【摘要】 采用简单的化学还原沉积和二次水热的方法成功制备了CdS和Au共同修饰Z型CdS/Au/Bi₂MoO₆（CdS/Au/BMO）光催化剂。通过X射线粉末衍射（XRD）、X射线光电子能谱（XPS）、透射电子显微镜（TEM）、扫描电子显微镜（SEM）等测试技术对其组成、形貌、光吸收特性和光电化学性能等进行系统表征。实验结果表明,CdS/Au/BMO-2复合材料在可见光照射下表现出最佳的降解效率,其降解RhB的速率常数约为BMO的8.8倍和CdS的20倍。Au NPs作为固态电子媒介,为光生电子的传输和转移提供了一个通道,同时Au NPs的表面等离子体共振（SPR）效应和CdS纳米粒子显著拓宽了催化体系对可见光的响应范围;通过对催化剂的组成、结构和光电性能表征,确定了CdS/Au/BMO的能带结构,进而探讨了CdS/Au/BMO活性增强机制。更多还原

【Abstract】 The Z-scheme CdS/Au/Bi₂MoO₆ heterostructure have been successfully synthesized by CdS and Au comodification via a facile chemical reduction deposition and secondary hydrothermal method. X-ray diffraction（XRD）, X-ray photo-electron spectroscopy（XPS）, transmission electron microscope（TEM）, scanning electron microscopy（SEM） and other testing techniques were employed to systematically characterize its composition,morphology, optical absorption characteristics and photoelectrochemical properties. The experimental results showed that CdS/Au/Bi₂MoO₆-2 composite showed the best degradation efficiency under visible light irradiation,and the degradation rate of RhB was about 8.8 and 20 times that of Bi₂MoO₆ and CdS, respectively. As a solid electronic medium, Au NPs provides a channel for the transmission and transfer of photogenerated electrons.Meanwhile, the response range of the catalytic system to visible light was significantly broadened through Au NPs surface plasmon resonance（SPR） effect and CdS nanoparticles. Besides, the energy band structure of CdS/Au/BMO was determined through the characterizations of the composition, photoelectrochemical properties and valance band-XPS results of the as-prepared photocatalyst. Moreover, the mechanism for the enhancement of the photocatalytic activity of CdS/Au/BMO was also discussed by comparison of their photoluminescence spectra and electron spin resonance spectroscopy（ESR） spectra.更多还原