通过简单的溶剂热-原位沉积-光致还原法成功合成了一种新型等离子体光催化剂Ag/AgBr/Bi₂MoO₆。利用X射线衍射、X射线光电子能谱、扫描电镜、透射电镜和高分辨透射电镜、紫外-可见漫反射光谱和荧光光谱对Ag/AgBr/Bi₂MoO₆催化剂的物理性质和光物理性质进行表征和分析。研究了Ag/AgBr/Bi₂MoO₆复合材料对罗丹明B的光催化降解活性。结果表明，Ag/AgBr质量分数为30%时光催化性能最优，其复合材料的光催化效率是纯Bi₂MoO₆的6.4倍。Ag/AgBr/Bi₂MoO₆复合材料的高活性主要归因于协同作用诱导的光生电子-空穴对的有效分离。基于Ag纳米粒子表面的等离子体共振效应理论，探讨了Ag/AgBr的引入改善Bi₂MoO₆光催化活性可能的机理。

Ag/AgBr/Bi₂MoO₆,a novel plasma photocatalyst,is successfully synthesized via a simple solvothermal-in situ deposition-photo-reduction method.The physical and photophysical properties of Ag/AgBr/Bi₂MoO₆ samples are characterized and analyzed by X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS),scanning electron microscopy (SEM),transmission electron microscopy (TEM),high resolution transmission electron microscopy (HRTEM),ultraviolet-visible diffuse reflection spectroscopy (DRS) and photoluminescence emission spectra (PL).Photocatalytic activity of Ag/AgBr/Bi₂MoO₆ catalyst in degradation of Rhodamine B is studied.It is found that the Ag/AgBr/Bi₂MoO₆ composite containing 30wt% of Ag/AgBr can give the highest photocatalytic efficiency,being 6.4 times that of pure Bi₂MoO₆.The high activity of Ag/AgBr/Bi₂MoO₆ composite can be mainly attributed to the effective separation of photogenerated electron-hole pairs induced by synergism.Based on the theory of plasma resonance effect on the surface of Ag nanoparticles,the possible mechanism that Ag/AgBr helps to improve Bi₂MoO₆ photocatalytic activity is discussed.

黄建舒(1992-),男,硕士研究生,研究方向为工业水污染控制,784922329@qq.com