Unraveling  the  mechanisms  of  room-temperature  catalytic degradation  of  indoor  formaldehyde  and  the biocompatibility on colloidal TiO2-supported MnOx–CeO2

doi:10.1039/C8EN00176F

IEECAS OpenIR > 粉尘与环境研究室

	Unraveling the mechanisms of room-temperature catalytic degradation of indoor formaldehyde and the biocompatibility on colloidal TiO2-supported MnOx–CeO2
	Li,HW(Li,Huawei)1; Huang,TT(Huang,Tingting)2; Lu,YF(Lu,Yanfeng)2; Cui,L(Cui,Long)1; Wang,ZY(Wang,Zhenyu)2,3; Zhang,CF(Zhang,Chaofeng)2; Lee,SC(Lee,Shunceng)1; Huang,Y(Huang,Yu)2; Cao,JJ(Cao,Junji)2,3; Ho,WK(Ho,Wingkei)4; (Huang,Yu
	2018
发表期刊	EnvironmentalScienceNano
卷号	5 期号:5 页码:1130-1139
文章类型	期刊论文
其他摘要	This work overcomes the limitations in room-temperature and moisture-dependent activity of transition metal oxide-based catalysts for sub-ppm formaldehyde removal. The active site exposure and self-assembly hydrophilicity were highlighted in MnOx–CeO2 (MCO) nanospheres after the loading of colloidal 2.1 wt% TiO2 particles (TO–MCO). Approximately 57% (relative humidity = 72%) and 41% (dry air) recycling catalytic activities at 35 °C were achieved. Our results proved that surface electron transfer, which was previously weakened because of the loss of surface oxygen species and unsuitable defect-site depositions of low active ions, in the MCO catalyst was recovered via the dispersion of hydrophilic Ti–O groups. This electron transfer was also strongly correlated with the specific surface area, porosity, and oxidation states of transition metals. The greater active site exposure derived from the cyclic electron transfer eventually enhanced the HCHO chemisorption and participation of oxygen species on the surface of TO–MCO throughout the bimetallic (Mn–Ce) dismutation reactions. The abundant superoxide radicals that were activated by these oxygen species prompted a nucleophilic attack on carbonyl bonds. Direct photoionization mass spectrometry determined formic acid, dioxirane (minor), and HOCH2OOH (little) as intermediates governing the HCHO selectivity to CO2. The cytotoxicity of catalysts exposed to yeast cells was evaluated for their potential environmentally friendly application indoors.
DOI	10.1039/C8EN00176F
收录类别	SCI
所属项目编号	2016YFA0203000 ; PolyU152083/14E ; PolyU152090/15E ; C5022–14G ; T24/504/17 ; 2013FY112700 ; 41573138
语种	英语
项目资助者	National KeyResearch and Development Program of China ; National KeyResearch and Development Program of China ; The Research Grants Council of Hong Kong Government ; The Research Grants Council of Hong Kong Government ; Hong Kong RGCCollaborative Research Fund ; Hong Kong RGCCollaborative Research Fund ; The Research GrantsCouncil of Hong Kong Government ; The Research GrantsCouncil of Hong Kong Government ; TheMinistry of Science and Technology of China ; TheMinistry of Science and Technology of China ; National Science Foundation of China ; National Science Foundation of China
引用统计	被引频次：26[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/361006/5369
专题	粉尘与环境研究室
通讯作者	(Huang,Yu
作者单位	1.Department of Civil and Environmental Engineering, The Hong Kong PolytechnicUniversity, Hung Hom, Hong Kong 2.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, ChineseAcademy of Sciences, Xi'an 710061, China 3.School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an710049, China 4.Department of Science and Environmental Studies, The Education University of HongKong, Hong Kong
推荐引用方式 GB/T 7714	Li,HW(Li,Huawei),Huang,TT(Huang,Tingting),Lu,YF(Lu,Yanfeng),等. Unraveling the mechanisms of room-temperature catalytic degradation of indoor formaldehyde and the biocompatibility on colloidal TiO2-supported MnOx–CeO2[J]. EnvironmentalScienceNano,2018,5(5):1130-1139.
APA	Li,HW.,Huang,TT.,Lu,YF.,Cui,L.,Wang,ZY.,...&.(2018).Unraveling the mechanisms of room-temperature catalytic degradation of indoor formaldehyde and the biocompatibility on colloidal TiO2-supported MnOx–CeO2.EnvironmentalScienceNano,5(5),1130-1139.
MLA	Li,HW,et al."Unraveling the mechanisms of room-temperature catalytic degradation of indoor formaldehyde and the biocompatibility on colloidal TiO2-supported MnOx–CeO2".EnvironmentalScienceNano 5.5(2018):1130-1139.

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