Coupling CsPbBr3 Quantum Dots with Covalent Triazine Frameworks for Visible‐Light‐Driven CO2 Reduction

Photocatalytic reduction of CO2 into value‐added chemical fuels is an appealing approach to address energy crisis and global warming. CsPbBr3 quantum dots (QDs) are good candidates for CO2 reduction because of their excellent photoelectric properties, including high molar extinction coefficient, low...

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Bibliographic Details
Published inChemSusChem Vol. 14; no. 4; pp. 1131 - 1139
Main Authors Wang, Qi, Wang, Jin, Wang, Ji‐Chong, Hu, Xin, Bai, Yu, Zhong, Xinhua, Li, Zhengquan
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 18.02.2021
Subjects
Adsorption
Carbon dioxide
Catalytic activity
Chemical fuels
CO2 reduction
covalent triazine frameworks
Excitons
fuels
Hybrid systems
Perovskites
Photocatalysis
Photoelectric effect
Photoelectricity
Quantum dots
Reduction
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Summary:Photocatalytic reduction of CO2 into value‐added chemical fuels is an appealing approach to address energy crisis and global warming. CsPbBr3 quantum dots (QDs) are good candidates for CO2 reduction because of their excellent photoelectric properties, including high molar extinction coefficient, low exciton binding energy, and defect tolerance. However, the pristine CsPbBr3 QDs generally have low photocatalytic performance mainly due to dominant charge recombination and lack of efficient catalytic sites for CO2 adsorption/activation. Herein, we report a new photocatalytic system, in which CsPbBr3 QDs are coupled with covalent triazine frameworks (CTFs) for visible‐light‐driven CO2 reduction. In this hybrid photocatalytic system, the robust triazine rings and periodical pore structures of CTFs promote the charge separation in CsPbBr3 and endow them with strong CO2 adsorption/activation capacity. The resulting photocatalytic system exhibits excellent photocatalytic activity towards CO2 reduction. This work presents a new photocatalytic system based on CTFs and perovskite QDs for visible‐light‐driven CO2 reduction, which highlights the potential of perovskite‐based photocatalysts for solar fuel applications. Quantum of Frameworks: Immobilizing CsPbBr3 QDs onto a covalent triazine framework (CTF‐1) provides a promising approach to visible‐light‐driven CO2 reduction. The CsPbBr3 QDs enable CTF‐1 an enhanced visible‐light absorption, and the CTF‐1 promotes the charge separation in CsPbBr3 QDs. The hybrid photocatalyst exhibits a high CO evolution rate. This work presents a new strategy for exploring new types of photocatalysts based on perovskite systems
ISSN:1864-5631
1864-564X
DOI:10.1002/cssc.202002847