1
|
Ismardi A, Gunawan TD, Suhendi A, Fathona IW. Study of graphene incorporation into ZnO-PVA nanocomposites modified electrode for sensitive detection of cadmium. Heliyon 2024; 10:e31565. [PMID: 38832283 PMCID: PMC11145211 DOI: 10.1016/j.heliyon.2024.e31565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 05/17/2024] [Accepted: 05/17/2024] [Indexed: 06/05/2024] Open
Abstract
The presence of heavy metals often causes significant health risks, particularly cadmium, which is known for its high toxicity. In this study, a glassy carbon electrode was successfully modified by incorporating ZnO-PVA-Graphene nanocomposite, leveraging the excellent electrical properties and electron mobility of the material. Comprehensive material analysis, including XRD, confirmed that ZnO maintained its hexagonal wurtzite crystal structure despite the addition of graphene. Moreover, FESEM analysis showed that increasing graphene concentration led to a reduction in ZnO particle size by 85, 68, and 52 nm, respectively, accompanied by a decrease in band gap energy, as verified by UV-Vis measurements. Photoluminescence tests were also conducted and the result showed a noticeable blue shift in ZnO-PVA-Graphene nanocomposites compared to ZnO-PVA, specifically in the near band-edge (NBE) UV emission within the 374-379 nm wavelength range. Through I-V characterization, the optimal graphene concentration for cadmium detection was identified as 1.5 wt% in ZnO-PVA-Graphene nanocomposites, showing an approximate ohmic response. Meanwhile, square-wave voltammetry analysis of cadmium concentrations ranging from 0 to 80 ppm produced a coefficient of determination of 0.98926 and a Limit of Detection (LOD) of 9.88 ppm. These results showed the significant potential of ZnO-PVA-Graphene nanocomposites as a promising material for further development as an effective electrode modifier, enhancing the sensitivity of detection systems.
Collapse
Affiliation(s)
- Abrar Ismardi
- Department of Engineering Physics, School of Electrical Engineering, Telkom University, Bandung, Indonesia
| | - Theresia Deviyana Gunawan
- Department of Engineering Physics, School of Electrical Engineering, Telkom University, Bandung, Indonesia
| | - Asep Suhendi
- Department of Engineering Physics, School of Electrical Engineering, Telkom University, Bandung, Indonesia
| | - Indra Wahyudin Fathona
- Department of Engineering Physics, School of Electrical Engineering, Telkom University, Bandung, Indonesia
| |
Collapse
|
2
|
Vasiliu IC, Filip AV, Chilibon I, Elisa M, Bartha C, Kuncser V, Leca A, Boroica L, Sava BA, Trusca R, Eftimie M, Nicoara A. Effect of P 2O 5 Content on Luminescence of Reduced Graphene-Oxide-Doped ZnO-P 2O 5 Nano-Structured Films Prepared via the Sol-Gel Method. MATERIALS (BASEL, SWITZERLAND) 2023; 16:6156. [PMID: 37763434 PMCID: PMC10532793 DOI: 10.3390/ma16186156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 08/31/2023] [Accepted: 09/06/2023] [Indexed: 09/29/2023]
Abstract
A convenient and low-cost sol-gel approach for the one-step synthesis of ZnO-P2O5-rGO nanostructures with tuned bandgap and fluorescence was investigated. The obtained hybrid nanostructures exploit the properties of zinc oxide, graphene oxide and phosphorous oxide as promising candidates for a wide range of optoelectronic applications. A predominant amorphous structure, ZnO-P2O5-rGO, containing ZnO nanorods was evidenced by X-ray diffraction analysis (XRD) and scanning electron microscopy (SEM). The estimated size of the ZnO nanorods in nanostructures with P2O5 was noticed to decrease when the P2O5/ZnO ratio was increased. The presence of ZnO, P2O5 and rGO was confirmed by Fourier-transform infrared spectroscopy (FTIR) and Raman investigation. P2O5 was noticed to tune the bandgap and the fluorescence emissions of the nanostructured films, as estimated by UV-Vis-NIR and fluorescence spectroscopy, respectively. The electrical measurements performed at room temperature showed that the main influence on the film's resistivity does not come from the 1% rGO doping but from the P2O5/ZnO ratio. It was found that a 10/90 molar ratio of P2O5/ZnO decreases the resistivity almost seven-fold compared with rGO-doped ZnO films.
