<![CDATA[Highly efficient (BiO) <ce:inf loc="post">2</ce:inf>CO <ce:inf loc="post">3</ce:inf>-BiO <ce:inf loc="post">2-x</ce:inf>-graphene photocatalysts: Z-Scheme photocatalytic mechanism for their enhanced photocatalytic removal of NO]]> 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications
年/卷/期
2019 / 240 /
页码
241-252
ISSN号
0926-3373
作者单位
School of Physics and Information Technology, Shaanxi Normal University;School of Physics and Information Technology, Shaanxi Normal University;School of Physics and Information Technology, Shaanxi Normal University;School of Physics and Information Technology, Shaanxi Normal University;College of Physics and Electronic Information, Yan'an University;State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences;State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences;Department of Physics and Oxide Research Center, Hankuk University of Foreign Studies;
作者
Yuefa Jia;Shiping Li;Jianzhi Gao;Gangqiang Zhu;Fuchun Zhang;Xianjin Shi;Yu Huang;Chunli Liu;
摘要
NO removal is one of the most important issues in dealing with air pollution. In this report, Z-scheme (BiO)2CO3-BiO2-x-graphene (BOC-BiO2-x-GR) composite photocatalyst was designed for NO removal under simulated solar light irradiation. Characterizations of physical properties of the ternary composites revealed extended light absorption and high efficient electron-hole separation. Through the optimization of the BiO2-xcontent, we observed that the BOC-BiO2-x(35wt%)-GR composite exhibited superior photocatalytic activities in NO removal as compared to pure BOC, BiO2-x, and BOC-BiO2-xbinary composites. Detailed microstructural observation showed that the BOC-BiO2-xheterojunction was formed between BOC (013) and BiO2-x(111) planes. The density of state (DOS) calculation revealed that due to the different hybridization conditions in the energy bands of BOC and BiO2-x, the Z-scheme charge transfer should be dominant at the heterojunction interface. The density functional theory (DFT) computation on the Fermi level results confirmed that energy band structure between BOC and BiO2-xis more in favor of the transfer of photo-generated electrons from CB of BOC to the VB of BiO2-x, which can be further enhanced by highly conductive GR sheets. The electron spin resonance (ESR) experiments results show that O2−and HO were produced during the photocatalytic process, which further provided evidences that the BOC-BiO2-x(35wt%)-GR composite works as a Z-scheme photocatalyst. This work indicates that Bi-based nanomaterials can be employed as a stable and high efficient solar light active photocatalyst for NO removal in air pollution control.
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关键词/主题词
(BiO)2CO3;BiO2-x;Graphene;NO removal;Z-scheme;
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