in aqueous 0.1 M potassium hydroxide solution electrolyte as compared with the electrocatalytic activity of pristine GO. At first, we prepared various graphene by pyrolysis of 50 mg and 100 mg of GO in one to three alumina boats and pyrolyzed the samples under a N2 atmosphere at 900 °C. The prepared samples are named G50-1B to 3B and G100-1B and G100-2B. The prepared GO and graphenes were also analyzed under various characterization techniques to confirm their morphology and structural integrity. The obtained results suggest that the ORR electrocatalytic activity of graphene may differ based on the pyrolysis conditions. We found that G100-1B (Eonset, E1/2, JL, and n values of 0.843, 0.774, 4.558, and 3.76) and G100-2B (Eonset, E1/2, and JL values of 0.837, 0.737, 4.544, and 3.41) displayed better electrocatalytic ORR activity, as did Pt/C electrode (Eonset, E1/2, and JL values of 0.965, 0.864, 5.222, and 3.71, respectively). These results display the wide use of the prepared graphene for ORR and also can be used for fuel cell and metal-air battery applications.
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Affiliation(s)
- Saravanan Nagappan
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.Y.); (M.M.); (K.P.)
| | - Malarkodi Duraivel
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.D.); (K.P.)
| | - SeongHoon Han
- Department of Physics, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (S.H.); (S.P.)
| | - Mohammad Yusuf
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.Y.); (M.M.); (K.P.)
| | - Manjiri Mahadadalkar
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.Y.); (M.M.); (K.P.)
| | - KyeongMun Park
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.Y.); (M.M.); (K.P.)
| | | | - Kandasamy Prabakar
- Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.D.); (K.P.)
| | - Sungkyun Park
- Department of Physics, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (S.H.); (S.P.)
| | - Chang-Sik Ha
- Department of Polymer Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea;
| | - Jae-Myung Lee
- Department of Naval Architecture and Ocean Engineering, Pusan National University, Busan 46241, Republic of Korea;
| | - Kang Hyun Park
- Department of Chemistry, Chemistry Institute for Functional Materials, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea; (M.Y.); (M.M.); (K.P.)
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Alangari A, Mateen A, Alqahtani MS, Shahid M, Syed R, Shaik MR, Khan M, Adil SF, Kuniyil M. Antimicrobial, anticancer, and biofilm inhibition studies of highly reduced graphene oxide (HRG): In vitro and in silico analysis. Front Bioeng Biotechnol 2023; 11:1149588. [PMID: 37025362 PMCID: PMC10071309 DOI: 10.3389/fbioe.2023.1149588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Accepted: 02/23/2023] [Indexed: 03/18/2023] Open
Abstract
Background: Bacterial infections and cancers may cause various acute or chronic diseases, which have become serious global health issues. This requires suitable alternatives involving novel and efficient materials to replace ineffective existing therapies. In this regard, graphene composites are being continuously explored for a variety of purposes, including biomedical applications, due to their remarkable properties. Methods: Herein, we explore, in-vitro, the different biological properties of highly reduced graphene oxide (HRG), including anti-cancer, anti-bacterial, and anti-biofilm properties. Furthermore, to analyze the interactions of graphene with proteins of microbes, in silico docking analysis was also carried out. To do this, HRG was prepared using graphene oxide as a precursor, which was further chemically reduced to obtain the final product. The as-prepared HRG was characterized using different types of microscopic and spectroscopic techniques. Results: The HRG revealed significant cytotoxic ability, using a dose-dependent anti-cell proliferation approach, which substantially killed human breast cancer cells (MCF-7) with IC50 of 29.51 ± 2.68 μg/mL. The HRG demonstrated efficient biological properties, i.e., even at low concentrations, HRG exhibited efficient anti-microbial properties against a variety of microorganisms. Among the different strains, Gram-positive bacteria, such as B. subtilis, MRSA, and S. aureus are more sensitive to HRG compared to Gram-negative bacteria. The bactericidal properties of HRG are almost similar to a commercially available effective antibiotic (ampicillin). To evaluate the efficacy of HRG against bacterial biofilms, Pseudomonas aeruginosa and MRSA were applied, and the results were compared with gentamycin and ampicillin, which are commonly applied standard antibiotics. Notably, HRG demonstrated high inhibition (94.23%) against P.aeruginosa, with lower MIC (50 μg/mL) and IC50 (26.53 μg/mL) values, whereas ampicillin and gentamicin showed similar inhibition (90.45% and 91.31% respectively) but much higher MIC and IC50 values. Conclusion: Therefore, these results reveal the excellent biopotential of HRG in different biomedical applications, including cancer therapy; antimicrobial activity, especially anti-biofilm activity; and other biomedicine-based therapies. Based on the molecular docking results of Binding energy, it is predicted that pelB protein and HRG would form the best stable docking complex, and high hydrogen and hydrophobic interactions between the pelB protein and HRG have been revealed. Therefore, we conclude that HRG could be used as an antibiofilm agent against P. aeruginosa infections.
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Affiliation(s)
- Abdulaziz Alangari
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Ayesha Mateen
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed S. Alqahtani
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mudassar Shahid
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Rabbani Syed
- Department of Pharmaceutics, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Mohammed Rafi Shaik
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mujeeb Khan
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Syed Farooq Adil
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Mufsir Kuniyil
- Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia
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Comparative study on the structural and electrochemical properties of nitrogen-doped and nitrogen and sulfur co-doped reduced graphene oxide electrode prepared by hydrothermal technique. Radiat Phys Chem Oxf Engl 1993 2023. [DOI: 10.1016/j.radphyschem.2023.110887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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8
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Kumaresan N, Alsalhi MS, Karuppasamy P, Praveen Kumar M, Pandian MS, Arulraj A, Peera SG, Mangalaraja R, Devanesan S, Ramasamy P, Murugadoss G. Nitrogen implanted carbon nanosheets derived from Acorus calamus as an efficient electrode for the supercapacitor application. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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9
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Kumaresan N, Karuppasamy P, Kumar MP, Peera SG, AlSalhi MS, Devanesan S, Mangalaraja R, Ramasamy P, de Oliveira TF, Murugadoss G. Synthesis and characterization of metal-free nanosheets of carbo-catalysts for bifunctional electrocatalyst towards HER and OER application. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
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10
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Assessment of Physicochemical, Anticancer, Antimicrobial, and Biofilm Activities of N-Doped Graphene. CRYSTALS 2022. [DOI: 10.3390/cryst12081035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nanomedicine has been used as a precise treatment for many diseases. The advantage of using nanodrugs is that they have more permeability and less toxicity to cells, which enhances the drug delivery system. Graphene is well known for its potential biological applications in drug, food, and pharma industries. This study aimed to assess the productivity and potentiality of nitrogen-doped graphene (NDG) and to evaluate their anticancer, antimicrobial, and biofilm inhibition activity. Nitrogen-doped graphene was synthesized by using a one-pot facile synthesis of NDG, wherein the NDG was prepared by the reduction of graphene oxide (GO) in the presence of hydrazine hydrate as a reducing agent, while ammonium hydroxide was used as a source of nitrogen on the surface of graphene. As-synthesized NDG was characterized by various characterization techniques such as UV-Vis, FT-IR, XRD, XPS, TEM, and N2 sorption studies analysis. Antimicrobial, anticancer, and biofilm inhibition assays were performed by standard protocols. N-doped graphene (NDG) showed better activity against Gram-positive bacteria, such as methicillin-resistant Staphylococcus aureus (MRSA), Bacillus subtillis, Streptococcus pneumoniae, and Streptococcus mutans (p ≤ 0.05), whereas there was no activity against Gram-negative strains in Klebsiella pneumoniae and Pseudomonas aeruginosa. Biofilm inhibition was also improved with NDG compared to the standard ampicillin. NDG showed better results in both MCF-7 and Hela cell lines with IC50 of 27.15 µg/mL and 30.85 µg/mL, respectively. In conclusion, NDG has the best ability for use as a biomolecule, and research studies focusing on proteomics, metabolomics, and in vivo studies are needed to increase the impact of NDG in the drug and pharma industry.
