Abstract
Cuprous oxide is a potential photocatalyst for the reduction of CO2. However, its high rate of charge recombination and low ability to adsorb CO2 limit its activity, particularly when gaseous CO2 was used. Herein, a Cu-based metal-organic framework (Cu-MOF-74) with high CO2 adsorption is coated onto Cu2O nanowires by a topotactic transformation method. The optimized Cu2O@Cu-MOF-74 composite thin film showed a CH4 evolution rate 4.5 times higher than that of bare Cu2O under visible light illumination (>420 nm), with water vapor as the electron donor. Analysis results of electrochemical impedance spectroscopy, transient photocurrent measurements, and fluorescence spectroscopy collectively suggest that the decoration of Cu2O with Cu-MOF-74 facilitates electron extraction from excited Cu2O, thereby inducing long-lived photocharges for the reduction of CO2. This study provides insights into the modification of transition metal oxides for application in photocatalysis by coating the surface with metal-organic frameworks.
Original language | English (US) |
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Pages (from-to) | 126-133 |
Number of pages | 8 |
Journal | ChemPhysMater |
Volume | 2 |
Issue number | 2 |
DOIs | |
State | Published - Apr 2023 |
Bibliographical note
Publisher Copyright:© 2022
Keywords
- Charge transport
- CO conversion
- Metal oxide
- Metal-organic framework
- Photocatalysis
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics