Citation: Zhen Li, Xia Wang, Jinfeng Zhang, Changhao Liang, Luhua Lu, Kai Dai. Preparation of Z-scheme WO₃(H₂O)_0.333/Ag₃PO₄ composites with enhanced photocatalytic activity and durability[J]. Chinese Journal of Catalysis, ;2019, 40(3): 326-334. doi: 10.1016/S1872-2067(18)63165-1 shu

Preparation of Z-scheme WO₃(H₂O)_0.333/Ag₃PO₄ composites with enhanced photocatalytic activity and durability

Zhen Li ^a, ,
Xia Wang ^c ,
Jinfeng Zhang ^a ,
Changhao Liang ^b ,
Luhua Lu ^d ,
Kai Dai ^a

a School of Physics and Electronic Information, Anhui Key Laboratory of Energetic Materials, Huaibei Normal University, Huaibei 235000, Anhui, China;
b Key Laboratory of Materials Physics and Anhui Key Laboratory of Nanomaterials and Nanotechnology, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui, China;
c Department of Mechanical Engineering and Design, Botou Vocational College, Cangzhou 062150, Hebei, China;
d Engineering Research Center of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, Hubei, China

Received Date: 31 July 2018
Revised Date: 15 September 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (51572103 and 51502106), the Distinguished Young Scholar of Anhui Province (1808085J14), the Foundation for Young Talents in College of Anhui Province (gxyqZD2017051), the Key Foundation of Educational Commission of Anhui Province (KJ2016SD53), and the Innovation Team of Design and Application of Advanced Energetic Materials (KJ2015TD003).

Ag₃PO₄ is widely used in the field of photocatalysis because of its unique activity. However, photocorrosion limits its practical application. Therefore, it is very urgent to find a solution to improve the light corrosion resistance of Ag₃PO₄. Herein, the Z-scheme WO₃(H₂O)_0.333/Ag₃PO₄ composites are successfully prepared through microwave hydrothermal and simple stirring. The WO₃(H₂O)_0.333/Ag₃PO₄ composites are characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and UV-Vis spectroscopy. In the degradation of organic pollutants, WO₃(H₂O)_0.333/Ag₃PO₄ composites exhibit excellent performance under visible light. This is mainly attributed to the synergy of WO₃(H₂O)_0.333 and Ag₃PO₄. Especially, the photocatalytic activity of 15% WO₃(H₂O)_0.333/Ag₃PO₄ is the highest, and the methylene blue can be completely degraded in 4 min. In addition, the stability of the composites is also greatly enhanced. After five cycles of testing, the photocatalytic activity of 15% WO₃(H₂O)_0.333/Ag₃PO₄ is not obviously decreased. However, the degradation efficiency of Ag₃PO₄ was only 20.2%. This indicates that adding WO₃(H₂O)_0.333 can significantly improve the photoetching resistance of Ag₃PO₄. Finally, Z-scheme photocatalytic mechanism is investigated.
- Photocatalysis,
- Ag₃PO₄,
- WO₃(H₂O)_0.333,
- Composites,
- Z-scheme
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Preparation of Z-scheme WO₃(H₂O)_0.333/Ag₃PO₄ composites with enhanced photocatalytic activity and durability