摘要
为了拓展对可见光的吸收范围、抑制光生载流子的复合,并增强催化剂的光催化性能,通过将CdS原位生长于In_(2)O_(3)表面的方法制备出In_(2)O_(3)/CdS催化剂。结果表明:在可见光照射60 min后,In_(2)O_(3)/CdS异质结对盐酸强力霉素的去除效率达84.0%,远高于In_(2)O_(3)和CdS单体的降解效率,降解过程符合一级动力学。In_(2)O_(3)/CdS对盐酸强力霉素的降解速率常数为0.028 min^(-1),分别为In_(2)O_(3)和CdS单体的13.7倍和1.5倍。自由基捕获实验表明:·O^(-)_(2)和·OH是主要的活性基团,光催化性能的提高主要得益于Z型异质结的形成,有效加速了光生电子和空穴的转移和分离效率。
To expand the absorption range of visible light,inhibit the recombination of photogenerated carriers,and enhance the photocatalytic performance of the catalyst,In_(2)O_(3)/CdS was prepared by the in-situ deposition of CdS onto In_(2)O_(3)surface.The results showed that the degradation efficiency of In_(2)O_(3)/CdS heterojunction toward doxycycline hyd-rochloride reached 84.0%under the irradiation of visible light for 60 min,which was far higher than those of In_(2)O_(3)and CdS.And,the degradation process conformed to the first-order kinetics.The degradation rate constant of In_(2)O_(3)/CdS toward doxycycline hydrochloride was 0.028 min^(-1),which was 13.7 and 1.5 times higher than those of In_(2)O_(3)and CdS,respectively.In addition,free radical capture experiment showed that superoxide free radicals and hydroxyl free radi-cals were the main active species.The improvement of photocatalytic performance of In_(2)O_(3)/CdS was attributed to the formation of Z-scheme heterojunction,which accelerated the transfer and separation of photogenerated electrons and holes.
作者
潘紫薇
顾心童
张雪莹
盛铭军
吴小敏
黄继会
王伟
郭永福
Pan Ziwei;Gu Xintong;Zhang Xueying;Sheng Mingjun;Wu Xiaomin;Huang Jihui;Wang Wei;Guo Yongfu(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;United Design Group(Wuhan)Co.,Ltd.,Wuhan 430014,China;Suzhou Water Supply and Drainage Management Office,Suzhou 215004,China;Suzhou Drainage Co.,Ltd.,Suzhou 210021,China)
出处
《工业水处理》
CAS
CSCD
北大核心
2021年第9期92-97,共6页
Industrial Water Treatment
基金
苏州市科技局民生科技项目(SS201802)
江苏省大学生创新训练计划项目(201810332039Y)。
