Bismuth-modified rectorite with high visible light photocatalytic activity

作者：Wu, Shuxing; Fang, Jianzhang^*; Xu, Weicheng; Cenb, Chaoping

来源：Journal of Molecular Catalysis A: Chemical , 2013, 373: 114-120.

DOI：10.1016/j.molcata.2013.03.012

• Bi2O3
• Bi5O7NO3
• Rectorite
• Visible-light
• Photocatalysis

Herein, we reported an ultrasonic-assisted synthesis of bismuth-modified rectorite with high visible light-induced photocatalytic activity. The as-synthesized samples were characterized by XRD, FT-IR, FESEM, TEM, BET, and UV-vis DRS techniques. Two toxic and nonbiodegradable organic compounds, Rhodamine B (RhB) and 2,4-dichlorophenol (DCP), were chosen as the target pollutants to characterize the adsorption performance and photocatalytic activity. The results showed that the prepared samples possessed strong adsorbility and exhibited high efficient photocatalytic activity under visible light irradiation. The excellent photocatalytic activity of bismuth-modified rectorite was ascribed to the strong adsorption ability, the interconnected heterojunction of Bi2O3 and Bi5O7NO3, and the produced center dot OH. Finally, the possible mechanism was presented.

• 出版日期2013-7
• 单位环境保护部华南环境科学研究所; 华南师范大学