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
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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.
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