| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation of CeO2/BiOI/g-C3N4 Composite and Its Photocatalytic Degradation Property for RhB Under Visible Light |
| CAO Yida1,2, LIU Chengbao1,2,3,*, CHEN Feng1,2,3, QIAN Junchao1,2,3, XU Xiaojing4, MENG Xianrong5, CHEN Zhigang1,2,3
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1 Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
2 School of Materials Science and Engineering, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu, China
3 Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment, Suzhou University of Science and Technology, Suzhou 215009, Jiangsu,China
4 Jiangsu Province Ceramics Research Institute Co., Ltd., Yixing 214221, Jiangsu, China
5 Suzhou Institute of Environmental Science, Suzhou 215007, Jiangsu, China |
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Abstract The CeO2/BiOI/g-C3N4 composites were synthesized by solvothermal and ultrasonic stirring method. The composition, microstructure and optical properties of the material were characterized by XRD, SEM, TEM and UV-Vis DRS. The obtained CeO2/BiOI/g-C3N4 has tighter interface structure, good light response property, uniform phase distribution and high degree of crystallization. Photocatalytic degradation experiments showed that under visible light(λ＞420 nm), the photocatalytic degradation efficiency of CeO2/BiOI/g-C3N4 (Ce/Bi molar ratio was 2∶1, and g-C3N4 mass fraction was 5%) for RhB was 71%, which was 7 times that of pure CeO2 and 10 times that of pure BiOI. The sample remained high photocatalytic efficiency after four cycles, revealing its good circulatory stability. Finally, the photocatalytic mechanism of the composites was introduced. It was clear that the real active substances in the photocatalytic experiment were holes and superoxide radicals.
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Published: 10 February 2023
Online: 2023-02-23
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| Fund:Natural Science Foundation of Jiangsu Province (BK20180103，BK20180971), and Suzhou Science and Technology Development Plan Project (Livelihood Science and Technology-Application Research of Key Technology) (SS202036). |
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2023, Vol. 37 
