采用水热合成法制备 ZnIn2 S4光催化剂, PdS、SrS、Pt、Ru 被分别负载到 ZnIn2 S4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 ZnIn2 S4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 ZnIn2 S4催化剂产氢速率最大,为1．79 mmol/h,是无负载时的19倍.并对协同作用机理进行了讨论.
ZnIn2 S4 was synthesized by hydrothermal method.PdS,SrS,Pt,Ru were respectively loaded onto ZnIn2 S4 as cocatalyst.PdS and noble metal co-loaded photocatalyst were also prepared.The samples were char-acterized by X-ray diffraction (XRD),X-ray photoelectron spectroscopy (XPS)and UV-visible diffuse reflec-tance 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 pho-tocatalytic activity was observed on ZnIn2 S4 co-loaded with 0.5 wt% PdS and 0.5 wt% Pt,with the rate of hy-drogen evolution to be 1.79 mmol/h,which was ca.1 9 times more than that of ZnIn2 S4 .The possible coordina-ted mechanism was discussed.
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