Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal

doi:10.1021/acsami.8b21987

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	Roles of N-Vacancies over Porous g-C3N4 Microtubes during Photocatalytic NOx Removal
	Wang, Zhenyu 1,2,3; Huang, Yu 1,2; Chen, Meijuan 3; Shi, Xianjin 1,2; Zhang, Yufei 1,2; Cao, Junji 1,2,3; Ho, Wingkei 4; Lee, Shun Cheng 5
通讯作者	Huang, Yu(huangyu@ieecas.cn)
	2019-03-20
发表期刊	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
卷号	11 期号:11 页码:10651-10662
摘要	The 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.
关键词	N-vacancy tubular g-C3N4 porosity photocatalytic NOx removal
DOI	10.1021/acsami.8b21987
关键词[WOS]	GRAPHITIC CARBON NITRIDE ; INTERFACIAL CHARGE-TRANSFER ; SELF-SACRIFICIAL SYNTHESIS ; NANOSHEETS ; HETEROJUNCTIONS ; SEPARATION ; COMPOSITE ; OXIDE ; WATER ; TIO2
收录类别	SCI ; SCI
语种	英语
资助项目	National 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研究方向	Science & Technology - Other Topics ; Materials Science
项目资助者	National 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类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000462260000023
出版者	AMER CHEMICAL SOC
引用统计	被引频次：202[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14210
专题	粉尘与环境研究室第四纪科学与全球变化卓越创新中心
通讯作者	Huang, Yu
作者单位	1.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
推荐引用方式 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.