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Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure

Wang, Mingyue; Quesada-Cabrera, Raul; Sathasivam, Sanjayan; Blunt, Matthew O; Borowiec, Joanna; Carmalt, Claire J; (2023) Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure. ACS Applied Materials & Interfaces 10.1021/acsami.3c11525. Green open access

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Abstract

The search for efficient materials for sustainable infrastructure is an urgent challenge toward potential negative emission technologies and the global environmental crisis. Pleasant, efficient sunlight-activated coatings for applications in self-cleaning windows are sought in the glass industry, particularly those produced from scalable technologies. The current work presents visible-light-active iodide-doped BiOBr thin films fabricated using aerosol-assisted chemical vapor deposition. The impact of dopant concentration on the structural, morphological, and optical properties was studied systematically. The photocatalytic properties of the parent materials and as-deposited doped films were evaluated using the smart ink test. An optimized material was identified as containing 2.7 atom % iodide dopant. Insight into the photocatalytic behavior of these coatings was gathered from photoluminescence and photoelectrochemical studies. The optimum photocatalytic performance could be explained from a balance between photon absorption, charge generation, carrier separation, and charge transport properties under 450 nm irradiation. This optimized iodide-doped BiOBr coating is an excellent candidate for the photodegradation of volatile organic pollutants, with potential applications in self-cleaning windows and other surfaces.

Type: Article
Title: Visible-Light-Active Iodide-Doped BiOBr Coatings for Sustainable Infrastructure
Location: United States
Open access status: An open access version is available from UCL Discovery
DOI: 10.1021/acsami.3c11525
Publisher version: https://doi.org/10.1021/acsami.3c11525
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
Keywords: Aerosol-assisted chemical vapor deposition (AACVD), iodide-doped BiOBr thin films, resazurin ink, self-cleaning windows, visible-light photocatalysis
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10179082
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