期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 826, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.154204
关键词
Bi4O5Br2; Mn-doped; NO removal; Density functional theory
资金
- National Natural Science Foundation of China [11847058, 11774054, 61664008]
- Natural Science Foundation of Hubei Province, China [2019CFB225, 2018CFB712]
- Scientific Research Foundation of the Education Department of Sichuan Province [18CZ0030]
- Scientific and Technological Innovation Team of Yan'an city of China [2017CXTD-01]
This study investigates the photocatalytic activity of a novel Mn-doped Bi4O5Br2 material prepared via a facile synthesis process. The experimental and theoretical results confirm that Mn doping enhances the efficiency of NO removal over a Bi4O5Br2 catalyst under visible light irradiation. The SEM (scanning electron microscopy), BET (Brunauer-Emmet-Teller), XRD (X-ray diffraction) analyses show that neither the surface morphology nor the phase of the photocatalytic material changes after the incorporation of Mn. The ESR (electron spin resonance) and UPS (Ultraviolet photoelectron spectroscopy) results show that the electrons in the CBM (conduction band minimum) can be directly captured by O-2 to produce large amounts of center dot O-2 radicals, and center dot OH radicals are formed via the route of center dot O (($) over bar) -> H2O2 ->center dot OH. The higher efficiency of Mn-doped Bi4O5Br2 is driven by the reduced band gap, widened visible light absorption range, higher intensity of visible light absorption, and enhanced separation efficiency of electrons and holes in this material compared with those of pristine Bi4O5Br2.(C) 2020 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据