Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 309, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121267
Keywords
Photocatalysis; External fields; Monolithic catalysts; ZnO; CO2 reduction
Funding
- National Natural Science Foundation of China [22078057, 21576050, 51602052]
- Fundamental Research Funds for the Central Universities of China [3207045403, 3207045409, 3207046414]
- Foundation of Jiangsu Key Laboratory for Biomass Energy [JSBEM202001]
- Priority Academic Program Development of Jiangsu Higher Education In-stitutions (PAPD) , Zhongying Young Scholars of Southeast University, Applied Basic Research Program of Suzhou [SYG202026]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [SJCX20_0014, SJCX20_0015]
- Jiangsu Province of China [6907041203]
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In this study, a monolithic photocatalyst that can simulate the respiratory process was synthesized to accelerate the adsorption of CO2 and desorption of CH4 during photocatalytic reaction. By coupling the external magnetic field, a photo-thermal-magnetic field synergy was achieved, leading to improved charge transfer behavior and increased breathing efficiency. The monolithic NF@ZnO/Au@ZIF-8 photocatalyst exhibited high stability and selectivity.
Gas adsorption/desorption process and conversion efficiency of solar energy are crucial to photocatalytic CO2 conversion. Here, we report the synthesis of a metal-organic-framework based monolithic NF@ZnO/Au@ZIF-8 photocatalyst that can simulate the respiratory process to accelerate adsorption of CO2 and desorption of CH4 during the photocatalytic reaction. Particularly, this selective-breathing monolithic photocatalyst could coupling external magnetic field into the photocatalytic process, achieving photo-thermal-magnetic field synergy in the reaction system. Upon this photo-thermal-magnetic coupling, the temperature of surface reaction could be elevated to about 180 degrees C, leading to a drastically improved charge transfer behavior and the significantly increased breathing efficiency. The yield of CH4 over the selective-breathing monolithic NF@ZnO/Au@ZIF-8 photocatalyst reaches 270.02 mu mol/g with a high stability and a high selectivity up to 89.72%. This study provides an ideal approach for the design of monolithic catalysts not only with balanced gas adsorption desorption property, but also endowed with multi-field coupling ability.
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