光催化
分解
催化作用
单斜晶系
微晶
热液循环
吸附
半导体
材料科学
化学工程
载流子
光化学
化学
物理化学
光电子学
结晶学
晶体结构
有机化学
工程类
冶金
作者
Lu Wang,Jixing Liu,Weiyu Song,Hong Wang,Yan Li,Zhen Zhao,Junbin Tan,Zhichen Duan,Jian Deng
标识
DOI:10.1016/j.cej.2019.02.038
摘要
A series of BiVO4 semiconductor photocatalysts with different crystallographic forms and crystallite sizes are designed and controllably constructed by a facile hydrothermal method, and their photocatalytic activities are examined for N2O decomposition. It is found that monoclinic BiVO4 prepared at 150 °C shows the highest activity because of its strongest adsorption ability for visible light and highest separation efficiency for photogenerated charge carriers, which achieves 26.7% N2O conversion at 25 °C after 12 h of irradiation. Oxygen vacancy significantly influences the photocatalytic performance of N2O decomposition, which can not only promote the formation of excess electrons but also reduce the activation energy barrier. Moreover, DFT + U calculation is employed to explore the electronic properties of the catalyst at the microscopic level, as well as the reaction pathway of N2O decomposition over these photocatalysts, is illustrated.
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