光催化
异质结
材料科学
量子点
可见光谱
吸收(声学)
吸附
量子产额
纳米技术
光化学
化学工程
催化作用
光电子学
化学
复合材料
光学
有机化学
物理
荧光
工程类
作者
Xiaofeng Wang,Jingwen Jiang,Qijun Xu,Lingyan Duan,Hong Guo
标识
DOI:10.1016/j.apsusc.2022.154601
摘要
Inclusive quantum dots hollow CN@CIZS heterojunction has been successfully prepared and for accelerating photocatalytic CO 2 reduction. It exhibits excellent photocatalytic performance. • The heterojunction between hollow g-C 3 N 4 and CuInZnS QDs is successful designed, and exhibits outstanding CO 2 RR performance. • The hollow architecture affords a larger specific surface area and enhances light absorption for photocatalysis. • CuInZnS QDs can increase the adsorption and activation capacity of CO 2 on hollow g-C 3 N 4 . • Optimization of the photocatalytic performance was strongly demonstrated by in-situ DRIFTS and other photochemical tests. Photocatalytic conversion of carbon dioxide (CO 2 ) to fuel or useful chemicals is of great significance for energy and environmental issues. Herein, we successfully prepare a hollow g-C 3 N 4 @Cu-In-Zn-S quantum dots (CN@CIZS QDs) photocatalytic heterojunction employing the method of electrostatic self-assembly. The hollow structure, multiple exciton effect of quantum dots and the discrepancy of band structure generate excellent photocatalytic performance. The yield of CO 2 photocatalytic reduction to CO and CH 4 respectively is 23.04 μmol g -1 and 13.92 μmol g -1 after simulated visible light irradiation for 6 hours for hollow CN@CIZS QDs 20 wt% sample. Moreover, the results of in-situ characterization and other photochemical tests strongly demonstrate the significant optimization of the photocatalytic performance. The research offers a feasible green thought for the resource utilization of CO 2 .
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