Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Ratova, M.; Tosheva, L.; Kelly, P. J.; Ohtani, B.

Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts

Ratova, M.; Tosheva, L.; Kelly, P. J. et al.

Sustainable materials and technologies, 2019, 22, e00112

Permalink : https://hdl.handle.net/2115/83380

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論文情報

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アクセス権	open access
URI	https://hdl.handle.net/2115/83380
タイトル	Characterisation and properties of visible light-active bismuth oxide-titania composite photocatalysts
著者	Ratova, M. ; Tosheva, L. ; Kelly, P. J. ; Ohtani, B.
著者名 Ratova, M.
著者名 Tosheva, L.
著者名 Kelly, P. J.
e-Rad_Researcher 80176924 著者名 Ohtani, B.
言語	英語
キーワード	Photocatalysis
	Titanium dioxide
	Bismuth oxide
	Visible light
	Magnetron sputtering
発行日	2019-12
出版者	Elsevier
収録物名	Sustainable materials and technologies
巻(号)	22
ページ	e00112
抄録	Bismuth oxide - titanium dioxide composite materials were produced by pulsed DC reactive magnetron sputtering onto two types of commercially available titanium dioxide nanoparticles. The use of an oscillating bowl enabled deposition of bismuth oxide uniformly onto loose powders, in contrast to solid substrates typically used for the conventional magnetron sputtering processes. Variation of the deposition time allowed the production of composite materials with different amounts of bismuth oxide. The composite materials, as well as uncoated titania powders, were extensively analysed by a range of analytical techniques, including SEM/EDX, XRD, BET, XPS, TEM and UV-visible diffuse reflectance spectroscopy. Photocatalytic properties of the materials were assessed under simulated visible light irradiation via degradation of acetone and methanol through measurements of carbon dioxide evolution. Additionally, the composite materials were characterised with a newly developed technique of reversed double-beam photoacoustic spectroscopy in order to obtain information on the distribution of electron traps. Bismuth oxide was found in crystalline beta-Bi2O3 form on both types of substrates without any additional heat treatment applied. Though the distribution of bismuth oxide on titanium dioxide was found to depend strongly on particle size and deposition time used, the composite materials exhibited significantly enhanced visible light photocatalytic activity compared to either of the commercial titania materials used as a substrate. (C) 2019 Elsevier B.V. All rights reserved.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
権利情報	© 2019, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
PISSN	2214-9937
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1016/j.susmat.2019.e00112