Interface and Defect Engineering of a Hollow TiO2@ZnIn2S4 Heterojunction for Highly Enhanced CO2 Photoreduction Activity

被引:31
作者
Du, Jun [1 ]
Shi, Hainan [1 ]
Wu, Jiaming [1 ]
Li, Keyan [1 ]
Song, Chunshan [1 ,2 ]
Guo, Xinwen [1 ]
机构
[1] Dalian Univ Technol, Frontier Sci Ctr Smart Mat, PSU DUT Joint Ctr Energy Res, Sch Chem Engn,State Key Lab Fine Chem, Dalian 116024, Peoples R China
[2] Chinese Univ Hong Kong, Fac Sci, Dept Chem, Hong Kong 999077, Peoples R China
关键词
hollow; calcination; interface; sulfur vacancies; CO2; photoreduction; CHARGE SEPARATION; VACANCY DEFECTS; COATED-CDS; ZNIN2S4; LATTICE; REDUCTION; SPHERES;
D O I
10.1021/acssuschemeng.2c06693
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Rational engineering of the interfaces or defects of heterojunctions provides an effective strategy to improve their photocatalytic performance but is still a challenge. Herein, we present an ingenious calcination strategy of simultaneously introducing sulfur vacancies and enhancing the interfacial interaction for a hollow TiO2@ZnIn2S4 heterojunction, thus greatly improving the photocatalytic CO2 reduction activity. The low-temperature calcination strategy makes the heterojunction possess both abundant sulfur vacancies and strong interfacial interaction, which lead to an enhanced CO2 photoreduction activity with a CO evolution rate of 1330 mu mol g-1 h-1, much higher than that of the sample without calcination treatment (639 mu mol g-1 h-1). The significantly boosted photocatalytic performance can be ascribed to the improved transfer and separation of photogenerated charges resulting from the intimate heterojunction interface, as well as the strengthened visible-light absorption due to the rich sulfur vacancies. This work presents a feasible and convenient method to optimize the performance of the heterojunction photocatalysts by designing the interfaces and defects.
引用
收藏
页码:2531 / 2540
页数:10
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