A honeycomb multilevel structure Bi<inf>2</inf>O<inf>3</inf> with highly efficient catalytic activity driven by bias voltage and oxygen defect

Chen, T; Hao, Q; Yang, W; Xie, C; Chen, D; Ma, C; Yao, W; Zhu, Y

A honeycomb multilevel structure Bi<inf>2</inf>O<inf>3</inf> with highly efficient catalytic activity driven by bias voltage and oxygen defect

Chen, T Hao, Q

Yang, W Xie, C Chen, D Ma, C Yao, W Zhu, Y

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Publication Type:: Journal Article
Citation:: Applied Catalysis B: Environmental, 2018, 237 pp. 442 - 448
Issue Date:: 2018-12-05

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Field	Value	Language
dc.contributor.author	Chen, T	en_US
dc.contributor.author	Hao, Q https://orcid.org/0000-0001-9981-7499	en_US
dc.contributor.author	Yang, W	en_US
dc.contributor.author	Xie, C	en_US
dc.contributor.author	Chen, D	en_US
dc.contributor.author	Ma, C	en_US
dc.contributor.author	Yao, W	en_US
dc.contributor.author	Zhu, Y https://orcid.org/0000-0001-8528-509X	en_US
dc.date.available	2020-12-05T18:04:21Z
dc.date.issued	2018-12-05	en_US
dc.identifier.citation	Applied Catalysis B: Environmental, 2018, 237 pp. 442 - 448	en_US
dc.identifier.issn	0926-3373	en_US
dc.identifier.uri	http://hdl.handle.net/10453/133077
dc.description.abstract	© 2018 Elsevier B.V. In this work, we report a bismuth oxide film electrode with oxygen defects and honeycomb multilevel structure prepared by one-step hydrothermal method. The control of raw materials enables to control the thickness and morphology of BiO electrodes. The photoelectrocatalytic of prepared electrodes were tested in various conditions. Under visible light irradiation (λ ≥ 420 nm) and 3 V bias, the sample BiO-2 has the highest photoelectrocatalytic activity, which is 4.95 times higher than the photocatalytic activity and 9.86 times higher than the electrocatalytic activity. The oxygen defects of bismuth oxide were confirmed by EPR and DFT calculation. The morphology and structure of prepared samples were tested by XRD, scanning electronic microscope (SEM), high-resolution transmission electron microscope (HRTEM) and X-ray photoelectron spectroscopy (XPS). The enhanced photoelectrocatalytic activity is attributed to the proper bias voltage, oxygen defects, and honeycomb multilevel structure. The results of tapping experiments showed that the main active species during the photoelectrocatalytic progress is superoxide radical and the mechanism of the photoelectrocatalysis was proposed.	en_US
dc.relation.ispartof	Applied Catalysis B: Environmental	en_US
dc.relation.isbasedon	10.1016/j.apcatb.2018.05.044	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Physical Chemistry	en_US
dc.title	A honeycomb multilevel structure Bi<inf>2</inf>O<inf>3</inf> with highly efficient catalytic activity driven by bias voltage and oxygen defect	en_US
dc.type	Journal Article
utslib.citation.volume	237	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0907 Environmental Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	open_access	*
pubs.publication-status	Published	en_US
pubs.volume	237	en_US

Abstract:

© 2018 Elsevier B.V. In this work, we report a bismuth oxide film electrode with oxygen defects and honeycomb multilevel structure prepared by one-step hydrothermal method. The control of raw materials enables to control the thickness and morphology of BiO electrodes. The photoelectrocatalytic of prepared electrodes were tested in various conditions. Under visible light irradiation (λ ≥ 420 nm) and 3 V bias, the sample BiO-2 has the highest photoelectrocatalytic activity, which is 4.95 times higher than the photocatalytic activity and 9.86 times higher than the electrocatalytic activity. The oxygen defects of bismuth oxide were confirmed by EPR and DFT calculation. The morphology and structure of prepared samples were tested by XRD, scanning electronic microscope (SEM), high-resolution transmission electron microscope (HRTEM) and X-ray photoelectron spectroscopy (XPS). The enhanced photoelectrocatalytic activity is attributed to the proper bias voltage, oxygen defects, and honeycomb multilevel structure. The results of tapping experiments showed that the main active species during the photoelectrocatalytic progress is superoxide radical and the mechanism of the photoelectrocatalysis was proposed.

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http://hdl.handle.net/10453/133077