首页|Development and application of photocatalytic coating for roadside NOx mitigation in Hong Kong
Development and application of photocatalytic coating for roadside NOx mitigation in Hong Kong
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A facile chemical method for the development of photocatalytic coating products was proposed based on practical application perspective for the Hong Kong roadside nitrogen oxides(NOx)mitigation.TiO2-based photocatalytic coating PC-C film with crystallized size of around 5-6 nm was synthesized with the peptization of H2O2.The PC-C coating possesses a super-hydrophilicity surface and is proven to have a NOx degradation rate of 46.8％with an optimum pH level of 7.In addition,the PC-C coating presents a promising photocatalytic NOx degradation compared with other commercially available coating products and P25 when applied on two building materials of poly-methyl methacrylate(PMMA)and concrete sur-face.A weather resistance simulation and a 180-day on-site field trial were carried out the attenuation effects of photocatalytic coating applied in outdoor exposure.Based on epidemiological estimation and field investigation,hospital admissions for respiratory diseases(HARD)and mortality cases(MC)could be reduced with the application of PC-C coating along the street canyon.This work demonstrates the feasibility of air pollution control measures for the local roadside NOx using photocatalytic technology,offering promising health benefits with environmental remediation.
Xinwei Li、Pengge Wang、Shuwen Han、Yu Huang、Wingkei Ho、Steven Sai Hang Ho、Shun-cheng Lee、Meng Wang
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Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong,China
State Key Laboratory of Loess and Quaternary Geology(SKLLQG)and Key Laboratory of Aerosol Chemistry and Physics,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China
Department of Science and Environmental Studies,The Education University of Hong Kong,Hong Kong,China
Division of Atmospheric Sciences,Desert Research Institute,Reno,NV 89512,United States
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collaborative research project from Ove Arup & Partners Hong Kong LimitedThemebased Research Schemes of Research Grants Council,Hong KongThemebased Research Schemes of Research Grants Council,Hong KongGeneral Research Fund,Research Grants Council of Hong Kong GovernmentDean's Research FundFLASS,EdUHKHighway Department of Hong Kong,SAR
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