g-C3N4/Ag3PO4 composites with synergistic effect for increased photocatalytic activity under the visible light irradiation |
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| Affiliation: | 1. School of the Environment, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China;2. Hainan Provincial Key Laboratory of Fine Chemistry, Hainan University, Haikou, Hainan 570228, PR China;1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. School of Pharmacy, Suzhou Vocational Health College, Suzhou 212013, PR China;3. College of Science, Nanjing Forestry University, Nanjing 210037, PR China;1. Institute for Energy Research, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013, PR China;2. School of Chemistry & Chemical Engineering, Jiangsu University, 301 Xuefu Road, Zhenjiang, Jiangsu 212013, PR China;1. PPGQ-GERATEC, Universidade Estadual do Piauí, Rua: João Cabral, N. 2231, P.O. Box 381, 64002-150, Teresina, PI, Brazil;2. Departamento de Química-DQ-PPGQ, Universidade Federal do Piauí–UFPI, Petrônio Portela, 64049-550, Teresina, PI, Brazil;3. Departamento de Físico-Química, Universidade Estadual Paulista, 14800-060, Araraquara, SP, Brazil;1. College of Environmental State Key Laboratory of Pollution Control and Resource Reuse (Tongji University), Shanghai, China;2. Key Laboratory of Yangtze River Water Environment, Ministry of Education, Shanghai, China |
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| Abstract: | The g-C3N4 was synthesized by a hydrothermal method and the g-C3N4/Ag3PO4 composites were prepared by a ordinary precipitation method. Microstructures, morphologies and optical properties of the as-prepared samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FT-IR), UV–vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). The results showed that the Ag3PO4 nanoparticles were dispersed on the surface of the flake-like g-C3N4, and the heterojunction was formed on the interface. The g-C3N4/Ag3PO4 (2 wt%) photocatalyst presented the highest photocatalytic activity for organic dye methylene blue (MB) degradation, and its photocurrent intensity was approximately 2 times than that of the pure Ag3PO4. The g-C3N4/Ag3PO4 (2 wt%) photocatalyst also exhibited photocatalytic performance in the decomposition of colorless antibiotic ciprofloxacin (CIP). The capture experiment confirmed that holes acted as the main active species during the photocatalytic reaction. |
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| Keywords: | Photocatalytic Degradation |
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