【摘要】 采用水热合成法制备ZnIn2S4光催化剂,PdS、SrS、Pt、Ru被分别负载到ZnIn2S4催化剂表面,并制备了PdS和贵重金属共同负载的样品。用X射线衍射(XRD)、X射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-Vis)等技术对其进行了表征,结果表明,所有样品都具有相似的晶体结构和光学性质。XPS结果证实了PdS成功地负载到了ZnIn2S4表面。讨论了助催化剂负载量对催化性能的影响,负载0.5%(质量分数)PdS和0.5%(质量分数)Pt时产生的协同效应,使ZnIn2S4催化剂产氢速率最大,为1.79mmol/h,是无负载时的19倍。并对协同作用机理进行了讨论。更多还原

【Abstract】 ZnIn 2 S 4 was synthesized by hydrothermal method. PdS,SrS,Pt,Ru were respectively loaded onto ZnIn 2 S 4 as cocatalyst. PdS and noble metal co-loaded photocatalyst were also prepared. The samples were characterized by X-ray diffraction( XRD),X-ray photoelectron spectroscopy( XPS) and UV-visible diffuse reflectance spectroscopy( UV-Vis). The results indicated that all the samples were of the same crystalloid structures and optical properties. The formation of PdS could be evidenced by XPS analysis results. PdS and noble metal co-loaded can interact with each other and cooperate on improving the photocatalytic activity. The highest photocatalytic activity was observed on ZnIn 2 S 4 co-loaded with 0. 5 wt% PdS and 0. 5 wt% Pt,with the rate of hydrogen evolution to be 1. 79 mmol / h,which was ca. 19 times more than that of ZnIn 2 S 4. The possible coordinated mechanism was discussed.更多还原