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Ma T, Liu M, Li T, Ren H, Zhou R. Nitrogen-doped carbon nanotubes derived from carbonized polyaniline as a robust peroxydisulfate activator for the oxidation removal of organic pollutants: Singlet oxygen dominated mechanism and structure-activity relationship. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.121124] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Bhunia P, Dutta K. Efficient electrocatalytic oxidation of NADH by highly dispersible
in situ N
‐doped ionic liquid‐functionalized graphene nanosheets. ELECTROCHEMICAL SCIENCE ADVANCES 2022. [DOI: 10.1002/elsa.202100050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
- Prasenjit Bhunia
- Department of Chemistry Silda Chandra Sekhar College Jhargram West Bengal 721515 India
| | - Kingshuk Dutta
- Advanced Polymer Design and Development Research Laboratory (APDDRL) School for Advanced Research in Petrochemicals (SARP) Central Institute of Petrochemicals Engineering and Technology (CIPET) Bengaluru Karnataka 562149 India
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Zehri A, Nylander A, Nilsson TMJ, Ye L, Fu Y, Liu J. Graphene Oxide and Nitrogen-Doped Graphene Coated Copper Nanoparticles in Water-Based Nanofluids for Thermal Management in Electronics. JOURNAL OF NANOFLUIDS 2022. [DOI: 10.1166/jon.2022.1816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Graphene oxide (GO) and nitrogen-doped graphene (NG) coated copper nanoparticles (NPs) have been developed in this work and investigated as nanofiller for water as Heat Transfer Fluids (HTFs). The morphology and composition of the coating were characterized to confirm the presence of
functional groups and the nitrogendoping of the graphene coating. Different fractions of the two types of coated nanoparticles NPs between 0.1 and 10 wt.% were dispersed in water. The thermal conductivity of the dispersions was evaluated at temperatures between 20 and 50 °C. A positive
correlation between the thermal conductivity of the HTFs and the fraction and temperature are observed as a result of the increase of the solid phase contribution into the heat transfer. At a concentration of 0.5 wt.%, the thermal conductivity of the NG-CuNPs nanofluid reached its maximum
increase of 78%, compared to a 13% increase in the case of GO-CuNPs. However, due to the poor stability of the NG-CuNPs, further increase of the solid phase did not result in any additional improvement. In contrast, the thermal conductivity of the GO-based dispersion resulted in a 103% enhancement
at 10 wt.% at a temperature of 50 °C.
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Affiliation(s)
- Abdelhafid Zehri
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-41296, Gothenburg, Sweden
| | - Andreas Nylander
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-41296, Gothenburg, Sweden
| | - Torbjörn M. J. Nilsson
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-41296, Gothenburg, Sweden
| | - Lilei Ye
- SHT Smart High-Tech AB, Kemivägen 6, SE 41258, Gothenburg, Sweden
| | - Yifeng Fu
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-41296, Gothenburg, Sweden
| | - Johan Liu
- Department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology, Kemivägen 9, SE-41296, Gothenburg, Sweden
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14
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Bhattacharya S, Das AA, Chandra Dhal G, Sahoo PK, Tripathi A, Sahoo NK. Evaluation of N doped rGO-ZnO-CoPc(COOH) 8 nanocomposite in cyanide degradation and its bactericidal activities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 302:114022. [PMID: 34735832 DOI: 10.1016/j.jenvman.2021.114022] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Revised: 09/25/2021] [Accepted: 10/25/2021] [Indexed: 06/13/2023]
Abstract
In the present study, an attempt has been made to design a solar light driven N-rGO-ZnO- CoPc(COOH)8 nanocomposite for the degradation of cyanide. The morphological and structural characterization of the synthesized nanocomposite was performed by XRD, FT-IR, XPS, UV-vis DRS, FESEM, TEM, EDS, PL spectra and BET surface area. The results revealed that almost 91% degradation and 86% toxicity removal occurred at 25 mgL-1 of initial cyanide concentration by the N-rGO-ZnO-CoPc(COOH)8 nanocomposite under illumination of solar light within 120 min. Analysis of free radicals reveals that the generation of OH. radicals was the predominant species in the photocatalytic degradation process. The cyanide degradation follows pseudo-first order kinetics. The estimated apparent rate constant (Kapp) of the above nanocomposite was 3 times higher than that of the ZnO photocatalyst alone together with a very good recycle activities. This might be due to the application of metallpthalocyanine photosensitizer CoPc(COOH)8 which enhances the rate of visible light absorption efficiency and activates the higher band gap ZnO photocatalyst under visible light. In addition, the presence of residual oxygen in N-rGO also promotes nucleation and anchor sites for interfacial contact between ZnO and N-rGO for effective charge transfer. Further, the N-rGO-ZnO-CoPc(COOH)8 photocatalytic system showed significant antibacterial activities against mixed culture systems. Therefore, the N-rGO-ZnO-CoPc(COOH)8 nanocomposite may be an alternative solar light driven photocatalyst system for the removal of cyanide from the wastewater along with its strong disinfectant activities.
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Affiliation(s)
- Shramana Bhattacharya
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India
| | - Anup Anang Das
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India
| | - Ganesh Chandra Dhal
- Department of Civil Engineering, National Institute of Technology, Meghalaya, India
| | - Prasanta Kumar Sahoo
- Department of Mechanical Engineering, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751 030, Odisha, India
| | - Abhishek Tripathi
- Department of Metallurgical and Materials Engineering, Malaviya National Institute of Technology Jaipur, Jaipur, 302017, India
| | - Naresh Kumar Sahoo
- Department of Chemistry, Environmental Science Program, Faculty of Engineering and Technology (ITER), Siksha'O'Anusandhan (Deemed to be University), Bhubaneswar, 751030, Odisha, India.
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15
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Yadav A, Kumar R, Sahoo B. Exploring supercapacitance of solvothermally synthesized N-rGO sheet: role of N-doping and the insight mechanism. Phys Chem Chem Phys 2022; 24:1059-1071. [PMID: 34927641 DOI: 10.1039/d1cp03694g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We demonstrate the method of achieving excellent supercapacitance in nitrogen-doped reduced graphene oxide (N-rGO) sheets by controlling the amount of N-content through the use of different ratios of GO and urea during solvothermal synthesis. Here, urea plays a dual role in reducing GO and simultaneously doping nitrogen into the GO flakes forming exfoliated N-rGO sheets. The nitrogen content in N-rGO samples rises with an increase in the amounts of urea and saturates at a value of ∼14% for the GO : urea ratios beyond 1 : 8. The obtained N-rGO sheets with ∼ 5% N-content (obtained for GO : urea ratio of 1 : 3) were demonstrated as excellent supercapacitor materials. Using a 3-electrode setup, the maximum specific capacitance obtained for this sample was 514 F g-1 at a current density of 0.5 A g-1 (mass normalized current). The insights into the origin of this excellent supercapacitive behavior are explained through our results on optimum N-content, the relative amount of different N-environments, defects/disorders, and the degree of reduction of GO. Importantly, a proper stacking of rGO sheets with moderate N-content (∼5-6%) and a moderate amount of defects is the key to achieve high specific-capacitance. Furthermore, our 2-electrode device demonstrates the excellence of our samples with a Csp of 237 F g-1, a power density of 225 W kg-1, and an energy density of 6.7 W h kg-1 at 0.5 A g-1, exhibiting a high cyclic constancy with high capacitive retention of ∼ 82% even after 8000 cycles. Hence, our work provides a way to control the properties of N-rGO in achieving excellent supercapacitive performance.
