Ag/Ag2MoO4/Bi2MoO6复合光催化剂的制备及其光催化性能

采用水热、化学沉积和原位光还原的方法成功制备了新型Ag/Ag₂MoO₄/Bi₂MoO₆三元复合光催化剂。通过X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）和紫外可见漫反射光谱（UV-Vis DRS）等技术对材料的组成、形貌、光吸收特性和光电化学性能等进行系统分析。以四环素为目标污染物，研究Ag/Ag₂MoO₄/Bi₂MoO₆在可见光下的光催化性能。研究结果表明，相比于纯Ag₂MoO₄和Bi₂MoO₆，Ag的表面等离子体共振（SPR）效应显著拓宽了催化体系对可见光的吸收能力及响应范围。当Ag₂MoO₄理论负载量（质量分数）为24.6%时，Ag/Ag₂MoO₄/Bi₂MoO₆复合材料在20 min内可将四环素完全降解，且5次循环使用后仍保持较高的催化活性，表现出良好的循环稳定性。

Preparation and Photocatalytic Activity of Ag/Ag2MoO4/Bi2MoO6 Composite Photocatalyst

A novel Ag/Ag₂MoO₄/Bi₂MoO₆ ternary photocatalyst was successfully prepared by hydrothermal, chemical deposition and in-situ photoreduction process. The as-prepared photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and UV-visible diffuse reflection spectroscopy (UV-Vis DRS) to investigate the composition, morphology, optical absorption characteristics and photoelectrochemical properties. The photocatalytic performance of Ag/Ag₂MoO₄/Bi₂MoO₆ photocatalyst was evaluated with tetracycline as the target pollutant under visible light. The research results show that, compared with pure Ag₂MoO₄ and Bi₂MoO₆, the surface plasmon resonance (SPR) effect of Ag significantly broadens the visible light absorption capacity and response range of the catalytic system. When the theoretical loading (mass fraction) of Ag₂MoO₄ was 24.6%, Ag/Ag₂MoO₄/Bi₂MoO₆ ternary photocatalyst could completely degrade tetracycline within 20 min, and maintained high catalytic activity after 5 cycles of use, showing good cycle stability.