Citation: Jia-de Li, Chang-lin Yu, Wen Fang, Li-hua Zhu, Wan-qin Zhou, Qi-zhe Fan. Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres[J]. Chinese Journal of Catalysis, ;2015, 36(7): 987-993. doi: 10.1016/S1872-2067(15)60849-X shu

Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres

Jia-de Li ^a ,
Chang-lin Yu ^a,, ,
Wen Fang ^a,b ,
Li-hua Zhu ^a ,
Wan-qin Zhou ^a ,
Qi-zhe Fan ^a

1.
a School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Jiangxi, Ganzhou 341000, Jiangxi, China;

Corresponding author: Chang-lin Yu,
Received Date: 25 February 2015
Available Online: 27 March 2015
Fund Project: 国家自然科学基金(21067004, 21263005) (21067004, 21263005) 江西省自然科学基金青年科学基金计划(20133BAB21003) (20133BAB21003) 江西省教育厅高等学校科技落地计划项目(KJLD14046) (KJLD14046) 江西省青年科学家培养项目(20122BCB23015) (20122BCB23015) 江西省远航工程, 江西省研究生创新资金项目(3104000089, 3104100013) (3104000089, 3104100013) 江西理工大学研究生创新资金项目(104100039). (104100039)

Bi₂WO₆ microspheres with a diameter of 1.5-2 μm were prepared by a hydrothermal method, and then coated with different contents of AgCl to form heterostructured AgCl/Bi₂WO₆ microspheres. The prepared Bi₂WO₆ and AgCl/Bi₂WO₆ photocatalysts were characterized by X-ray diffraction, N₂ physical adsorption, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, and ultraviolet-visible diffuse reflectance spectroscopy. The photocatalytic activity of the catalysts was evaluated by photocatalytic degradation of rhodamine B under ultraviolet and visible light irradiation. Results showed that the deposition of AgCl had no obvious effect on the light absorption and surface properties of Bi₂WO₆. However, the heterostructured AgCl/Bi₂WO₆ photocatalysts exhibited considerably higher activity than the pure AgCl and Bi₂WO₆ catalysts. With the optimal AgCl content of 20 wt%, the photocatalytic activity of the heterostructured AgCl/Bi₂WO₆ catalyst was increased under both ultraviolet and visible light compared with that of Bi₂WO₆. The main reason for the enhanced photocatalytic activity is attributed to the formation of AgCl/Bi₂WO₆ heterostructures effectively suppressing the recombination of photogenerated electrons and holes.
- Microsphere,
- Silver chloride,
- Bismuth tungstate,
- Heterostructure,
- Photocatalysis,
- Rhodamine B
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Preparation, characterization and photocatalytic performance of heterostructured AgCl/Bi₂WO₆ microspheres