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Affiliation(s)
- Ankit Yadav
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
| | - Rajeev Kumar
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
| | - Balaram Sahoo
- Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
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16
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Witjaksono G, Junaid M, Khir MH, Ullah Z, Tansu N, Saheed MSBM, Siddiqui MA, Ba-Hashwan SS, Algamili AS, Magsi SA, Aslam MZ, Nawaz R. Effect of Nitrogen Doping on the Optical Bandgap and Electrical Conductivity of Nitrogen-Doped Reduced Graphene Oxide. Molecules 2021; 26:6424. [PMID: 34770833 PMCID: PMC8588234 DOI: 10.3390/molecules26216424] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/29/2021] [Accepted: 08/31/2021] [Indexed: 11/16/2022] Open
Abstract
Graphene as a material for optoelectronic design applications has been significantly restricted owing to zero bandgap and non-compatible handling procedures compared with regular microelectronic ones. In this work, nitrogen-doped reduced graphene oxide (N-rGO) with tunable optical bandgap and enhanced electrical conductivity was synthesized via a microwave-assisted hydrothermal method. The properties of the synthesized N-rGO were determined using XPS, FTIR and Raman spectroscopy, UV/vis, as well as FESEM techniques. The UV/vis spectroscopic analysis confirmed the narrowness of the optical bandgap from 3.4 to 3.1, 2.5, and 2.2 eV in N-rGO samples, where N-rGO samples were synthesized with a nitrogen doping concentration of 2.80, 4.53, and 5.51 at.%. Besides, an enhanced n-type electrical conductivity in N-rGO was observed in Hall effect measurement. The observed tunable optoelectrical characteristics of N-rGO make it a suitable material for developing future optoelectronic devices at the nanoscale.
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Affiliation(s)
- Gunawan Witjaksono
- BRI Institute, Jl. Harsono RM No. 2, Ragunan, Jakarta 12550, Passsar Minggu, Indonesia
| | - Muhammad Junaid
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
- Department of Electronic Engineering, Balochistan University of Information Technology, Engineering and Management Sciences, Quetta 87300, Balochistan, Pakistan
| | - Mohd Haris Khir
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Zaka Ullah
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Nelson Tansu
- School of Electrical and Electronic Engineering, The University of Adelaide, Adelaide, SA 5005, Australia;
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, SA 5005, Australia
| | | | - Muhammad Aadil Siddiqui
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Saeed S. Ba-Hashwan
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Abdullah Saleh Algamili
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Saeed Ahmed Magsi
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Muhammad Zubair Aslam
- Department of Electrical and Electronic Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; (M.H.K.); (Z.U.); (M.A.S.); (S.S.B.-H.); (A.S.A.); (S.A.M.); (M.Z.A.)
| | - Rab Nawaz
- Department of Fundamental Science, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia; or
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17
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Noor S, Sajjad S, Leghari SAK, Flox C, Ahmad S. Competitive role of nitrogen functionalities of N doped GO and sensitizing effect of Bi 2O 3 QDs on TiO 2 for water remediation. J Environ Sci (China) 2021; 108:107-119. [PMID: 34465425 DOI: 10.1016/j.jes.2021.02.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 02/07/2021] [Accepted: 02/08/2021] [Indexed: 06/13/2023]
Abstract
The promising solar irradiated photocatalyst by pairing of bismuth oxide quantum dots (BQDs) doped TiO2 with nitrogen doped graphene oxide (NGO) nanocomposite (NGO/BQDs-TiO2) was fabricated. It was used for degradation of organic pollutants like 2,4-dichlorophenol (2,4-DCP) and stable dyes, i.e. Rhodamine B and Congo Red. X-ray diffraction (XRD) profile of NGO showed reduction in oxygenic functional groups and restoring of graphitic crystal structure. The characteristic diffraction peaks of TiO2 and its composites showed crystalline anatase TiO2. Morphological images represent spherical shaped TiO2 evenly covered with BQDs spread on NGO sheet. The surface linkages of NO-O-Ti, C-O-Ti, Bi-O-Ti and vibrational modes are observed by Fourier transform infrared spectroscopy (FTIR) and Raman studies. BQDs and NGO modified TiO2 results into red shifting in visible region as studied in diffused reflectance spectroscopy (DRS). NGO and BQDs in TiO2 are linked with defect centers which reduced the recombination of free charge carriers by quenching of photoluminescence (PL) intensities. X-ray photoelectron spectroscopy (XPS) shows that no peak related to C-O in NGO/BQDs-TiO2 is observed. This indicated that doping of nitrogen into GO has reduced some oxygen functional groups. Nitrogen functionalities in NGO and photosensitizing effect of BQDs in ternary composite have improved photocatalytic activity against organic pollutants. Intermediate byproducts during photo degradation process of 2,4-DCP were studied through high performance liquid chromatography (HPLC). Study of radical scavengers indicated that O2·- has significant role for degradation of 2,4-DCP. Our investigations propose that fabricated nanohybrid architecture has potential for degradation of environmental pollutions.
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Affiliation(s)
- Saima Noor
- International Islamic University, Islamabad 44000, Pakistan; Department of Chemistry and Materials Science, Aalto University, Espoo 16100, Fl-00076, Finland
| | - Shamaila Sajjad
- International Islamic University, Islamabad 44000, Pakistan.
| | | | - Cristina Flox
- Department of Chemistry and Materials Science, Aalto University, Espoo 16100, Fl-00076, Finland
| | - Saeed Ahmad
- Department of Applied Physics, Aalto University, Espoo 15100, Fl-00076, Finland
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18
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Ramesh S, Karuppasamy K, Vikraman D, Kim E, Sanjeeb L, Lee YJ, Kim HS, Kim JH, Kim HS. Hierarchical Co3O4 decorated nitrogen-doped graphene oxide nanosheets for energy storage and gas sensing applications. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.06.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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19
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Facile and economic synthesis of heteroatoms co-doped graphene using garlic biomass as a highly stable electrocatalyst toward 4 e− ORR. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2021. [DOI: 10.1007/s13738-021-02306-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Hamed A, Hessein A, Abd El-Moneim A. Towards high performance flexible planar supercapacitors: In-situ laser scribing doping and reduction of graphene oxide films. APPLIED SURFACE SCIENCE 2021; 551:149457. [DOI: 10.1016/j.apsusc.2021.149457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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21
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Todankar B, Desai P, Ranade AK, Narayanan TN, Tanemura M, Kalita G. Trifunctional Electrocatalytic Activities of Nitrogen‐Doped Graphitic Carbon Nanofibers Synthesized by Chemical Vapor Deposition. ChemistrySelect 2021. [DOI: 10.1002/slct.202101068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Bhagyashri Todankar
- Department of Physical Science and Engineering Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Pradeep Desai
- Department of Physical Science and Engineering Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Ajinkya K. Ranade
- Department of Physical Science and Engineering Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Tharangattu N. Narayanan
- Tata Institute of Fundamental Research-Hyderabad Sy. No. 36/P Gopanpally Hyderabad Telangana 500046 India
| | - Masaki Tanemura
- Department of Physical Science and Engineering Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Golap Kalita
- Department of Physical Science and Engineering Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
- Frontier Research Institute for Material Science Nagoya Institute of Technology, Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
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22
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Raut S, Shinde NM, Nakate YT, Ghule BG, Gore SK, Shaikh SF, Pak JJ, Al-Enizi AM, Mane RS. Coconut-Water-Mediated Carbonaceous Electrode: A Promising Eco-Friendly Material for Bifunctional Water Splitting Application. ACS OMEGA 2021; 6:12623-12630. [PMID: 34056413 PMCID: PMC8154170 DOI: 10.1021/acsomega.1c00641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
The organic and eco-friendly materials are extended to prevail over the worldwide energy crisis where bio-inspired carbonaceous electrode materials are being prepared from biogenic items and wastes. Here, coconut water is sprayed over three-dimensional (3D) nickel foam for obtaining a carbonaceous electrode material, i.e., C@Ni-F. The as-prepared C@Ni-F electrode has been used for structural elucidation and morphology evolution studies. Field emission scanning electron microscopy analysis confirms the vertically grown nanosheets of the C@Ni-F electrode, which is further employed in the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), where excellent OER and HER performances with small overpotentials of 219 and 122 mV and with stumpy Tafel slopes, i.e., 27 and 53 mV dec-1, are respectively obtained, suggesting a bifunctional potential of the sprayed electrode material. Moreover, sustainable bifunctional performance of C@Ni-F proves considerable chemical stability and moderate mechanical robustness against long-term operation, suggesting that, in addition to being a healthy drink to mankind, coconut water can also be used for water splitting applications.
