Enhanced visible light photocatalytic activity of AgI/TiO2 composite fabricated by a grinding method

IF 2.4 4区 环境科学与生态学 Q2 WATER RESOURCES
Jin Xu, Dasheng Gao, Shuang Cui, Xiaohua Wang, Ningning Liu
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引用次数: 1

Abstract

Through a simple grinding method, AgI/TiO2 composites were successfully synthesized. The as-prepared AgI/TiO2 composites were used as photocatalysts for Rhodamine B (RhB) degradation under visible light irradiation and exhibited excellent photocatalytic performance. In the presence of composites, almost 100% RhB was decomposed after 60 min. The photocatalytic activity of AgI/TiO2-0.5 composite was optimal, which was 9.5 times higher than that of pristine TiO2, and 15.6 times higher than that of AgI. Moreover, experimental results revealed that the improved photocatalytic activity was not only ascribed to the loading AgI but also resulted from the method that enabled the exposure of more active sites in the composites. In addition, the intimate interfacial contact obtained by this method could also promote the efficient separation of photogenerated electron-hole pairs. Moreover, the possible photocatalytic active species and the stability of the photocatalyst were investigated in detail.
研磨法制备的AgI/TiO2复合材料增强可见光催化活性
通过简单的研磨方法,成功合成了AgI/TiO2复合材料。制备的AgI/TiO2复合材料作为光催化剂,在可见光照射下降解罗丹明B (Rhodamine B, RhB),表现出优异的光催化性能。在复合材料存在的情况下,60 min后RhB几乎100%被分解。AgI/TiO2-0.5复合材料的光催化活性最佳,比原始TiO2高9.5倍,比AgI高15.6倍。此外,实验结果表明,光催化活性的提高不仅归因于负载AgI,还归因于使复合材料中暴露更多活性位点的方法。此外,该方法所获得的亲密界面接触也能促进光生电子-空穴对的有效分离。此外,还对可能的光催化活性物质和光催化剂的稳定性进行了详细的研究。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
4.50
自引率
8.70%
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