期刊
JOURNAL OF CATALYSIS
卷 389, 期 -, 页码 440-449出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2020.06.026
关键词
CO2 conversion; Photocatalysis; Carbon nitride; Solar fuel; Z-scheme systems
资金
- National Natural Science Foundation of China [21673142, 21972166, 21872163]
- Beijing Natural Science Foundation [2202045]
- PetroChina Innovation Foundation [2018D-5007-0505]
- Science Foundation of China University of Petroleum, Beijing [242017QNXZ02, 2462018BJC005]
The artificial photosynthesis for visible-light-driven CO2 reduction with H2O is promising to solve both energy and environmental issues simultaneously. Herein, we have successfully fabricated all-solid-state Z-scheme ternary photocatalysts, consisting of two isolated photochemical systems of graphitic carbon nitride (g-C3N4) and three-dimensional ordered macroporous carbon-coated TiO2 (3DOM-TiO2@C) combined with Pt nanoparticles as electron-transfer system. Photonic crystal structure and carbon-coated nanolayers of 3DOM-TiO2@C support enhance visible light-harvesting efficiency. The vectorial photoelectron transferring of TiO2@C -> Pt -> g-C3N4 boosts the separation and surface enrichment efficiencies of photogenerated electrons and holes. All-solid-state Z-scheme ternary photocatalyst exhibits the outstanding yields of CH4 (6.56 mu mol h(-1), 0.1 g catalyst) and high-efficient quantum efficiency (5.67%) during visible-light-driven conversion of CO2 with H2O. The surface enrichment of electrons and CO2 is the rate-determining step of selective CO2 photoreduction. This study is expected to throw new light on the fabrication of high-efficient photocatalyst for CO2 conversion to hydrocarbon. (C) 2020 Elsevier Inc. All rights reserved.
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