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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
Source PublicationEnvironmentalScienceNano
Volume5Issue:5Pages:1130-1139
Subtype期刊论文
Other AbstractThis 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.
DOI10.1039/C8EN00176F
Indexed BySCI
Project Number2016YFA0203000 ; PolyU152083/14E ; PolyU152090/15E ; C5022–14G ; T24/504/17 ; 2013FY112700 ; 41573138
Language英语
Funding OrganizationNational 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
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Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5369
Collection粉尘与环境研究室
Corresponding Author(Huang,Yu
Affiliation1.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
Recommended Citation
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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