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Affiliation(s)
- Siddheshwar
D. Raut
- School
of Physical Sciences, Swami Ramanand Teerth
Marathwada University, Nanded 431501, Maharashtra, India
| | - Nanasaheb M. Shinde
- School
of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Yogesh T. Nakate
- Department
of Electronics, Kavayitri Bahinabai Chaudhari
North Maharashtra University, Jalgaon 425001, Maharashtra, India
| | - Balaji G. Ghule
- School
of Physical Sciences, Swami Ramanand Teerth
Marathwada University, Nanded 431501, Maharashtra, India
| | - Shyam K. Gore
- Dnyanopasak
Shikshan Mandal’s Arts, Commerce and Science College, Jintur 431509, India
| | - Shoyebmohamad F. Shaikh
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - James J. Pak
- School
of Electrical Engineering, Korea University, Seoul 02841, Republic of Korea
| | - Abdullah M. Al-Enizi
- Department
of Chemistry, College of Science, King Saud
University, Riyadh 11451, Saudi Arabia
| | - Rajaram S. Mane
- School
of Physical Sciences, Swami Ramanand Teerth
Marathwada University, Nanded 431501, Maharashtra, India
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23
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Kiani D, Baltrusaitis J. Immobilization and activation of cobalt-amine catalyst on NH4OH-treated activated carbon for ethylene dimerization. Catal Today 2021. [DOI: 10.1016/j.cattod.2020.04.062] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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24
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Kuniyil M, Shanmukha Kumar J, Adil SF, Assal ME, Shaik MR, Khan M, Al-Warthan A, Siddiqui MRH. Production of biodiesel from waste cooking oil using ZnCuO/N-doped graphene nanocomposite as an efficient heterogeneous catalyst. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2020.102982] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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25
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Pandian PM, Pandurangan A. Enhanced electrostatic potential with high energy and power density of a symmetric and asymmetric solid-state supercapacitor of boron and nitrogen co-doped reduced graphene nanosheets for energy storage devices. NEW J CHEM 2021. [DOI: 10.1039/d1nj00486g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Schematic representation of boron and nitrogen co-doped graphene nanosheets.
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Affiliation(s)
- P. Muthu Pandian
- Department of Chemistry
- Anna University
- Guindy Campus
- Chennai – 25
- India
| | - A. Pandurangan
- Department of Chemistry
- Anna University
- Guindy Campus
- Chennai – 25
- India
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26
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Pan SX, Xie TZ, Xiao TF, Xie JH. Extensive removal of thallium by graphene oxide functionalized with aza-crown ether. RSC Adv 2020; 10:44470-44480. [PMID: 35517178 PMCID: PMC9059138 DOI: 10.1039/d0ra09193f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022] Open
Abstract
Thallium (Tl) is a highly toxic heavy metal, and its pollution and remediation in aquatic environments has attracted considerable attention. To reduce or remove Tl pollution in the environment, various strategies have been applied. Graphene oxide (GO) has abundant oxygen-containing functional groups, indicating its high application potential for pollution remediation via methods involving binding to metal ions or positively charged organic molecules or electrostatic interaction and coordination. However, the adsorption of Tl to GO occurs via physical adsorption, for which the adsorption efficiency is low. Therefore, herein, we report a new method to effectively remove Tl pollution in water. We combined GO with aza-crown ether, which enhanced the electronegativity and ability to bind metal ions. The functionalized graphene oxide (FGO) demonstrated high efficiency through a wide pH gradient of 5-10, with a dominant Tl(i) adsorption capacity (112.21 mg g-1) based on the Langmuir model (pH 9.0, adsorbent concentration of 0.8 g L-1). The adsorption of Tl(i) during removal fit a pseudo-second-order kinetic model well. The mechanisms of Tl removal involve physical and chemical adsorption. In summary, our study provides a new method for the detection and treatment of Tl-containing wastewater by using FGO.
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Affiliation(s)
- Shu-Xin Pan
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University Guangzhou 510006 China
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Ting-Zheng Xie
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University Guangzhou 510006 China
- Institute of Environmental Research at Greater Bay, Guangzhou University Guangzhou 510006 China
| | - Tang-Fu Xiao
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University Guangzhou 510006 China
- School of Environmental Science and Engineering, Guangzhou University Guangzhou 510006 China
| | - Jie-Hui Xie
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University Guangzhou 510006 China
- Institute of Environmental Research at Greater Bay, Guangzhou University Guangzhou 510006 China
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27
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Preparation of single-layer graphene based on a wet chemical synthesis route and the effect on electrochemical properties by double layering surface functional groups to modify graphene oxide. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.137053] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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28
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Jang W, Yun J, Seo Y, Byun H, Hou J, Kim JH. Mixed Dye Removal Efficiency of Electrospun Polyacrylonitrile-Graphene Oxide Composite Membranes. Polymers (Basel) 2020; 12:E2009. [PMID: 32899232 PMCID: PMC7563693 DOI: 10.3390/polym12092009] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/28/2020] [Accepted: 08/31/2020] [Indexed: 11/16/2022] Open
Abstract
Exfoliated graphene oxide (GO) was reliably modified with a cetyltrimethylammonium chloride (CTAC) surfactant to greatly improve the dispersity of the GO in a polyacrylonitrile (PAN) polymer precursor solution. Subsequent electrospinning of the mixture readily resulted in the formation of GO-PAN composite nanofibers containing up to 30 wt % of GO as a filler without notable defects. The absence of common electrospinning problems associated with clogging and phase separation indicated the systematic and uniform integration of the GO within the PAN nanofibers beyond the typical limits. After thoroughly examining the formation and maximum loading efficiency of the modified GO in the PAN nanofibers, the resulting composite nanofibers were thermally treated to form membrane-type sheets. The wettability and pore properties of the composite membranes were notably improved with respect to the pristine PAN nanofiber membrane, possibly due to the reinforcing filler effect. In addition, the more GO loaded into the PAN nanofiber membranes, the higher the removal ability of the methylene blue (MB) and methyl red (MR) dyes in the aqueous system. The adsorption kinetics of a mixed dye solution were also monitored to understand how these MB and MR dyes interact differently with the composite nanofiber membranes. The simple surface modification of the fillers greatly facilitated the integration efficiency and improved the ability to control the overall physical properties of the nanofiber-based membranes, which highly impacted the removal performance of various dyes from water.
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Affiliation(s)
- Wongi Jang
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, USA; (W.J.); (J.Y.)
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea; (Y.S.); (H.B.)
| | - Jaehan Yun
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, USA; (W.J.); (J.Y.)
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea; (Y.S.); (H.B.)
| | - Younggee Seo
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea; (Y.S.); (H.B.)
| | - Hongsik Byun
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea; (Y.S.); (H.B.)
| | - Jian Hou
- Department of Chemical Engineering, Keimyung University, Daegu 42601, Korea; (Y.S.); (H.B.)
| | - Jun-Hyun Kim
- Department of Chemistry, Illinois State University, Normal, IL 61790-4160, USA; (W.J.); (J.Y.)
