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

doi:10.1016/S1872-2067(15)60849-X

Chinese Journal of Catalysis ›› 2015, Vol. 36 ›› Issue (7): 987-993.DOI: 10.1016/S1872-2067(15)60849-X

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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

a School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, Jiangxi, Ganzhou 341000, Jiangxi, China;
b State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, Fujian, China

Received:2015-02-25 Revised:2015-03-27 Online:2015-06-12 Published:2015-07-30
Supported by:
This work was supported by the National Natural Science Foundation of China (21067004, 21263005), the Young Science and Technology Project of Jiangxi Province Natural Science Foundation China (20133BAB21003), The Landing Project of Science and Technology of Colleges and Universities in Jiangxi Province (KJLD14046), Young Scientist Training Project of Jiangxi Province (20122BCB23015), Yuanhang Engineering of Jiangxi Province, Graduate innovation project of Jiangxi Province (3104000089, 3104100013) and Graduate innovation project of Jiangxi University of Science and Technology (3104100039).

Abstract

Abstract:

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.

Key words: Microsphere, Silver chloride, Bismuth tungstate, Heterostructure, Photocatalysis, Rhodamine B

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.

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

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