Photoinduced Production of Chlorine Molecules from Titanium Dioxide Surfaces Containing Chloride

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dc.contributor University of Helsinki, Department of Physics en
dc.contributor University of Helsinki, INAR Physics en
dc.contributor University of Helsinki, INAR Physics en
dc.contributor.author Li, Yuanyuan
dc.contributor.author Nie, Wei
dc.contributor.author Liu, Yuliang
dc.contributor.author Huang, Dandan
dc.contributor.author Xu, Zheng
dc.contributor.author Peng, Xiang
dc.contributor.author George, Christian
dc.contributor.author Yan, Chao
dc.contributor.author Tham, Yee Jun
dc.contributor.author Yu, Chuan
dc.contributor.author Xia, Men
dc.contributor.author Fu, Xiao
dc.contributor.author Wang, Xinfeng
dc.contributor.author Xue, Likun
dc.contributor.author Wang, Zhe
dc.contributor.author Xu, Zhengning
dc.contributor.author Chi, Xuguang
dc.contributor.author Wang, Tao
dc.contributor.author Ding, Aijun
dc.date.accessioned 2021-01-12T22:58:37Z
dc.date.available 2021-12-01T03:45:09Z
dc.date.issued 2020-02
dc.identifier.citation Li , Y , Nie , W , Liu , Y , Huang , D , Xu , Z , Peng , X , George , C , Yan , C , Tham , Y J , Yu , C , Xia , M , Fu , X , Wang , X , Xue , L , Wang , Z , Xu , Z , Chi , X , Wang , T & Ding , A 2020 , ' Photoinduced Production of Chlorine Molecules from Titanium Dioxide Surfaces Containing Chloride ' , Environmental Science & Technology Letters , vol. 7 , no. 2 , pp. 70-75 . https://doi.org/10.1021/acs.estlett.9b00704 en
dc.identifier.issn 2328-8930
dc.identifier.other PURE: 135014642
dc.identifier.other PURE UUID: 3e2b9eac-372b-406a-96dd-73152630d685
dc.identifier.other WOS: 000513299500003
dc.identifier.uri http://hdl.handle.net/10138/324441
dc.description.abstract Titanium dioxide (TiO2) is extensively used with the process of urbanization and potentially influences atmospheric chemistry, which is yet unclear. In this work, we demonstrated strong production of Cl-2 from illuminated KCl-coated TiO2 membranes and suggested an important daytime source of chlorine radicals. We found that water and oxygen were required for the reactions to proceed, and Cl-2 production increased linearly with the amount of coated KCl, humidity of the carrier gas, and light intensity. These results suggested that water promotes the reactivity of coated KCl via interaction with the crystal lattice to release free chloride ions (Cl-). The free Cl- transfer charges to O-2 via photoactivated TiO2 to form Cl-2 and probably the O-2(-) radical. In addition to Cl-2, ClO and HOCl were also observed via the complex reactions between Cl/Cl-2 and HOx. An intensive campaign was conducted in Shanghai, during which evident daytime peaks of Cl-2 were observed. Estimated Cl-2 production from TiO2 photocatalysis can be up to 0.2 ppb/h when the TiO2-containing surface reaches 20% of the urban surface, and highly correlated to the observed Cl-2. Our results suggest a non-negligible role of TiO2 in atmospheric photochemistry via altering the radical budget. en
dc.format.extent 6
dc.language.iso eng
dc.relation.ispartof Environmental Science & Technology Letters
dc.rights en
dc.subject NITRYL CHLORIDE en
dc.subject NITROUS-ACID en
dc.subject CHEMISTRY en
dc.subject OZONE en
dc.subject TIO2 en
dc.subject PHOTOCATALYSIS en
dc.subject SITE en
dc.subject O-2 en
dc.subject 114 Physical sciences en
dc.title Photoinduced Production of Chlorine Molecules from Titanium Dioxide Surfaces Containing Chloride en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.1021/acs.estlett.9b00704
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/acceptedVersion
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