Cs2 CuBr4 perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO2 photoconversion

文献类型： 外文期刊

第一作者： Zhang, Zhijie

作者： Zhang, Zhijie;Li, Xun;Tang, Huiling;Tang, Huiling;Yao, Chunxia;Wu, Junhao;Li, Kui

作者机构：

关键词： Photocatalytic CO 2 conversion; Mesoporous CuO; Cs 2 CuBr 4; Perovskite quantum dots; S -scheme heterojunction

期刊名称：CHINESE CHEMICAL LETTERS （ 影响因子：9.4； 五年影响因子：7.3 ）

ISSN： 1001-8417

年卷期： 2024 年 35 卷 11 期

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收录情况： SCI

摘要： Heterojunction engineering is recognized as a promising strategy to modulate the photocatalytic properties of semiconductors. Herein, lead-free Cs2CuBr4 2 CuBr 4 perovskite quantum dots (PQDs) were confined in a mesoporous CuO framework and a p-n type S-scheme heterojunction of Cs2CuBr4/CuO 2 CuBr 4 /CuO (CCB/CuO) photocatalyst was fabricated. Experimental characterizations confirmed the effective confinement of the Cs2CuBr4 2 CuBr 4 PQDs in the mesoporous CuO framework, which enabled intimate contact in the interface of CCB/CuO heterojunction, thus facilitating the interfacial charge migration and separation between p-type CuO and n-type Cs2CuBr4. 2 CuBr 4 . Owing to the outstanding charge transport property and CO2 2 adsorption capacity, the developed CCB/CuO heterojunction exhibited remarkably enhanced photocatalytic CO2 2 conversion efficiency with an electron consumption rate ( R electron ) of 281.1 }mol g -1 h -1 , which was approximately 2.8 times higher than that of pristine Cs2CuBr4. 2 CuBr 4 . These findings provide some insights into the rational engineering design of lead-free perovskite-based heterostructures for efficient photocatalytic CO2 2 conversion. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.

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