Cs_(2)CuBr_(4)perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO_(2)photoconversion  

作　　者：Zhijie Zhang Xun Li Huiling Tang Junhao Wu Chunxia Yao Kui Li 

机构地区：[1]School of Materials Science and Engineering,Shanghai Institute of Technology,Shanghai 201418,China [2]Institute for Agro-food Standards and Testing Technology,Shanghai Academy of Agricultural Sciences,Shanghai 201403,China [3]School of Chemistry and Chemical Engineering,Hainan University,Haikou 570228,China

出　　处：《Chinese Chemical Letters》2024年第11期582-587,共6页中国化学快报（英文版）

基　　金：financially supported by Natural Science Foundation of Shanghai(No.22ZR1460700);Shanghai Institute of Technology(No.XTCX2022-28)。

摘　　要：Heterojunction engineering is recognized as a promising strategy to modulate the photocatalytic properties of semiconductors.Herein,lead-free Cs_(2)CuBr_(4)perovskite quantum dots(PQDs)were confined in a mesoporous CuO framework and a p-n type S-scheme heterojunction of Cs_(2)CuBr_(4)/CuO(CCB/CuO)photocatalyst was fabricated.Experimental characterizations confirmed the effective confinement of the Cs_(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 Cs_(2)CuBr_(4).Owing to the outstanding charge transport property and CO_(2)adsorption capacity,the developed CCB/CuO heterojunction exhibited remarkably enhanced photocatalytic CO_(2)conversion efficiency with an electron consumption rate(R_(electron))of 281.1μmol g^(-1)h^(-1),which was approximately2.8 times higher than that of pristine Cs_(2)CuBr_(4).These findings provide some insights into the rational engineering design of lead-free perovskite-based heterostructures for efficient photocatalytic CO_(2)conversion.

关 键 词：Photocatalytic CO_(2)conversion Mesoporous CuO Cs_(2)CuBr_(4) Perovskite quantum dots S-scheme heterojunction 

分 类 号：X701[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]