Collapse
Affiliation(s)
- Ileana Cristina Vasiliu
- National Institute for Research and Development in Optoelectronics—INOE 2000, 409 Atomistilor Str., RO-077125 Magurele, Romania; (I.C.V.); (M.E.)
| | - Ana Violeta Filip
- National Institute for Laser, Plasma and Radiation Physics (INFLPR), 409 Atomistilor Str., RO-077125 Magurele, Romania; (L.B.); (B.A.S.)
| | - Irinela Chilibon
- National Institute for Research and Development in Optoelectronics—INOE 2000, 409 Atomistilor Str., RO-077125 Magurele, Romania; (I.C.V.); (M.E.)
| | - Mihail Elisa
- National Institute for Research and Development in Optoelectronics—INOE 2000, 409 Atomistilor Str., RO-077125 Magurele, Romania; (I.C.V.); (M.E.)
| | - Cristina Bartha
- National Institute of Materials Physics, 405 A Atomistilor Str., RO-077125 Magurele, Romania; (C.B.); (V.K.); (A.L.)
| | - Victor Kuncser
- National Institute of Materials Physics, 405 A Atomistilor Str., RO-077125 Magurele, Romania; (C.B.); (V.K.); (A.L.)
| | - Aurel Leca
- National Institute of Materials Physics, 405 A Atomistilor Str., RO-077125 Magurele, Romania; (C.B.); (V.K.); (A.L.)
| | - Lucica Boroica
- National Institute for Laser, Plasma and Radiation Physics (INFLPR), 409 Atomistilor Str., RO-077125 Magurele, Romania; (L.B.); (B.A.S.)
| | - Bogdan Alexandru Sava
- National Institute for Laser, Plasma and Radiation Physics (INFLPR), 409 Atomistilor Str., RO-077125 Magurele, Romania; (L.B.); (B.A.S.)
- Department of Science and Engineering of Oxide Materials and Nanomaterials, National University of Science and Technology “Politehnica” of Bucharest, 1 Polizu Street, RO-011061 Bucharest, Romania; (M.E.); (A.N.)
| | - Roxana Trusca
- Faculty of Engineering in Foreign Languages, University of Science and Technology “Politehnica” of Bucharest, 313 Splaiul Independentei Str., RO-060042 Bucharest, Romania;
| | - Mihai Eftimie
- Department of Science and Engineering of Oxide Materials and Nanomaterials, National University of Science and Technology “Politehnica” of Bucharest, 1 Polizu Street, RO-011061 Bucharest, Romania; (M.E.); (A.N.)
| | - Adrian Nicoara
- Department of Science and Engineering of Oxide Materials and Nanomaterials, National University of Science and Technology “Politehnica” of Bucharest, 1 Polizu Street, RO-011061 Bucharest, Romania; (M.E.); (A.N.)
