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Synthesis of a Bi2O2CO3/ZnFe2O4 heterojunction with enhanced photocatalytic activity for visible light irradiation-induced NO removal
Huang, Yu1,2; Zhu, Dandan1; Zhang, Qian1,2; Zhang, Yufei1,2; Cao, Jun-ji1,2; Shen, Zhenxing1,3; Ho, Wingkei4; Lee, Shun Cheng5
2018-10-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
Volume234Issue:4Pages:70-78
SubtypeArticle
AbstractAlthough 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.
KeywordPhotocatalysis No Removal P-n Heterojunction Internal Electric Field
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apcatb.2018.04.039
WOS KeywordFACILE SYNTHESIS ; CHARGE-TRANSFER ; 001 FACETS ; MICROSPHERES ; DEGRADATION ; FABRICATION ; NANOSHEETS ; ZNFE2O4 ; SIZE ; AIR
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000433650000008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5135
Collection粉尘与环境研究室
Affiliation1.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
GB/T 7714
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.
APA Huang, Yu.,Zhu, Dandan.,Zhang, Qian.,Zhang, Yufei.,Cao, Jun-ji.,...&Lee, Shun Cheng.(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 Huang, Yu,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.
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