Combination of Ag2CrO4 and AgI semiconductors with g-C3N4: Novel nanocomposites with substantially improved photocatalytic performance under visible light |
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| Institution: | 1. Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, Taipei, Taiwan, ROC;2. Precision and Materials Research Centre, National Taipei University of Technology, Taipei, Taiwan, ROC;3. Division of Electrical and Electronic Engineering, School of Engineering, Manchester Metropolitan University, Chester Street, Manchester M1 5GD, United Kingdom;4. Chemistry Department, College of Science, Sultan Qaboos University, P.O. Box 36, Al-Khoudh 123, Muscat, Oman;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China;2. Hunan Key Laboratory of Applied Environmental Photocatalysis, Changsha University, Changsha 410022, PR China;1. School of Chemistry and Environmental Engineering, Yancheng Teachers University, Yancheng, Jiangsu Province 224051, China;2. College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, China;3. College of Environmental Science Engineering, Hunan University, Changsha 410082, China |
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| Abstract: | Novel g-C3N4/Ag2CrO4/AgI nanocomposites with improved photocatalytic performance under visible light were synthesized by consecutive deposition of Ag2CrO4 and AgI semiconductors over g-C3N4 sheets by refluxing method. The synthesized g-C3N4/Ag2CrO4/AgI photocatalysts were fully characterized by XRD, EDX, SEM, TEM, UV–vis DRS, TGA, FT-IR, and PL instruments. Photocatalytic performance of g-C3N4/Ag2CrO4/AgI (30%) nanocomposite for degradation of RhB was 27.9, 4.0, and 3.1 folds greater than those of the g-C3N4, g-C3N4/Ag2CrO4 (20%), and g-C3N4/AgI (30%) photocatalysts, respectively. The substantially increased photocatalytic performance was related to efficient retardation of the charge carriers from recombination and more absorbing of visible light, due to the synergistic effects of Ag2CrO4 and AgI on g-C3N4. The photocatalytic performance of the ternary nanocomposite did not considerably change after several cycles, indicating that the ternary nanocomposite is stable and it could be reused in successive runs. |
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| Keywords: | Photocatalyst Nanocomposite Visible-light-driven |
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