| |
Collapse
|
3
|
Zhang L, Li X, Chen S, Guan J, Guo Y, Yu W. 3D chitosan/GO/ZnO hydrogel with enhanced photocorrosion-resistance and adsorption for efficient removal of typical water-soluble pollutants. CATAL COMMUN 2023. [DOI: 10.1016/j.catcom.2023.106627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023] Open
|
4
|
Adsorption Properties and Mechanism of Sepiolite to Graphene Oxide in Aqueous Solution. ARAB J CHEM 2023. [DOI: 10.1016/j.arabjc.2023.104595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
|
5
|
Barilyuk DV, Sukhanova EV, Popov ZI, Korol AA, Konopatsky AS, Shtansky DV. Effect of h-BN Support on Photoluminescence of ZnO Nanoparticles: Experimental and Theoretical Insight. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8759. [PMID: 36556566 PMCID: PMC9782558 DOI: 10.3390/ma15248759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 12/06/2022] [Accepted: 12/06/2022] [Indexed: 06/17/2023]
Abstract
Herein we report a simple and easily scalable method for fabricating ZnO/h-BN composites with tunable photoluminescence (PL) characteristics. The h-BN support significantly enhances the ultraviolet (UV) emission of ZnO nanoparticles (NPs), which is explained by the ZnO/h-BN interaction and the change in the electronic structure of the ZnO surface. When h-BN NPs are replaced with h-BN microparticles, the PL in the UV region increases, which is accompanied by a decrease in visible light emission. The dependence of the PL properties of ZnO NPs on the thickness of h-BN carriers, observed for the first time, is explained by a change in the dielectric constant of the support. A quantum chemical analysis of the influence of the h-BN thickness on the electron density redistribution at the wZnO/h-BN interface and on the optical properties of the wZnO/h-BN composites was carried out. Density functional theory (DFT) calculations show the appearance of hybridization at the h-BN/wZnO interface and an increase in the intensity of absorption peaks with an increase in the number of h-BN layers. The obtained results open new possibilities for controlling the properties of ZnO/h-BN heterostructures for various optical applications.
Collapse
Affiliation(s)
- Danil V. Barilyuk
- National University of Science and Technology “MISIS”, Leninsky Prospect 4, Moscow 119049, Russia
| | - Ekaterina V. Sukhanova
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics RAS, Kosygina 4, Moscow 119334, Russia
| | - Zakhar I. Popov
- Laboratory of Acoustic Microscopy, Emanuel Institute of Biochemical Physics RAS, Kosygina 4, Moscow 119334, Russia
- Academic Department of Innovational Materials and Technologies Chemistry, Plekhanov Russian University of Economics, 36 Stremyanny per., Moscow 117997, Russia
| | - Artem A. Korol
- National University of Science and Technology “MISIS”, Leninsky Prospect 4, Moscow 119049, Russia
| | - Anton S. Konopatsky
- National University of Science and Technology “MISIS”, Leninsky Prospect 4, Moscow 119049, Russia
| | - Dmitry V. Shtansky
- National University of Science and Technology “MISIS”, Leninsky Prospect 4, Moscow 119049, Russia
| |
Collapse
|
6
|
A novel synthesis of graphene oxide-titanium dioxide (GO-TiO 2) and graphene oxide-zinc oxide (GO-ZnO) nanocomposites and their application as effective, reusable photocatalysts for degradation of methylene blue (MB) dye. Z PHYS CHEM 2022. [DOI: 10.1515/zpch-2022-0065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Abstract
The current study focuses on graphene oxide (GO) and its composite with zinc oxide and titanium dioxide nanoparticles to develop a simple nano chemistry-based clean and efficient process for the effective degradation of methylene blue (MB) dye. Graphene oxide composite with zinc oxide and titanium dioxide nanoparticles were fabricated via a thermal coupling process that demonstrates exclusive physiochemical properties. A detailed comparison of the structure, morphology, and surface analysis of synthesized GO and nanocomposites, as well as their electrochemical properties, has been accomplished. By using the degradation of methylene blue (MB) dye the photocatalytic function of nanocomposites was studied. Results reveal that the rate constants of GO, GO-TiO2, and GO-ZnO photocatalysts are 1.06 × 10−3 min−1, 2.56 × 10−3 min−1, and 1.63 × 10−3 min−1 respectively which discloses GO-TiO2 nanocomposite shows maximum degradation of MB dye among both catalysts. The reuse of photocatalyst even after five cycles retained the degradation efficiency of 80, 77, and 49% respectively for GO-TiO2, GO-ZnO, and GO when tested against MB. Hence, as a result, it was determined that these photocatalysts are ideal for the remediation of dye-contaminated wastewater.
