Citation: Zhijie Zhang, Xun Li, Huiling Tang, Junhao Wu, Chunxia Yao, Kui Li. Cs₂CuBr₄ perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO₂ photoconversion[J]. Chinese Chemical Letters, ;2024, 35(11): 109700. doi: 10.1016/j.cclet.2024.109700 shu

Cs₂CuBr₄ perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO₂ photoconversion

Zhijie Zhang ^a ,
Xun Li ^a ,
Huiling Tang ^{a, b} ,
Junhao Wu ^c ,
Chunxia Yao ^{b, *,} ,
Kui Li ^{c, *,}

a.
School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 201418, China
b.
Institute for Agro-food Standards and Testing Technology, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
c.
School of Chemistry and Chemical Engineering, Hainan University, Haikou 570228, China

chunxiayao2007@saas.sh.cn

kuili@hainanu.edu.cn

Received Date: 9 November 2023
Revised Date: 30 November 2023
Accepted Date: 3 January 2024
Available Online: 8 March 2024

Figures(4)

Heterojunction engineering is recognized as a promising strategy to modulate the photocatalytic properties of semiconductors. Herein, lead-free Cs₂CuBr₄ perovskite quantum dots (PQDs) were confined in a mesoporous CuO framework and a p-n type S-scheme heterojunction of Cs₂CuBr₄/CuO (CCB/CuO) photocatalyst was fabricated. Experimental characterizations confirmed the effective confinement of the Cs₂CuBr₄ 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. Owing to the outstanding charge transport property and CO₂ adsorption capacity, the developed CCB/CuO heterojunction exhibited remarkably enhanced photocatalytic CO₂ conversion efficiency with an electron consumption rate (R_electron) of 281.1 µmol g⁻¹ h⁻¹, which was approximately 2.8 times higher than that of pristine Cs₂CuBr₄. These findings provide some insights into the rational engineering design of lead-free perovskite-based heterostructures for efficient photocatalytic CO₂ conversion.
- Photocatalytic CO₂ conversion,
- Mesoporous CuO,
- Cs₂CuBr₄,
- Perovskite quantum dots,
- S-scheme heterojunction
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Cs2CuBr4 perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO2 photoconversion

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通讯作者: 陈斌, bchen63@163.com

Cs₂CuBr₄ perovskite quantum dots confined in mesoporous CuO framework as a p-n type S-scheme heterojunction for efficient CO₂ photoconversion