Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal

doi:10.1016/j.apcatb.2018.04.039

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	Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal
	Zhang, Qian 2,4; Lee, Shun Cheng 1; Ho, Wingkei 5; Shen, Zhenxing 2,3; Cao, Jun-ji 2,4; Zhang, Yufei 2,4; Zhu, Dandan 2; Huang, Yu 2,4
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2018-10-15
卷号	234 期号:4 页码:70-78
关键词	Photocatalysis No Removal P-n Heterojunction Internal Electric Field
DOI	10.1016/j.apcatb.2018.04.039
文献子类	Article
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.
WOS关键词	FACILE SYNTHESIS ; CHARGE-TRANSFER ; 001 FACETS ; MICROSPHERES ; DEGRADATION ; FABRICATION ; NANOSHEETS ; ZNFE2O4 ; SIZE ; AIR
WOS研究方向	Chemistry ; Engineering
语种	英语
WOS记录号	WOS:000433650000008
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/5135]
专题	地球环境研究所_粉尘与环境研究室
作者单位	1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Shaanxi, Peoples R China 3.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Shaanxi, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Shaanxi, Peoples R China 5.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qian,Lee, Shun Cheng,Ho, Wingkei,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.
APA	Zhang, Qian.,Lee, Shun Cheng.,Ho, Wingkei.,Shen, Zhenxing.,Cao, Jun-ji.,...&Huang, Yu.(2018).Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal.APPLIED CATALYSIS B-ENVIRONMENTAL,234(4),70-78.
MLA	Zhang, Qian,et al."Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal".APPLIED CATALYSIS B-ENVIRONMENTAL 234.4(2018):70-78.