Collapse
|
7
|
Strachowski T, Baran M, Małek M, Kosturek R, Grzanka E, Mizeracki J, Romanowska A, Marynowicz S. Hydrothermal Synthesis of Zinc Oxide Nanoparticles Using Different Chemical Reaction Stimulation Methods and Their Influence on Process Kinetics. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15217661. [PMID: 36363254 PMCID: PMC9654224 DOI: 10.3390/ma15217661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/21/2022] [Accepted: 10/28/2022] [Indexed: 06/01/2023]
Abstract
The aim of this work was to study the effect of the applied chemical reaction stimulation method on the morphology and structural properties of zinc oxide nanoparticles (ZnONPs). Various methods of chemical reaction induction were applied, including microwave, high potential, conventional resistance heater and autoclave-based methods. A novel, high potential-based ZnONPs synthesis method is herein proposed. Structural properties-phase purity, grain size-were examined with XRD methods, the specific surface area was determined using BET techniques and the morphology was examined using SEM. Based on the results, the microwave and autoclave syntheses allowed us to obtain the desired phase within a short period of time. The impulse-induced method is a promising alternative since it offers a non-equilibrium course of the synthesis process in an highly energy-efficient manner.
Collapse
Affiliation(s)
- Tomasz Strachowski
- Lukasiewicz Research Network–Institute of Microelectronics and Photonics IMIF, Research Group of Graphene and Composites, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Magdalena Baran
- Lukasiewicz Research Network–Institute of Microelectronics and Photonics IMIF, Research Group of Graphene and Composites, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Marcin Małek
- Faculty of Civil and Engineering and Geology, Research Laboratory of WIG, Military University of Technology, ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
| | - Robert Kosturek
- Faculty of Mechanical Engineering, Institute of Robots & Machine Design, Military University of Technology, ul. Gen. Sylwestra Kaliskiego 2, 00-908 Warsaw, Poland
| | - Ewa Grzanka
- Institute of High Pressure Physics PAS, ul. Sokołowska 29/37, 01-141 Warsaw, Poland
| | - Jan Mizeracki
- Institute of High Pressure Physics PAS, ul. Sokołowska 29/37, 01-141 Warsaw, Poland
| | - Agata Romanowska
- Lukasiewicz Research Network–Institute of Microelectronics and Photonics IMIF, Research Group of Graphene and Composites, al. Lotników 32/46, 02-668 Warsaw, Poland
| | - Stefan Marynowicz
- Lukasiewicz Research Network–Institute of Microelectronics and Photonics IMIF, Research Group of Graphene and Composites, al. Lotników 32/46, 02-668 Warsaw, Poland
| |
Collapse
|
8
|
Socol M, Preda N. Editorial for Special Issue: "Thin Films Based on Nanocomposites". NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3301. [PMID: 36234427 PMCID: PMC9565326 DOI: 10.3390/nano12193301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
Nanocomposites gained great attention from both fundamental scientific research and technological application perspectives emerging as a fascinating class of advanced functional materials, that can find applications in various areas such as electronics, energy, environmental protection, healthcare, etc [...].
