Coral-Shaped TiO2-delta Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal

doi:10.1021/acsanm.1c01306

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	Coral-Shaped TiO2-delta Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal
	Ou, Yucheng 1; Zhu, Gangqiang 1; Rao, Fei 1; Gao, Jianzhi 1; Chang, Jun 1; Xie, Xiaotao 1; Zhang, Weibin 1; Huang, Yu 2; Hojamberdiev, Mirabbos 1
通讯作者	Zhu, Gangqiang(zgq2006@snnu.edu.cn) ; Zhang, Weibin(wbzhang@yangtzeu.edu.cn)
	2021-07-23
发表期刊	ACS APPLIED NANO MATERIALS
ISSN	2574-0970
卷号	4 期号:7 页码:7330-7342
摘要	Coral-like TiO2-delta] microstructures with high surface area were synthesized by a simple hydrothermal method, followed by thermal treatment in a N-2 atmosphere. The introduction of oxygen vacancies (OVs) to TiO2 significantly improved light absorption and inhibited the recombination of photogenerated charge carriers. Then, multiwalled carbon nanotubes (CNTs) and N-doped carbon quantum dots (N-CQDs) were decorated on the surface of coral-like TiO2-delta microstructures. The CNTs could greatly improve the separation and transfer efficiency of photogenerated charge carriers, while the N-CQDs could further extend light absorption to longer wavelengths, including the IR region. According to the results of electron spin resonance (ESR) spectroscopy, the introduction of OVs to TiO2-delta and surface modification with CNTs and N-CQDs promoted the generation of O-center dot(2)- and (OH)-O-center dot active species. The formation of O-center dot(2)- and (OH)-O-center dot active species on the surface of TiO2-delta/CNTs/N-CQDs played an important role in the deep oxidation and selective conversion of NO into nitrate. Density functional theory calculations revealed the adsorption and reaction sites for H2O and O-2 separately in space over the surface of TiO2-delta CNTs/N-CQDs. Namely, the reaction sites of H2O and O-2 are on the surface of TiO2- delta and CNTs, respectively. The electron transfer from TiO2-delta to CNTs was further verified through the differential charge density. This study demonstrates a straightforward approach for designing full-spectrum-responsive photocatalysts with high efficiency, stability, and selectivity for NO removal.
关键词	TiO2 oxygen vacancy carbon nanotubes carbon quantum dots photocatalysis full spectrum response NO removal
DOI	10.1021/acsanm.1c01306
关键词[WOS]	PHOTOCATALYTIC PERFORMANCE ; CHARGE-TRANSFER ; MECHANISM ; TIO2 ; ADSORPTION ; OXIDATION ; NANOCOMPOSITE ; MICROSPHERES ; DEGRADATION ; DRIVEN
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[51772183] ; National Natural Science Foundation of China[52072230] ; Key Research and Development Program of Shaanxi Province[2018ZDCXL-SF-02-04] ; Fundamental Research Funds for the Central Universities[2020TS028]
WOS研究方向	Science & Technology - Other Topics ; Materials Science
项目资助者	National Natural Science Foundation of China ; Key Research and Development Program of Shaanxi Province ; Fundamental Research Funds for the Central Universities
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000677582900084
出版者	AMER CHEMICAL SOC
引用统计	被引频次：17[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/361006/16892
专题	粉尘与环境研究室
通讯作者	Zhu, Gangqiang; Zhang, Weibin
作者单位	1.Shaanxi Normal Univ, Sch Phys & Informat Technol, Xian 710062, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China
推荐引用方式 GB/T 7714	Ou, Yucheng,Zhu, Gangqiang,Rao, Fei,et al. Coral-Shaped TiO2-delta Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal[J]. ACS APPLIED NANO MATERIALS,2021,4(7):7330-7342.
APA	Ou, Yucheng.,Zhu, Gangqiang.,Rao, Fei.,Gao, Jianzhi.,Chang, Jun.,...&Hojamberdiev, Mirabbos.(2021).Coral-Shaped TiO2-delta Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal.ACS APPLIED NANO MATERIALS,4(7),7330-7342.
MLA	Ou, Yucheng,et al."Coral-Shaped TiO2-delta Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal".ACS APPLIED NANO MATERIALS 4.7(2021):7330-7342.