摘要
采用水热法制备了Cd掺杂ZnIn_(2)S_(4)光催化剂。利用X射线粉末衍射(XRD)、红外光谱(FT-IR)、扫描电镜(SEM-EDS)、X射线光电子能谱(XPS)、紫外-可见吸收光谱(UV-Vis)及光致发光光谱(PL)等手段对光催化剂进行了表征。结果表明,Cd掺杂虽没有改变ZnIn_(2)S_(4)的晶型,但使禁带宽度变窄,吸收边红移,表面缺陷和氧空位增加,有利于光生载流子的有效分离;而且镉掺杂后催化剂的电化学阻抗减小,有利于光生载流子的快速传输,因此微量Cd掺杂后ZnIn_(2)S_(4)催化降解偶氮胭脂红B的光催化性能明显提高,105 min内降解率可达93%,且循环稳定性好。
Cd-ZnIn_(2)S_(4) is prepared by hydrothermal method and characterized by XRD,FT-IR,SEM-EDS,XPS,UV-Vis,PL,etc.The results show that Cd doping does not change the crystal structure of ZnIn_(2)S_(4),but the absorption edge shifts to red,the forbidden band width is narrowed,and the number of surface defects and oxygen vacancies increase,which is conducive to the effective separation of photogenerated carriers.On the other hand,Cd doping reduces the electrochemical impedance,resulting in the rapid transmission of photogenerated carriers.Therefore,the degradation rate of azocarmine B in Cd-ZnIn_(2)S_(4) is much higher(93%in 105 minutes)than that in ZnIn_(2)S_(4),and the cycle stability of Cd-ZnIn_(2)S_(4) is also very well.
作者
李冬梅
杨磊
王梓良
郭小惠
袁春华
LI Dongmei;YANG Lei;WANG Ziliang;GUO Xiaohui;YUAN Chunhua(School of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology,Baotou 014010, China)
出处
《功能材料》
CAS
CSCD
北大核心
2022年第1期1009-1013,1019,共6页
Journal of Functional Materials
基金
国家自然科学基金项目(32060623)
内蒙古自然科学基金项目(2020MS02016,2020MS02006)。
