KBr辅助水热法制备Cd_(0.5)Zn_(0.5)S固溶体及可见光制氢性能  

KBr-assisted synthesis of Cd_(0.5)Zn_(0.5)S solid solution photocatalyst and its visible-light activity for hydrogen evolution

作　　者：刘晓燕[1] 陶伟峰[1] 李越湘[1] 彭绍琴[1] 

机构地区：[1]南昌大学化学系,江西南昌330031

出　　处：《南昌大学学报（理科版）》2013年第5期457-460,共4页Journal of Nanchang University(Natural Science)

基　　金：国家自然科学基金资助项目(21163012);国家重点基础研究发展规划项目(2009CB220003);江西省自然科学基金资助项目(2007GZH1754)

摘　　要：采用KBr辅助水热法制备了Cd0.5Zn0.5S固溶体光催化剂。通过XRD、SEM、UV-Vis漫反射、比表面积、荧光光谱对催化剂进行了表征。考查了催化剂可见光下分解水制氢活性。结果发现KBr的存在促进了Cd0.5Zn0.5S中ZnS(111)晶面的生长,提高了催化剂的还原能力,减少了催化剂的非辐射跃迁,从而提高了催化剂的制氢活性。Cd0.5Zn0.5S solid solution photocatalysts were synthesized by a hydrothermal method assisted by the KBr.The products were characterized by XRD,SEM,UV-Vis absorption spectrometry、BET and fluorescence spectra.Their photoactivities were evaluated by hydrogen evolution from water under visible light（λ≥420nm）irradiation.It is found that the presence of KBr promotes the growth of ZnS（111）crystal facet in Cd0.5Zn0.5S solid solution and reduces nonradiative transition of the catalyst,thus the visible light photocatalytic activity of Cd0.5Zn0.5S are enhanced.

关 键 词：KBr辅助 Cd0 5Zn0 5S固溶体 光催化 制氢 

分 类 号：O643[理学—物理化学]