Collapse
|
9
|
Li N, Fang J, Jiang P, Li C, Kang H, Wang W. Adsorption Properties and Mechanism of Attapulgite to Graphene Oxide in Aqueous Solution. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052793. [PMID: 35270485 PMCID: PMC8910037 DOI: 10.3390/ijerph19052793] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 02/23/2022] [Accepted: 02/25/2022] [Indexed: 02/04/2023]
Abstract
In order to remove toxic graphene oxide (GO) from aqueous solution, attapulgite (ATP) was used as adsorbent to recycle it by adsorption. In this paper, the effects of different pH, adsorbent mass, GO concentration, time and temperature on the adsorption of GO by attapulgite were studied, and the adsorption performance and mechanism were further explored by XRD, AFM, XPS, FTIR, TEM and SEM tests. The results show that when T = 303 K, pH = 3, and the GO concentration is 100 mg/L in 50 mL of aqueous solution, the removal rate of GO by 40 mg of attapulgite reaches 92.83%, and the partition coefficient Kd reaches 16.31. The adsorption kinetics results showed that the adsorption equilibrium was reached at 2160 min, and the adsorption process could be described by the pseudo-second-order adsorption equation, indicating that the adsorption process was accompanied by chemical adsorption and physical adsorption. The isotherm and thermodynamic parameters show that the adsorption of GO by attapulgite is more consistent with the Langmuir isotherm model, and the reaction is a spontaneous endothermic process. The analysis shows that attapulgite is a good material for removing GO, which can provide a reference for the removal of GO in an aqueous environment.
Collapse
Affiliation(s)
- Na Li
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (N.L.); (J.F.); (P.J.); (C.L.)
| | - Jiyuan Fang
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (N.L.); (J.F.); (P.J.); (C.L.)
| | - Ping Jiang
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (N.L.); (J.F.); (P.J.); (C.L.)
| | - Cuihong Li
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (N.L.); (J.F.); (P.J.); (C.L.)
| | - Haibo Kang
- School of Civil Engineering, College of Transportation Engineering, Nanjing Tech University, Nanjing 210009, China;
| | - Wei Wang
- School of Civil Engineering, Shaoxing University, Shaoxing 312000, China; (N.L.); (J.F.); (P.J.); (C.L.)
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore
- Correspondence:
| |
Collapse
|
10
|
Abstract
In this work, the main objective is to enhance the gas sensing capability through investigating the effect of Al and Mg doping on ZnO based sensors. ZnO, Mg1% doped ZnO, Al5% doped ZnO and (Al5%, Mg1%) co-doped ZnO nanoparticles (NPs) were synthesized by a modified sol-gel method. The structural characterization showed the hexagonal crystalline structure of the prepared samples. Morphological characterizations confirmed the nanometric sizes of the NPs (27–57 nm) and elemental composition investigation proved the existence of Al and Mg with low concentrations. The optical characterization showed the high absorbance of the synthesized samples in the UV range. The gas sensing performances of the synthesized samples, prepared in the form of thick films, were investigated. Sensing tests demonstrated the high influence of the Al and Mg on the sensing performances towards H2 and CO gas, respectively. The 5A1MZO-based sensor exhibits high sensitivity and low detection limits to H2 (<2 ppm) and CO (<1 ppm). It showed a response around 70 (at 250 °C) towards 2000 ppm H2 and 2 (at 250 °C) towards CO.
Collapse
|
11
|
Ikram M, Inayat T, Haider A, Ul-Hamid A, Haider J, Nabgan W, Saeed A, Shahbaz A, Hayat S, Ul-Ain K, Butt AR. Graphene Oxide-Doped MgO Nanostructures for Highly Efficient Dye Degradation and Bactericidal Action. NANOSCALE RESEARCH LETTERS 2021; 16:56. [PMID: 33825981 PMCID: PMC8026802 DOI: 10.1186/s11671-021-03516-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 03/24/2021] [Indexed: 05/30/2023]
Abstract
Various concentrations (0.01, 0.03 and 0.05 wt ratios) of graphene oxide (GO) nanosheets were doped into magnesium oxide (MgO) nanostructures using chemical precipitation technique. The objective was to study the effect of GO dopant concentrations on the catalytic and antibacterial behavior of fixed amount of MgO. XRD technique revealed cubic phase of MgO, while its crystalline nature was confirmed through SAED profiles. Functional groups presence and Mg-O (443 cm-1) in fingerprint region was evident with FTIR spectroscopy. Optical properties were recorded via UV-visible spectroscopy with redshift pointing to a decrease in band gap energy from 5.0 to 4.8 eV upon doping. Electron-hole recombination behavior was examined through photoluminescence (PL) spectroscopy. Raman spectra exhibited D band (1338 cm-1) and G band (1598 cm-1) evident to GO doping. Formation of nanostructure with cubic and hexagon morphology was confirmed with TEM, whereas interlayer average d-spacing of 0.23 nm was assessed using HR-TEM. Dopants existence and evaluation of elemental constitution Mg, O were corroborated using EDS technique. Catalytic activity against methyl blue ciprofloxacin (MBCF) was significantly reduced (45%) for higher GO dopant concentration (0.05), whereas bactericidal activity of MgO against E. coli was improved significantly (4.85 mm inhibition zone) upon doping with higher concentration (0.05) of GO, owing to the formation of nanorods.
