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Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study
Wang, Zhenyu1,2; Huang, Yu2,3; Ho, Wingkei4; Cao, Junji1,2,3; Shen, Zhenxing5; Lee, Shun Cheng6
2016-12-15
Source PublicationAPPLIED CATALYSIS B-ENVIRONMENTAL
Volume199Issue:2016Pages:123-133
SubtypeArticle
AbstractLayer-structured Bi2O2CO3/g-C3N4 heterojunction photocatalysts were successfully prepared via one pot hydrothermal method for the first time, in which graphitic carbon nitride (g-C3N4) served as the self-sacrificial reagent to supply carbonate anions simultaneously. Our results showed that the in situ fabricatedi(2)O(2)CO(3)/g-C3N4 heterojunction exhibited superior visible-light-driven photocatalytic activity for NO photocatalytic oxidation, which can be ascribed to the morphology and structure modulation during the sacrificial synthesis processes. Heterojunctions formation pathways underlying temperature and time-dependent structure evolution were discussed in detail. The sample fabricated at 160 degrees C for 12h (BOC-CN-160) showed high stability and durability, and the highest NO removal rate which is up to 34.8% under visible light irradiation. Results from photocurrent tests and electrochemical impedance spectroscopy (EIS) demonstrated that the BOC-CN-160 sample presents much more effective interface charge separation efficiency, which can contribute to its remarkably improved photocatalytic performance. Reactive "radicals during the photocatalysis processes were identified by electron spin resonance (ESR) study. Combined with the quantification of reaction intermediates, the photocatalytic degradation mechanism of NO over Bi2O2CO3/g-C3N4 heterojunction photocatalystwas proposed. The novel approach developed in this study may be further extended to synthesize a series of novel and highly efficient g-C3N4-based carbonate heterojunction photocatalysts for visible light-harvesting and energy conversion applications. (C) 2016 Elsevier B.V. All rights reserved.
KeywordHeterojunction Photocatalysis Bi2o2co3/g-c3n4 Self-sacrificial Synthesis No Removal
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1016/j.apcatb.2016.06.027
WOS KeywordGRAPHITIC CARBON NITRIDE ; CONTAINING WASTE-WATER ; VISIBLE-LIGHT ; HIGHLY EFFICIENT ; CONTROLLABLE SYNTHESIS ; SOLAR PHOTOCATALYSIS ; HOLLOW MICROSPHERES ; GROWTH-MECHANISM ; FACILE SYNTHESIS ; INDOOR AIR
Indexed BySCI
Language英语
WOS Research AreaChemistry ; Engineering
WOS SubjectChemistry, Physical ; Engineering, Environmental ; Engineering, Chemical
WOS IDWOS:000382343500012
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5675
Collection粉尘与环境研究室
Affiliation1.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710061, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, SKLLQG, Xian 710061, Peoples R China
4.Hong Kong Inst Educ, Dept Sci & Environm Studies, Hong Kong, Hong Kong, Peoples R China
5.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
6.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhenyu,Huang, Yu,Ho, Wingkei,et al. Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2016,199(2016):123-133.
APA Wang, Zhenyu,Huang, Yu,Ho, Wingkei,Cao, Junji,Shen, Zhenxing,&Lee, Shun Cheng.(2016).Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study.APPLIED CATALYSIS B-ENVIRONMENTAL,199(2016),123-133.
MLA Wang, Zhenyu,et al."Fabrication of Bi2O2CO3/g-C3N4 heterojunctions for efficiently photocatalytic NO in air removal: In-situ self-sacrificial synthesis, characterizations and mechanistic study".APPLIED CATALYSIS B-ENVIRONMENTAL 199.2016(2016):123-133.
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