光催化
X射线光电子能谱
氧化还原
光化学
电子顺磁共振
材料科学
可见光谱
二氧化碳
辐照
化学
催化作用
光电子学
化学工程
无机化学
核磁共振
物理
有机化学
核物理学
工程类
作者
Jia Song,Ying Lü,Yuan Lin,Qianwen Liu,Xuxu Wang
标识
DOI:10.1016/j.apcatb.2021.120185
摘要
The overall conversion of carbon dioxide (CO2) with pure water to hydrocarbons is one of the most challenging reactions in the field of photocatalysis. Herein, LaTiO2N coupled with α-Fe2O3 is reported to achieve the overall conversion of gas phase CO2 without sacrificial agents under visible light irradiation. The optimal α-Fe2O3/LaTiO2N sample exhibits the yields of CO and CH4 up to 29.0 and 38.0 μmol g−1 under illumination for 3 h, with a total utilized photoelectron number (UPN) of 362.0 μmol g−1. The superior photocatalytic performance can be due to the efficient coupling of photocatalytic CO2 reduction and H2O oxidation over LaTiO2N and α-Fe2O3, respectively. Strong evidence of Z-scheme charge transfer pathway is illustrated by XPS, photoelectrochemical characterization, TRPL, Kelvin probe technique (KP), EPR and photoinduced redox probe reactions. This work is expected to provide new insights into promoting the photocatalytic performance of LaTiO2N by modulating the charge carrier dynamics.
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