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Shen Q, Lin Y, Kawabata Y, Jia Y, Zhang P, Akther N, Guan K, Yoshioka T, Shon H, Matsuyama H. Engineering Heterostructured Thin-Film Nanocomposite Membrane with Functionalized Graphene Oxide Quantum Dots (GOQD) for Highly Efficient Reverse Osmosis. ACS APPLIED MATERIALS & INTERFACES 2020; 12:38662-38673. [PMID: 32693571 DOI: 10.1021/acsami.0c10301] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
In this study, custom-tailored graphene oxide quantum dots (GOQD) were synthesized as functional nanofillers to be embedded into the polyamide (PA) membrane for reverse osmosis (RO) via interfacial polymerization (IP). The heterostructured interface-functionalization of amine/sulfonic decoration on GOQD (N/S-d-GOQD) takes place via the tuning of the molecular design. The embedded N/S-d-GOQD inside the PA matrix contributes to facilitating water molecules quick transport due to the more accessible capturing sites with higher internal polarity, achieving a nearly 3-fold increase in water permeance when compared to the pristine thin-film composite (TFC) membrane. Covalent bonding between the terminal amine groups and the acyl chloride of trimesoyl chloride (TMC) enables the formation of an amplified selective layer, while the sulfonic part assists in maintaining a robust membrane surface negative charge, thus remarkably improving the membrane selectivity toward NaCl. As a result, the newly developed TFN membrane performed remarkably high water permeance up to 5.89 L m-2 h-1 bar-1 without the compromising of its favorable salt (NaCl) rejection ratio of 97.1%, revealing a comparably high separation property when comparing to the state-of-the-art RO membranes, and surpassing the permeability-selectivity trade-off limits. Furthermore, we systematically investigated the GOQDs with different surface decorations but similar configurations (including 3 different nanofillers of pristine GOQD, amine decorated GOQD (N-d-GOQD), and N/S-d-GOQD) to unveil the underlying mechanisms of the swing effects of internal geometry and polarity of the embedded nanofillers on contributing to the uptake, and/or release of aqueous molecules within TFN membranes, providing a fundamental perspective to investigate the impact of embedded nanofillers on the formation of an IP layer and the overall transporting behavior of the RO process.
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Affiliation(s)
- Qin Shen
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Yuqing Lin
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Yuki Kawabata
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Yuandong Jia
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Pengfei Zhang
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Nawshad Akther
- School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia
| | - Kecheng Guan
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Tomohisa Yoshioka
- Research Center for Membrane and Film Technology, Department of Chemical Science and Engineering, Kobe University, Kobe 657-8501, Japan
| | - Hokyong Shon
- School of Civil and Environmental Engineering, University of Technology Sydney (UTS), Sydney, NSW 2007, Australia
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Thiruppathi AR, Sidhureddy B, Boateng E, Soldatov DV, Chen A. Synthesis and Electrochemical Study of Three-Dimensional Graphene-Based Nanomaterials for Energy Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1295. [PMID: 32630248 PMCID: PMC7408301 DOI: 10.3390/nano10071295] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 06/27/2020] [Accepted: 06/28/2020] [Indexed: 12/12/2022]
Abstract
Graphene is an attractive soft material for various applications due to its unique and exclusive properties. The processing and preservation of 2D graphene at large scales is challenging due to its inherent propensity for layer restacking. Three-dimensional graphene-based nanomaterials (3D-GNMs) preserve their structures while improving processability along with providing enhanced characteristics, which exhibit some notable advantages over 2D graphene. This feature article presents recent trends in the fabrication and characterization of 3D-GNMs toward the study of their morphologies, structures, functional groups, and chemical compositions using scanning electron microscopy, X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy, and X-ray photoelectron spectroscopy. Owing to the attractive properties of 3D-GNMs, which include high surface areas, porous structures, improved electrical conductivity, high mechanical strength, and robust structures, they have generated tremendous interest for various applications such as energy storage, sensors, and energy conversion. This article summarizes the most recent advances in electrochemical applications of 3D-GNMs, pertaining to energy storage, where they can serve as supercapacitor electrode materials and energy conversion as oxygen reduction reaction catalysts, along with an outlook.
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Affiliation(s)
| | | | | | | | - Aicheng Chen
- Department of Chemistry, University of Guelph, Guelph, ON N1G 2W1, Canada; (A.R.T.); (B.S.); (E.B.); (D.V.S.)
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Ida S, Wilson P, Neppolian B, Sathish M, Mahammed Shaheer AR, Ravi P. Tuning the type of nitrogen on N-RGO supported on N-TiO 2 under ultrasonication/hydrothermal treatment for efficient hydrogen evolution - A mechanistic overview. ULTRASONICS SONOCHEMISTRY 2020; 64:104866. [PMID: 31983561 DOI: 10.1016/j.ultsonch.2019.104866] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 11/04/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
Efficient hydrogen production through water splitting has been the challenging task to be achieved in the present context of energy crisis. Among the various catalysts employed, nitrogen doped Titanium dioxide/Reduced graphene oxide (N-TiO2/RGO) nanocomposite has been established to be a promising photocatalytic material for this purpose. However, nuances of doping nitrogen on TiO2 and the type of nitrogen (pyridinic, pyrrolic and graphitic) stabilized on RGO responsible for facilitating the H2 production has not yet been addressed mechanistically. In the present investigation, an attempt has been made to synthesise N-Titanium dioxide/N-Reduced graphene oxide (NTNG) nanocomposite under ultrasonication followed by hydrothermal treatment. A stainlesssteel ultrasonic bath, of 6.5 L tank size (LxBxH) 300 × 150 × 150 mm, was used for ultrasonic treatments. The transducers located at the bottom of the ultrasonic bath generate a frequency of 40 kHz with maximum power of 200 W. A mechanism has been proposed including the nuances of formation and the stabilisation of each type of nitrogen on N-RGO as a function of ultrasonication time. The present work supports the stabilization of a given type of nitrogen on RGO through keto enol tautomerism. XPS and FTIR studies have been undertaken to identify the different types of nitrogen doping and the presence of functional groups respectively. XRD, UV-Vis DRS and PL investigations have been made to establish morphological profile and band gap structure of the nanocomposite. It was observed that pyrrolic type nitrogen stabilized on N-RGO augments the efficiency of photocatalytic activity through hydrogen production by water splitting.
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Affiliation(s)
- S Ida
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai 600005, Tamil Nadu, India
| | - P Wilson
- Department of Chemistry, Madras Christian College (Autonomous), University of Madras, Chennai 600005, Tamil Nadu, India.
