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Biocompatible FeOOH-Carbon quantum dots nanocomposites for gaseousNOx removal under visible light: Improved charge separation and Highselectivity
Huang, Y(Huang, Yu)1,2; Gao, YX(Gao, Yuxia)1; Zhang, Q(Zhang, Qian)1,2; Zhang, YF(Zhang, Yufei)1,2; Cao, JJ(Cao, Junji)1,2; Wingkei Ho3; Shun Cheng Lee4; Huang, Yu
2018-04-27
发表期刊Journal of Hazardous Materials
卷号354期号:2018页码:54-62
文章类型期刊论文
摘要Development of biocompatible photocatalysts with improved charge separation and high selectivity is essential for effective removal of air pollutants. Iron-containing catalysts have attracted extensive attention due to their low-toxicity and high natural abundance. Here, carbon quantum dots (CQDs) modified FeOOH nanocomposites fabricated using a facile hydrothermal route showed enhanced NO removal efficiency (22%) compared to pure FeOOH. Moreover, generation of toxic NO2 intermediates was significantly inhibited using the nanocomposites, demonstrating high selectivity for final nitrate formation. Photo-electrochemical results showed that both charge separation and transfer efficiency were significantly improved by CQDs addition, and the lifetime of photo-generated carriers was increased eventually. Density functional theory calculations further elucidated that the suppressed recombination of photo-induced electron-hole pairs was due to enhanced electron migration from the FeOOH to CQDs. A NO degradation mechanism was proposed based on detection of the reactive oxygen species using electron paramagnetic spectroscopy. In addition, the nanocomposite showed good biocompatibility and low cytotoxity, ensuring minimal environmental impact for potential application in large-scale.
关键词Nox Purification Cqds/feooh Photocatalyst Dft Calculation Charge Carrier Separation Degradation Mechanism
DOI10.1016/j.jhazmat.2018.04.071
收录类别SCI
所属项目编号2016BBBMBYFA0203000 ; SKLLQGPY1605 ; 41401567 ; 41573138
语种英语
项目资助者the National Key Research and Development Program of China ; the National Key Research and Development Program of China ; State Key Lab of Loess and Quaternary Geology ; State Key Lab of Loess and Quaternary Geology ; the NationalScience Foundation of China ; the NationalScience Foundation of China
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文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5256
专题粉尘与环境研究室
通讯作者Huang, Yu
作者单位1.Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China
2.State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China
3.Department of Science and Environmental Studies, The Education University of Hong Kong, Hong Kong, China
4.Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China
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GB/T 7714
Huang, Y,Gao, YX,Zhang, Q,et al. Biocompatible FeOOH-Carbon quantum dots nanocomposites for gaseousNOx removal under visible light: Improved charge separation and Highselectivity[J]. Journal of Hazardous Materials,2018,354(2018):54-62.
APA Huang, Y.,Gao, YX.,Zhang, Q.,Zhang, YF.,Cao, JJ.,...&Huang, Yu.(2018).Biocompatible FeOOH-Carbon quantum dots nanocomposites for gaseousNOx removal under visible light: Improved charge separation and Highselectivity.Journal of Hazardous Materials,354(2018),54-62.
MLA Huang, Y,et al."Biocompatible FeOOH-Carbon quantum dots nanocomposites for gaseousNOx removal under visible light: Improved charge separation and Highselectivity".Journal of Hazardous Materials 354.2018(2018):54-62.
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