1. Constructing CoAl-LDO/MoO3−x S-scheme heterojunctions for enhanced photocatalytic CO2 reduction.
- Author
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Li, Chu-fan, Guo, Rui-tang, Zhang, Zhen-rui, Wu, Tong, Liu, Yi-lei, Zhou, Zong-chang, Aisanjiang, Maitiyasheng, and Pan, Wei-guo
- Subjects
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PHOTOREDUCTION , *HETEROJUNCTIONS , *SURFACE plasmon resonance , *CARBON dioxide , *ENERGY shortages , *PHOTOCATALYTIC oxidation - Abstract
[Display omitted] Converting CO 2 into chemicals and fuels by solar energy can alleviate global warming and solve the energy crisis. In this work, CoAl-LDO/MoO 3−x (LDO/MO) composites were successfully prepared and achieved efficient CO 2 reduction under visible light. The CoAl-layered double oxides (CoAl-LDO) evolved from CoAl-layered double hydroxide (CoAl-LDH) exhibited a more robust structure, broader light absorption, and improved CO 2 adsorption ability. The local surface plasmon resonance (LSPR) effect excited by nonstoichiometric MoO 3−x broadened the photo-response range of CoAl-LDO/MoO 3−x. In addition, constructing step-scheme (S-scheme) heterojunctions could simultaneously optimize the migration mechanism of photogenerated electrons and holes, and retain carriers with strong redox ability. Therefore, the production rates of CO and CH 4 on the optimal LDO/MO composite were 7 and 9 times higher than the pristine CoAl-LDH, respectively. This work hybridizes oxidation photocatalysts and LDO-based materials to optimize the charge separation and migration mechanisms, which guides the modification of LDO-based materials. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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