| | - B Neppolian
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - M Sathish
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
| | - A R Mahammed Shaheer
- SRM Research Institute, SRM University, Kattankulathur, Chennai 603203, Tamil Nadu, India
| | - P Ravi
- Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi 630003, Tamilnadu, India
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32
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Domga, Karnan M, Oladoyinbo F, Noumi GB, Tchatchueng JB, Sieliechi MJ, Sathish M, Pattanayak DK. A simple, economical one-pot microwave assisted synthesis of nitrogen and sulfur co-doped graphene for high energy supercapacitors. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.135999] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Chauque S, Braga AH, Gonçalves RV, Rossi LM, Torresi RM. Enhanced Energy Storage of Fe
3
O
4
Nanoparticles Embedded in N‐Doped Graphene. ChemElectroChem 2020. [DOI: 10.1002/celc.202000134] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Susana Chauque
- Departamento de Quimica Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes 748 05508-000 São Paulo SP) Brazil
| | - Adriano H. Braga
- Departamento de Quimica Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes 748 05508-000 São Paulo SP) Brazil
| | - Renato V. Gonçalves
- Instituto de Física Universidade de São Paulo CP 369 13560-970 SãoCarlos São Paulo Brazil
| | - Liane M. Rossi
- Departamento de Quimica Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes 748 05508-000 São Paulo SP) Brazil
| | - Roberto M. Torresi
- Departamento de Quimica Fundamental Instituto de Química Universidade de São Paulo Av. Prof. Lineu Prestes 748 05508-000 São Paulo SP) Brazil
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34
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Nitrogen doped graphene/CuCr2O4 nanocomposites for supercapacitors application: Effect of nitrogen doping on coulombic efficiency. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2019.135368] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Maouche C, Zhou Y, Peng J, Wang S, Sun X, Rahman N, Yongphet P, Liu Q, Yang J. A 3D nitrogen-doped graphene aerogel for enhanced visible-light photocatalytic pollutant degradation and hydrogen evolution. RSC Adv 2020; 10:12423-12431. [PMID: 35497623 PMCID: PMC9051223 DOI: 10.1039/d0ra01630f] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Accepted: 03/11/2020] [Indexed: 12/21/2022] Open
Abstract
The synergistic effect of the 3D structure and N-doping explain the high surface area of 536 m2 g−1 and excellent photocatalytic activity.
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Affiliation(s)
- Chanez Maouche
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Yazhou Zhou
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Jinjun Peng
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Shuang Wang
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Xiujuan Sun
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Nasir Rahman
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Piyaphong Yongphet
- School of Energy and Power Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Qinqin Liu
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Juan Yang
- School of Materials Science and Engineering
- Jiangsu University
- Zhenjiang
- P. R. China
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Bharathi G, Nataraj D, Premkumar S, Saravanan P, Thangadurai DT, Khyzhun OY, Senthilkumar K, Kathiresan R, Kolandaivel P, Gupta M, Phase D. Insight into the photophysics of strong dual emission (blue & green) producing graphene quantum dot clusters and their application towards selective and sensitive detection of trace level Fe3+ and Cr6+ ions. RSC Adv 2020; 10:26613-26630. [PMID: 35515801 PMCID: PMC9055443 DOI: 10.1039/d0ra04549g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 06/29/2020] [Indexed: 01/20/2023] Open
Abstract
Graphene-nanostructured systems, such as graphene quantum dots (GQDs), are well known for their interesting light-emitting characteristics and are being applied to a variety of luminescence-based applications. The emission properties of GQDs are complex. Therefore, understanding the science of the photophysics of coupled quantum systems (like quantum clusters) is still challenging. In this regard, we have successfully prepared two different types of GQD clusters, and explored their photophysical properties in detail. By co-relating the structure and photophysics, it was possible to understand the emission behavior of the cluster in detail. This gave new insight into understanding the clustering effect on the emission behaviour. The results clearly indicated that although GQDs are well connected, the local discontinuity in the structure prohibits the dynamics of photoexcited charge carriers going from one domain to another. Therefore, an excitation-sensitive dual emission was possible. Emission yield values of about 18% each were recorded at the blue and green emission wavelengths at a particular excitation energy. This meant that the choice of emission color was decided by the excitation energy. Through systematic analysis, it was found that both intrinsic and extrinsic effects contributed to the blue emission, whereas only the intrinsic effect contributed to the green emission. These excitation-sensitive dual emissive GQD clusters were then used to sense Fe3+ and Cr6+ ions in the nanomolar range. While the Cr6+ ions were able to quench both blue and green emissions, the Fe3+ ions quenched blue emission only. The insensitivity of the Fe3+ ions in the quenching of the green emission was also understood through quantum chemical calculations. Schematic representation for the origin of blue and green emissions, and the resultant PL emission spectra from the GQD interconnected cluster-type sample.![]()
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Affiliation(s)
- Ganapathi Bharathi
- Quantum Materials & Energy Devices (QM-ED) Laboratory
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | - Devaraj Nataraj
- Quantum Materials & Energy Devices (QM-ED) Laboratory
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | - Sellan Premkumar
- Quantum Materials & Energy Devices (QM-ED) Laboratory
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | | | - Daniel T. Thangadurai
- Department of Nanoscience and Technology
- Sri Ramakrishana Engineering College, Affiliated to Anna University
- Coimbatore – 641 022
- India
| | - Oleg Yu Khyzhun
- Department of Structural Chemistry of Solids
- Frantsevych Institute for Problems of Materials Science
- National Academy of Sciences of Ukraine
- UA-03142 Kyiv
- Ukraine
| | - Kittusamy Senthilkumar
- UGC-CPEPA Centre for Advanced Studies in Physics for the Development of Solar Energy Materials and Devices
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | - Ramasamy Kathiresan
- Macromolecular Laboratory
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | - Ponmalai Kolandaivel
- Macromolecular Laboratory
- Department of Physics
- Bharathiar University
- Coimbatore
- India
| | - Mukul Gupta
- UGC-DAE Consortium for Scientific Research
- Indore
- India
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Tanguy NR, N'Diaye J, Arjmand M, Lian K, Yan N. Facile one-pot synthesis of water-dispersible phosphate functionalized reduced graphene oxide toward high-performance energy storage devices. Chem Commun (Camb) 2020; 56:1373-1376. [PMID: 31909400 DOI: 10.1039/c9cc07613a] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phosphate functionalized carbon nanomaterials have attracted significant attention because of their potential applications in energy storage applications. Herein we report a facile one-pot method to prepare water dispersible phosphate functionalized reduced graphene oxide and demonstrate the potential of the novel materials for energy storage applications. The synthesis method shows promise to promote a wider adoption of reduced graphene oxide for high performance applications.
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Affiliation(s)
- Nicolas R Tanguy
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, 200 College Street, Toronto, ON M5S 3E5, Canada.
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38
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Kaushal S, Kaur M, Kaur N, Kumari V, Singh PP. Heteroatom-doped graphene as sensing materials: a mini review. RSC Adv 2020; 10:28608-28629. [PMID: 35520086 PMCID: PMC9055927 DOI: 10.1039/d0ra04432f] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 07/14/2020] [Indexed: 11/21/2022] Open
Abstract
Graphene is one of the astounding recent advancements in current science and one of the most encouraging materials for application in cutting-edge electronic gadgets. Graphene and its derivatives like graphene oxide and reduced graphene oxide have emerged as significant nanomaterials in the area of sensors. Furthermore, doping of graphene and its derivatives with heteroatoms (B, N, P, S, I, Br, Cl and F) alters their electronic and chemical properties which are best suited for the construction of economical sensors of practical utility. This review recapitulates the developments in graphene materials as emerging electrochemical, ultrasensitive explosive, gas, glucose and biological sensors for various molecules with greater sensitivity, selectivity and a low limit of detection. Apart from the most important turn of events, the properties and incipient utilization of the ever evolving family of heteroatom-doped graphene are also discussed. This review article encompasses a wide range of heteroatom-doped graphene materials as sensors for the detection of NH3, NO2, H2O2, heavy metal ions, dopamine, bleomycinsulphate, acetaminophen, caffeic acid, chloramphenicol and trinitrotoluene. In addition, heteroatom-doped graphene materials were also explored for sensitivity and selectivity with respect to interfering analytes present in the system. Finally, the review article concludes with future perspectives for the advancement of heteroatom-doped graphene materials. Graphene is one of the astounding recent advancements in current science and one of the most encouraging materials for application in cutting-edge electronic gadgets.![]()
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Affiliation(s)
- Sandeep Kaushal
- Department of Chemistry
- Sri Guru Granth Sahib World University
- India
| | - Manpreet Kaur
- Department of Chemistry
- Sri Guru Granth Sahib World University
- India
| | - Navdeep Kaur
- Department of Chemistry
- Sri Guru Granth Sahib World University
- India
| | - Vanita Kumari
- Department of Chemistry
- Sri Guru Granth Sahib World University
- India
| | - Prit Pal Singh
- Department of Chemistry
- Sri Guru Granth Sahib World University
- India
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39
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Effect of Doping Temperatures and Nitrogen Precursors on the Physicochemical, Optical, and Electrical Conductivity Properties of Nitrogen-Doped Reduced Graphene Oxide. MATERIALS 2019; 12:ma12203376. [PMID: 31623130 PMCID: PMC6829554 DOI: 10.3390/ma12203376] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 09/26/2019] [Accepted: 10/05/2019] [Indexed: 11/30/2022]
Abstract
The greatest challenge in graphene-based material synthesis is achieving large surface area of high conductivity. Thus, tuning physico-electrochemical properties of these materials is of paramount importance. An even greater problem is to obtain a desired dopant configuration which allows control over device sensitivity and enhanced reproducibility. In this work, substitutional doping of graphene oxide (GO) with nitrogen atoms to induce lattice–structural modification of GO resulted in nitrogen-doped reduced graphene oxide (N-rGO). The effect of doping temperatures and various nitrogen precursors on the physicochemical, optical, and conductivity properties of N-rGO is hereby reported. This was achieved by thermal treating GO with different nitrogen precursors at various doping temperatures. The lowest doping temperature (600 °C) resulted in less thermally stable N-rGO, yet with higher porosity, while the highest doping temperature (800 °C) produced the opposite results. The choice of nitrogen precursors had a significant impact on the atomic percentage of nitrogen in N-rGO. Nitrogen-rich precursor, 4-nitro-ο-phenylenediamine, provided N-rGO with favorable physicochemical properties (larger surface area of 154.02 m2 g−1) with an enhanced electrical conductivity (0.133 S cm−1) property, making it more useful in energy storage devices. Thus, by adjusting the doping temperatures and nitrogen precursors, one can tailor various properties of N-rGO.
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40
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Vanyorek L, Muránszky G, Fiser B, Sikora E, Hutkai ZG, Viskolcz B. Adsorption capacity of oxidized nitrogen-doped bamboo-like carbon nanotubes. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1637757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- László Vanyorek
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
| | - Gábor Muránszky
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
| | - Béla Fiser
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
- Ferenc Rákóczi II. Transcarpathian Hungarian Institute, Beregszász, Transcarpathia, Ukraine
| | - Emőke Sikora
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
| | - Zsuzsanna G. Hutkai
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
| | - Béla Viskolcz
- Institute of Chemistry, University of Miskolc, Miskolc-Egyetemváros, Hungary
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41
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Peng P, Li L, He P, Zhu Y, Fu J, Huang Y, Guo W. One-step selective laser patterning of copper/graphene flexible electrodes. NANOTECHNOLOGY 2019; 30:185301. [PMID: 30641487 DOI: 10.1088/1361-6528/aafe4c] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Flexible electrodes have attracted much attention in consumer electronic applications. In this work, laser direct writing is used to fabricate copper/graphene composite electrodes on a flexible substrate in one step. This direct writing process with a low power laser can reduce copper ions in thin films to form copper nanomaterials and spontaneously interconnect them to gain good conductivity, while the laser also induces the growth of multi-layer graphene that coats on copper to improve the oxidation resistance of electrodes. The electrical performance and chemical composition of flexible electrodes can be tuned by laser power, scanning speed, and defocus distance. A mechanism of in situ reduction and interconnection of copper nanomaterials during laser direct writing has been proposed. This method could largely reduce the oxidation issue by avoiding synthesis and sintering processes of copper nanomaterials. These as-written copper electrodes have good stability and have potential applications in flexible electronics, such as flexible heaters or antennas as demonstrated.
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Affiliation(s)
- Peng Peng
- School of Mechanical Engineering and Automation, Beihang University, Beijing 100191, People's Republic of China. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, People's Republic of China
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42
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5-Fluorouracil and curcumin co-encapsulated chitosan/reduced graphene oxide nanocomposites against human colon cancer cell lines. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02734-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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43
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Sharma K, Hui D, Kim NH, Lee JH. Facile synthesis of N-doped graphene supported porous cobalt molybdenum oxynitride nanodendrites for the oxygen reduction reaction. NANOSCALE 2019; 11:1205-1216. [PMID: 30601506 DOI: 10.1039/c8nr06780e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Exploring an inexpensive, active and stable electrocatalyst as an alternative to expensive Pt for the oxygen reduction reaction (ORR), porous Co-Mo-ON alloy nanodendrites supported on nitrogen-doped graphene (Co-Mo-ON/NG) have been synthesized by a two-step solid state heating method. The Co-Mo-ON/NG nanodendrites offer high ORR activity and superior electrochemical stability both in acidic and alkaline media. This superiority is due to the synergistic effect of NG, enhanced catalytic efficiency by Mo, highly active intrinsic surface area and exposure of catalytic facets of nanodendritic morphology towards the ORR. The Co-Mo-ON/NG nanodendrites show a 4e- ORR process with 0.710 V and 0.915 V onset potentials in 0.5 M H2SO4 and 0.1 M KOH, respectively. The Co-Mo-ON/NG nanodendrites show extreme electrochemical stability in terms of 96% and 97% current retention for 40 000 s in both acidic and alkaline media, respectively, long term durability for continuous 2000 cycles and greater resistance to methanol than the commercial Pt/C catalyst. Furthermore, Mo-ON/NG, Co-ON/NG, and Co-Mo-ON are also tested to evaluate the effect of Mo-doping and NG on the electrocatalytic activity of Co-Mo-ON/NG nanodendrites. Owing to their low cost, easy synthesis, outstanding ORR performance, and extreme durability, Co-Mo-ON/NG nanodendrites emerged as a promising non-precious and highly stable ORR electrocatalyst in fuel cell applications.
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Affiliation(s)
- Kamaldeep Sharma
- Advanced Materials Institute of BIN Convergence Technology (BK21 plus Global Program), Department of BIN Convergence Technology, Chonbuk National University, Jeonju, Jeonbuk 54896, Republic of Korea.
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Balaji SS, Karnan M, Sathish M. Symmetric electrochemical supercapacitor performance evaluation of N-doped graphene prepared via supercritical fluid processing. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-4086-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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46
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Investigation of active sites for C H functionalization on carbon-based catalyst: Effect of nitrogen-containing functional groups and radicals. J Catal 2018. [DOI: 10.1016/j.jcat.2018.07.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Rowley-Neale S, Ratova M, Fugita LTN, Smith GC, Gaffar A, Kulczyk-Malecka J, Kelly PJ, Banks CE. Magnetron Sputter-Coated Nanoparticle MoS 2 Supported on Nanocarbon: A Highly Efficient Electrocatalyst toward the Hydrogen Evolution Reaction. ACS OMEGA 2018; 3:7235-7242. [PMID: 31458885 PMCID: PMC6644582 DOI: 10.1021/acsomega.8b00258] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 06/07/2018] [Indexed: 05/11/2023]
Abstract
The design and fabrication of inexpensive highly efficient electrocatalysts for the production of hydrogen via the hydrogen evolution reaction (HER) underpin a plethora of emerging clean energy technologies. Herein, we report the fabrication of highly efficient electrocatalysts for the HER based on magnetron-sputtered MoS2 onto a nanocarbon support, termed MoS2/C. Magnetron sputtering time is explored as a function of its physiochemical composition and HER performance; increased sputtering times give rise to materials with differing compositions, i.e., Mo4+ to Mo6+ and associated S anions (sulfide, elemental, and sulfate), and improved HER outputs. An optimized sputtering time of 45 min was used to fabricate the MoS2/C material. This gave rise to an optimal HER performance with regard to its HER onset potential, achievable current, and Tafel value, which were -0.44 (vs saturated calomel electrode (SCE)), -1.45 mV s-1, and 43 mV dec-1, respectively, which has the highest composition of Mo4+ and sulfide (MoS2). Electrochemical testing toward the HER via drop casting MoS2/C upon screen-printed electrodes (SPEs) to electrically wire the nanomaterial is found to be mass coverage dependent, where the current density increases up to a critical mass (ca. 50 μg cm-2), after which a plateau is observed. To allow for a translation of the bespoke fabricated MoS2/C from laboratory to new industrial applications, MoS2/C was incorporated into the bulk ink utilized in the fabrication of SPEs (denoted as MoS2/C-SPE), thus allowing for improved electrical wiring to the MoS2/C and resulting in the production of scalable and reproducible electrocatalytic platforms. The MoS2/C-SPEs displayed far greater HER catalysis with a 450 mV reduction in the HER onset potential and a 1.70 mA cm-2 increase in the achievable current density (recorded at -0.75 V (vs SCE)), compared to a bare/unmodified graphitic SPE. The approach of using magnetron sputtering to modify carbon with MoS2 facilitates the production of mass-producible, stable, and effective electrode materials for possible use in electrolyzers, which are cost competitive to Pt and mitigate the need to use time-consuming and low-yield exfoliation techniques typically used to fabricate pristine MoS2.
