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Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal
Wang, Zhenyu1,2,3; Huang, Yu1,2; Chen, Meijuan3; Shi, Xianjin1,2; Zhang, Yufei1,2; Cao, Junji1,2,3; Ho, Wingkei4; Lee, Shun Cheng5
Corresponding AuthorHuang, Yu(huangyu@ieecas.cn)
2019-03-20
Source PublicationACS APPLIED MATERIALS & INTERFACES
ISSN1944-8244
Volume11Issue:11Pages:10651-10662
AbstractThe development of catalysts that effectively activate target pollutants and promote their complete conversion is an admirable objective in the environmental photocatalysis field. In this work, graphitic carbon nitride (g-C3N4) microtubes with tunable N-vacancy concentrations were controllably fabricated using an in situ soft-chemical method. The morphological evolution of C3N4 from the bulk to the porous tubular architecture, is discussed in detail with the aid of time-resolved hydrothermal experiments. We found that the NO removal ratio and apparent reaction rate constant of the g-C3N4 microtubes were 1.8 and 2.6 times higher than those of pristine g-C3N4, respectively. By combining detailed experimental characterization and density functional theory calculations, the effects of N-vacancies in the g-C3N4 microtubes on O-2 and NO adsorption activation, electron capture, and electronic structure were systematically investigated. These results demonstrate that surface N-vacancies act as specific sites for the adsorption activation of reactants and photoinduced electron capture, while enhancing the light-absorbing capability of g-C3N4. Moreover, the porous wall structures of the as-prepared g-C3N4 microtubes facilitate the diffusion of reactants, and their tubular architectures favor the oriented transfer of charge carriers. The intermediates formed during photocatalytic NO removal processes were identified by in situ diffuse reflectance infrared Fourier transform spectroscopy, and different reaction pathways over pristine and N-deficient g-C3N4 are proposed. This study provides a feasible strategy for air pollution control over g-C3N4 by introducing N-vacancy and porous tubular architecture simultaneously.
KeywordN-vacancy tubular g-C3N4 porosity photocatalytic NOx removal
DOI10.1021/acsami.8b21987
WOS KeywordGRAPHITIC CARBON NITRIDE ; INTERFACIAL CHARGE-TRANSFER ; SELF-SACRIFICIAL SYNTHESIS ; NANOSHEETS ; HETEROJUNCTIONS ; SEPARATION ; COMPOSITE ; OXIDE ; WATER ; TIO2
Indexed BySCI ; SCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFA0203000] ; National Key Research and Development Program of China[2017YFC0212200] ; National Science Foundation of China[41573138] ; National Science Foundation of China[51878644] ; Key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-04] ; Hundred Talent Program of the Chinese Academy of Sciences
WOS Research AreaScience & Technology - Other Topics ; Materials Science
Funding OrganizationNational Key Research and Development Program of China ; National Science Foundation of China ; Key Research and Development Program of Shaanxi Province ; Hundred Talent Program of the Chinese Academy of Sciences
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS IDWOS:000462260000023
PublisherAMER CHEMICAL SOC
Citation statistics
Cited Times:109[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/14210
Collection粉尘与环境研究室
第四纪科学与全球变化卓越创新中心
Corresponding AuthorHuang, Yu
Affiliation1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian 710061, Shaanxi, Peoples R China
2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China
3.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Shaanxi, Peoples R China
4.Educ Univ Hong Kong, Dept Sci & Environm Studies, Hong Kong, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China
Recommended Citation
GB/T 7714
Wang, Zhenyu,Huang, Yu,Chen, Meijuan,et al. Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal[J]. ACS APPLIED MATERIALS & INTERFACES,2019,11(11):10651-10662.
APA Wang, Zhenyu.,Huang, Yu.,Chen, Meijuan.,Shi, Xianjin.,Zhang, Yufei.,...&Lee, Shun Cheng.(2019).Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal.ACS APPLIED MATERIALS & INTERFACES,11(11),10651-10662.
MLA Wang, Zhenyu,et al."Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal".ACS APPLIED MATERIALS & INTERFACES 11.11(2019):10651-10662.
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