Collapse
Affiliation(s)
- M Ikram
- Solar Cell Application Research Lab, Department of Physics, Government College University Lahore, Lahore, 54000, Punjab, Pakistan.
| | - T Inayat
- Physics Department, Lahore Garrison University, Lahore, 54000, Punjab, Pakistan
| | - A Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore, 54000, Punjab, Pakistan
| | - A Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
| | - J Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - W Nabgan
- School of Chemical and Energy Engineering, Faculty of Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - A Saeed
- Department of Chemistry, Quaid-i-Azam University, Islamabad, 45320, Pakistan
| | - A Shahbaz
- Department of Physics, Government College University Lahore, 54000, Lahore, Pakistan
| | - S Hayat
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - K Ul-Ain
- Department of Physics, Riphah Institute of Computing and Applied Sciences (RICAS), Riphah International University, 14 Ali Road, Lahore, Pakistan
| | - A R Butt
- Physics Department, Lahore Garrison University, Lahore, 54000, Punjab, Pakistan
| |
Collapse
|
12
|
J P, Kottam N, A R. Investigation of photocatalytic degradation of crystal violet and its correlation with bandgap in ZnO and ZnO/GO nanohybrid. INORG CHEM COMMUN 2021. [DOI: 10.1016/j.inoche.2021.108460] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
13
|
Siddiqui S, Siddiqui ZN. Synthesis and catalytic evaluation of PVP-CeO 2/rGO as a highly efficient and recyclable heterogeneous catalyst for multicomponent reactions in water. NANOSCALE ADVANCES 2020; 2:4639-4651. [PMID: 36132914 PMCID: PMC9419207 DOI: 10.1039/d0na00491j] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 06/24/2020] [Indexed: 05/24/2023]
Abstract
A highly efficient and eco-friendly route for the reduction of graphene oxide (GO) to reduced graphene oxide (rGO) was developed by using polyvinylpyrrolidone coated CeO2 NPs (PVP-CeO2) as a reducing and stabilizing agent. The resulting carbonaceous material, PVP-CeO2/rGO, was well characterized with different spectroscopic techniques such as Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), Energy Dispersive X-ray (EDX), elemental mapping, Transmission Electron Microscopy (TEM), Raman spectroscopy, powder X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray Photoelectron Spectroscopy (XPS), and Thermal Gravimetric (TG) analyses. The material exhibited high catalytic potential towards multicomponent reactions for the synthesis of biologically relevant benzodiazepine derivatives in aqueous media. The efficiency of the material for the desired reaction was shown in the form of an excellent product yield (96-98%) and a very short reaction time period (7-10 min). The use of water as solvent and recyclability of the catalyst made the present protocol acceptable from a green perspective.
Collapse
Affiliation(s)
- Shaheen Siddiqui
- Department of Chemistry, Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| | - Zeba N Siddiqui
- Department of Chemistry, Aligarh Muslim University Aligarh 202002 Uttar Pradesh India
| |
Collapse
|