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Affiliation(s)
- Samuel
J. Rowley-Neale
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
| | - Marina Ratova
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
| | - Lucas T. N. Fugita
- University
of São Paulo, 580, Prof. Lineu Prestes Avenue, Butantã, São Paulo 05508-000, SP, Brazil
| | - Graham C. Smith
- Department
of Natural Sciences, Faculty of Science and Engineering, University of Chester, Thornton Science Park, Pool Lane,
Ince, Chester CH2 4NU, U.K.
| | - Amer Gaffar
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
| | - Justyna Kulczyk-Malecka
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
| | - Peter J. Kelly
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
| | - Craig E. Banks
- Faculty
of Science and Engineering and Manchester Fuel Cell Innovation
Centre, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, U.K.
- E-mail: . Tel: ++(0)1612471196. Fax: ++(0)1612476831. Website: www.craigbanksresearch.com
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48
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Zu L, Gao X, Lian H, Cai X, Li C, Zhong Y, Hao Y, Zhang Y, Gong Z, Liu Y, Wang X, Cui X. High Electrochemical Performance Phosphorus-Oxide Modified Graphene Electrode for Redox Supercapacitors Prepared by One-Step Electrochemical Exfoliation. NANOMATERIALS 2018; 8:nano8060417. [PMID: 29890742 PMCID: PMC6027329 DOI: 10.3390/nano8060417] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/04/2018] [Accepted: 06/04/2018] [Indexed: 11/16/2022]
Abstract
Phosphorus oxide modified graphene was prepared by one-step electrochemical anodic exfoliation method and utilized as electrode in a redox supercapacitor that contained potassium iodide in electrolytes. The whole preparation process was completed in a few minutes and the yield was about 37.2%. The prepared sample has better electrocatalysis activity for I−/I−3 redox reaction than graphite due to the good charge transfer performance between phosphorus oxide and iodide ions. The maximum discharge specific capacitance is 1634.2 F/g when the current density is 3.5 mA/cm2 and it can keep at 463 F/g after 500 charging–discharging cycles when the current density increased about three times.
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Affiliation(s)
- Lei Zu
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Xing Gao
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Huiqin Lian
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Xiaomin Cai
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Ce Li
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Ying Zhong
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Yicheng Hao
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Yifan Zhang
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Zheng Gong
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Yang Liu
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
| | - Xiaodong Wang
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China.
| | - Xiuguo Cui
- School of Material Science and Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China.
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49
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Mokhtar
Mohamed M, Mousa MA, Khairy M, Amer AA. Nitrogen Graphene: A New and Exciting Generation of Visible Light Driven Photocatalyst and Energy Storage Application. ACS OMEGA 2018; 3:1801-1814. [PMID: 31458494 PMCID: PMC6641361 DOI: 10.1021/acsomega.7b01806] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 01/08/2018] [Indexed: 06/10/2023]
Abstract
The synthesis of nitrogen, boron, and nitrogen-boron-codoped graphenes was attained via mixing solutions of GO with urea, boric acid, and a mixture of both, respectively, followed by drying in vacuum and annealing at 900 °C for 10 h. These materials were thoroughly characterized employing XRD, TEM, FTIR, Raman, UV-vis, XPS, IPCE%, and electrical conductivity measurements. The nitrogen-doped graphene (NG) showed an excellent supercapacitor performance with a higher specific capacitance (388 F·g-1 at 1 A·g-1), superior stability, and a higher power density of 0.260 kW kg-1. This was mainly due to the designated N types of doping and most importantly N-O bonds and to lowering charge transfer and equivalent series resistances. The NG also indicated the highest photocatalytic performance for methylene blue (MB 20 ppm, power = 160 W, λ > 420 nm) and phenol (5 ppm) degradation under visible light illumination with rate constants equal 0.013 min-1 and 0.04 min-1, respectively. The photodegradation mechanism was proposed via determining the energy band potentials using the Mott-Schottky measurements. This determined that photoactivity enhancement of the NG is accounted for by acquisition of nitrogen-oxy-carbide phases that shared in inducing a higher IPCE% (60%) and a lower band gap value (1.68 eV) compared to boron and nitrogen-boron-codoped graphenes. The achieved photodegradation mechanism relied on scavengers performance suggesting that •OH and electrons were the main reactive species responsible for the MB photodegradation.
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Affiliation(s)
| | - Mahmoud A. Mousa
- Benha
University, Faculty of Science,
Chemistry Department, Benha 13511, Egypt
| | - Mohamed Khairy
- Chemistry
Department, College of Science, Al Imam
Mohammad Ibn Saud lslamic University, Riyadh 11432, Kingdom
of Saudi Arabia
| | - Ahmed A. Amer
- Benha
University, Faculty of Science,
Chemistry Department, Benha 13511, Egypt
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50
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Thanh TD, Chuong ND, Hien HV, Kim NH, Lee JH. CuAg@Ag Core-Shell Nanostructure Encapsulated by N-Doped Graphene as a High-Performance Catalyst for Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2018; 10:4672-4681. [PMID: 29336546 DOI: 10.1021/acsami.7b16294] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Development of a robust, cost-effective, and efficient catalyst is extremely necessary for oxygen reduction reaction (ORR) in fuel cell applications. Herein, we reported a well-defined nanostructured catalyst of highly dispersed CuAg@Ag core-shell nanoparticle (NP)-encapsulated nitrogen-doped graphene nanosheets (CuAg@Ag/N-GNS) exhibiting a superior catalytic activity toward ORR in alkaline medium. The synergistic effects produced from the unique properties of CuAg@Ag core-shell NPs and N-GNS made such a novel nanohybrid display a catalytic behavior comparable to that of the commercial Pt/C product. In particular, it demonstrated a much better stability and methanol tolerance than Pt/C under the same conditions. Because of its outstanding electrochemical performance and ease of synthesis, CuAg@Ag/N-GNS material was expected to be a promising low-cost catalyst for ORR in alkaline fuel cell applications.
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Affiliation(s)
- Tran Duy Thanh
- Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea
| | - Nguyen Dinh Chuong
- Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea
| | - Hoa Van Hien
- Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea
| | - Nam Hoon Kim
- Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea
| | - Joong Hee Lee
- Advanced Materials Institute of BIN Convergence Technology (BK21 Plus Global), Department of BIN Convergence Technology, and ‡Carbon Composite Research Centre, Department of Polymer & Nanoscience and Technology, Chonbuk National University , Jeonju, Jeonbuk 54896, Republic of Korea
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