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。
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.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2014年第1期20-24,共5页
Journal of Functional Materials
基金
国家自然科学基金资助项目(20976057)
