Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics
Enhancing photon absorption across visible region could be of great significance in visualizing rapid photocatalytic reactions. In this regard, we report on a novel three-dimensional (3D) rGO/ZnO/Ag heterostructure processed via solvothermal and photoreduction techniques. The structural studies reve...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-01-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785420321384 |
| _version_ | 1829141234113839104 |
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| author | S. Banumathi J. Uma A. Ravi B. Balraj C. Siva P. Ilanchezhiyan G. Mohan Kumar |
| author_facet | S. Banumathi J. Uma A. Ravi B. Balraj C. Siva P. Ilanchezhiyan G. Mohan Kumar |
| author_sort | S. Banumathi |
| collection | DOAJ |
| description | Enhancing photon absorption across visible region could be of great significance in visualizing rapid photocatalytic reactions. In this regard, we report on a novel three-dimensional (3D) rGO/ZnO/Ag heterostructure processed via solvothermal and photoreduction techniques. The structural studies revealed the formation of a complete rGO/ZnO/Ag heterostructure. The microscopic images revealed ZnO on rGO specimens and Ag on both ZnO and rGO surface. Enhanced visible region photon absorption and lowering in band gap values was realized in rGO/ZnO/Ag specimens over rGO/ZnO. The photocatalytic performance evaluated through dye degradation reactions under sunlight illumination indicated 3D heterostructure to exhibit rapid and enhanced photocatalytic activity. A schematic mechanism was established to illustrate the enhanced charge transfer kinetics involved in the reactions. Additionally, studies on increased photocatalytic reaction rate for addition of H2O2 and role of reaction temperature was also made. The obtained heterostructure also demonstrated ≈99% efficiency towards recycled photocatalytic reactions. |
| first_indexed | 2024-12-14T20:06:55Z |
| format | Article |
| id | doaj.art-3daef573075041c0b462c7ef553d1da5 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-14T20:06:55Z |
| publishDate | 2021-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-3daef573075041c0b462c7ef553d1da52022-12-21T22:49:00ZengElsevierJournal of Materials Research and Technology2238-78542021-01-011013011309Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kineticsS. Banumathi0J. Uma1A. Ravi2B. Balraj3C. Siva4P. Ilanchezhiyan5G. Mohan Kumar6Department of Electrical and Electronics Engineering, M.Kumarasamy College of Engineering, Karur, 639113, IndiaDepartment of Electrical and Electronics Engineering, M.Kumarasamy College of Engineering, Karur, 639113, IndiaDepartment of Physics, University College of Engineering, Anna University, Kancheepuram, 631552, IndiaDepartment of Electrical and Electronics Engineering, K. Ramakrishnan College of Technology, Tiruchirappalli, 621112, IndiaDepartment of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, 603203, IndiaQuantum-Functional Semiconductor Research Center (QSRC), Dongguk University, Seoul, 04623, South Korea; Nano-Information Technology Academy (NITA), Dongguk University, Seoul, 04623, South KoreaQuantum-Functional Semiconductor Research Center (QSRC), Dongguk University, Seoul, 04623, South Korea; Nano-Information Technology Academy (NITA), Dongguk University, Seoul, 04623, South Korea; Corresponding author.Enhancing photon absorption across visible region could be of great significance in visualizing rapid photocatalytic reactions. In this regard, we report on a novel three-dimensional (3D) rGO/ZnO/Ag heterostructure processed via solvothermal and photoreduction techniques. The structural studies revealed the formation of a complete rGO/ZnO/Ag heterostructure. The microscopic images revealed ZnO on rGO specimens and Ag on both ZnO and rGO surface. Enhanced visible region photon absorption and lowering in band gap values was realized in rGO/ZnO/Ag specimens over rGO/ZnO. The photocatalytic performance evaluated through dye degradation reactions under sunlight illumination indicated 3D heterostructure to exhibit rapid and enhanced photocatalytic activity. A schematic mechanism was established to illustrate the enhanced charge transfer kinetics involved in the reactions. Additionally, studies on increased photocatalytic reaction rate for addition of H2O2 and role of reaction temperature was also made. The obtained heterostructure also demonstrated ≈99% efficiency towards recycled photocatalytic reactions.http://www.sciencedirect.com/science/article/pii/S2238785420321384GrapheneHeterostructuresPhotocatalysisSunlightZnO |
| spellingShingle | S. Banumathi J. Uma A. Ravi B. Balraj C. Siva P. Ilanchezhiyan G. Mohan Kumar Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics Journal of Materials Research and Technology Graphene Heterostructures Photocatalysis Sunlight ZnO |
| title | Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics |
| title_full | Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics |
| title_fullStr | Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics |
| title_full_unstemmed | Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics |
| title_short | Rapid sun-light driven photocatalytic functions of 3D rGO/ZnO/Ag heterostructures via improved charge transfer kinetics |
| title_sort | rapid sun light driven photocatalytic functions of 3d rgo zno ag heterostructures via improved charge transfer kinetics |
| topic | Graphene Heterostructures Photocatalysis Sunlight ZnO |
| url | http://www.sciencedirect.com/science/article/pii/S2238785420321384 |
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