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题名: Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal
作者: Huang, Yu1, 2;  Zhu, Dandan1;  Zhang, Qian1, 2;  Zhang, Yufei1, 2;  Cao, Jun-ji1, 2;  Shen, Zhenxing1, 3;  Ho, Wingkei4;  Lee, Shun Cheng5
关键词: Photocatalysis ;  NO removal ;  p-n heterojunction ;  Internal electric field
刊名: APPLIED CATALYSIS B-ENVIRONMENTAL
发表日期: 2018-10-15
DOI: 10.1016/j.apcatb.2018.04.039
卷: 234, 期:4, 页:70-78
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Engineering, Environmental ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Although bismuth subcarbonate (Bi2O2CO3), a member of the Aurivillius-phase oxide family, is a promising photocatalyst for the removal of gaseous NO at parts-per-billion level, the large band gap of this material restricts its applications to the UV light region. The above problem can be mitigated by heterojunction fabrication, which not only broadens the light absorbance range, but also inhibits the recombination of photogenerated charge carriers. Herein, we implement this strategy to fabricate a novel Bi2O2CO3/ZnFe2O4 photocatalyst for NO removal under visible light irradiation and authenticate the formation of the above p-n heterojunction using an array of analytical techniques. Notably, the above composite showed activity superior to those of its individual constituents, and the underlying mechanisms of this activity enhancement were probed by density functional theory calculations and photocurrent measurements. Elevated electron/hole separation efficiency caused by the presence of an internal electric field at the Bi2O2CO3/ZnFe2O4 interface was identified as the main reason of the increased photocatalytic activity, with the main active species were determined as center dot O-2(-) and center dot OH by electron spin resonance spectroscopy. Finally, cytotoxicity testing proved the good biocompatibility of Bi2O2CO3/ZnFe2O4. Thus, this work presents deep insights into the preparation and use of a green p-n heterojunction catalyst in various applications.
关键词[WOS]: FACILE SYNTHESIS ;  CHARGE-TRANSFER ;  001 FACETS ;  MICROSPHERES ;  DEGRADATION ;  FABRICATION ;  NANOSHEETS ;  ZNFE2O4 ;  SIZE ;  AIR
语种: 英语
WOS记录号: WOS:000433650000008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.ieecas.cn/handle/361006/5135
Appears in Collections:粉尘与环境研究室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China
3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China
4.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China

Recommended Citation:
Huang, Yu,Zhu, Dandan,Zhang, Qian,et al. Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2018,234(4):70-78.
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