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Hydrothermal synthesis and photocatalytic activities of stabilized bismuth vanadate/bismuth tungstate composites

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Title: Hydrothermal synthesis and photocatalytic activities of stabilized bismuth vanadate/bismuth tungstate composites
Authors: Ketwong, Pradudnet Browse this author
Takashima, Mai Browse this author
Nitta, Akio Browse this author
Pookmanee, Pusit Browse this author
Ohtani, Bunsho Browse this author →KAKEN DB
Keywords: Bismuth vanadate/bismuth tungstate
Photocatalyst
Stabilization
Photoacoustic spectroscopy
Issue Date: Apr-2018
Publisher: Elsevier
Journal Title: Journal of environmental chemical engineering
Volume: 6
Issue: 2
Start Page: 2048
End Page: 2054
Publisher DOI: 10.1016/j.jece.2018.01.062
Abstract: Bismuth vanadate/bismuth tungstate (BVO/BWO) composites in various BVO fractions (f(V)) were synthesized through hydrothermal reaction. Morphology analysis of the composites showed that rod-like BVO structures were partially deposited on flake-ball (FB) BWO particles. In addition, surface structures of BWO, BVO and BVO/BWO were studied in energy-resolved distribution of electron traps and conduction band-bottom (CBB) position by household reversed double-beam photoacoustic spectroscopy (PAS) and single-beam PAS, respectively. Apparent CBB of BVO/BWO was ca. 0.4 eV anodically shifted from BWO and almost similar to BVO. Moreover, photocatalytic oxygen liberation under irradiation of UV-vis and visible lights demonstrated that photocatalytic activities of the BVO/BWO composites were depended on f(V) and calcined BVO/BWO composites in which BVO was stabilized on BWO showed enhancement of photocatalytic activity comparing to a pristine BVO. The prolonged and the highest active photocatalyst under visible light was calcined 0.80 f(V) due to BVO stabilization on FB-BWO particles.
Rights: © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
http://creativecommons.org/licenses/by-nc-nd/4.0/
Type: article (author version)
URI: http://hdl.handle.net/2115/77191
Appears in Collections:触媒科学研究所 (Institute for Catalysis) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高島 舞

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