A three-dimensional (3D) structured Bi2WO6-palygorskite composite and their enhanced visible light photocatalytic property

作者：Yang, Yanqing^*; Cui, Jiamin; Jin, Hufang; Cao, Fang

来源：Separation and Purification Technology, 2018, 205: 130-139.

DOI：10.1016/j.seppur.2018.05.027

• Bi2WO6
• Palygorskite
• Photocatalytic
• Adsorption
• Photoactive species

A novel three-dimensional (3D) mesoporous Bi2WO6-palygorskite (Pal) composite with enhanced visible light photocatalytic activity was synthesized by a facile hydrothermal method and was used for the degradation of Rhodamine B (RhB) and tetracycline. The Bi2WO6-Pal composite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmitting electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), nitrogen adsorption-desorption measurements, Fourier transform infrared spectrum measurements (FTIR) and UV-visible diffused reflectance spectra (UV-vis DRS). Compared with pure Bi2WO6 and raw Pal, the Bi2WO6-Pal composite displayed higher adsorption capacity and enhanced photocatalytic activity in the decomposition of RhB and tetracycline. The enhanced performance was contributed to the incorporated Pal facilitated the organic contaminants adsorbed on the photocatalytic active sites. More importantly, the Bi2WO6-Pal composite still kept better stability and high photocatalytic activity even after four cycled experiments, which indicates that the prepared Bi2WO6-Pal composite has a great potential for degradation of organic contaminants in water. Furthermore, the possible photodegradation mechanism was discussed based on the properties of Bi2WO6-Pal and the photoactive species test.

• 出版日期2018-10-31
• 单位太原理工大学