光催化
石墨氮化碳
可见光谱
三元运算
氮化碳
人工光合作用
化学
量子效率
电子转移
催化作用
纳米颗粒
化学工程
材料科学
纳米技术
光化学
碳纤维
光电子学
有机化学
复合材料
工程类
复合数
程序设计语言
计算机科学
作者
Chujun Wang,Xi Liu,Wenjie He,Yilong Zhao,Yuechang Wei,Jing Xiong,Jian Liu,Jianmei Li,Weiyu Song,Xiao Zhang,Zhen Zhao
标识
DOI:10.1016/j.jcat.2020.06.026
摘要
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 μmol 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.
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