A high-performance Bi<inf>2</inf>O<inf>3</inf>/Bi<inf>2</inf>SiO<inf>5</inf> p-n heterojunction photocatalyst induced by phase transition of Bi<inf>2</inf>O<inf>3</inf>

Lu, H; Hao, Q; Chen, T; Zhang, L; Chen, D; Ma, C; Yao, W; Zhu, Y

A high-performance Bi<inf>2</inf>O<inf>3</inf>/Bi<inf>2</inf>SiO<inf>5</inf> p-n heterojunction photocatalyst induced by phase transition of Bi<inf>2</inf>O<inf>3</inf>

Lu, H Hao, Q

Chen, T Zhang, L Chen, D Ma, C Yao, W Zhu, Y

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Publication Type:: Journal Article
Citation:: Applied Catalysis B: Environmental, 2018, 237 pp. 59 - 67
Issue Date:: 2018-12-05

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Field	Value	Language
dc.contributor.author	Lu, H	en_US
dc.contributor.author	Hao, Q https://orcid.org/0000-0001-9981-7499	en_US
dc.contributor.author	Chen, T	en_US
dc.contributor.author	Zhang, L	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	2020-12-05T18:04:34Z
dc.date.issued	2018-12-05	en_US
dc.identifier.citation	Applied Catalysis B: Environmental, 2018, 237 pp. 59 - 67	en_US
dc.identifier.issn	0926-3373	en_US
dc.identifier.uri	http://hdl.handle.net/10453/133076
dc.description.abstract	© 2018 Elsevier B.V. In this work, Bi2O3/Bi2SiO5 p-n heterojunction photocatalyst was successfully fabricated via a facile one-step synthesis using Bi(NO3)3 and nano-SiO2 as precursors. With the increasing amount of SiO2, α-Bi2O3 gradually transferred into β-Bi2O3 and Bi2O3/Bi2SiO5 p-n heterojunction was obtained at the same time. The as-prepared samples were systematically characterized by XRD, scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS). The Bi2O3/Bi2SiO5 heterojunction photocatalysts exhibited higher photocatalytic activity than α-Bi2O3 on the degradation of organic pollutants under simulated sunlight irradiation. The enhanced photocatalytic activity could be ascribed to the larger specific surface area, the larger contact angle, the formation of β-Bi2O3 and construction of p-n heterojunction. More importantly, the phase transition mechanism of Bi2O3 in Bi2O3/Bi2SiO5 heterojunction photocatalyst was proposed, which is significant for the theoretical study and application of photocatalytic materials.	en_US
dc.relation.ispartof	Applied Catalysis B: Environmental	en_US
dc.relation.isbasedon	10.1016/j.apcatb.2018.05.069	en_US
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Physical Chemistry	en_US
dc.title	A high-performance Bi<inf>2</inf>O<inf>3</inf>/Bi<inf>2</inf>SiO<inf>5</inf> p-n heterojunction photocatalyst induced by phase transition of Bi<inf>2</inf>O<inf>3</inf>	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, Bi2O3/Bi2SiO5 p-n heterojunction photocatalyst was successfully fabricated via a facile one-step synthesis using Bi(NO3)3 and nano-SiO2 as precursors. With the increasing amount of SiO2, α-Bi2O3 gradually transferred into β-Bi2O3 and Bi2O3/Bi2SiO5 p-n heterojunction was obtained at the same time. The as-prepared samples were systematically characterized by XRD, scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–vis diffuse reflectance spectroscopy (DRS). The Bi2O3/Bi2SiO5 heterojunction photocatalysts exhibited higher photocatalytic activity than α-Bi2O3 on the degradation of organic pollutants under simulated sunlight irradiation. The enhanced photocatalytic activity could be ascribed to the larger specific surface area, the larger contact angle, the formation of β-Bi2O3 and construction of p-n heterojunction. More importantly, the phase transition mechanism of Bi2O3 in Bi2O3/Bi2SiO5 heterojunction photocatalyst was proposed, which is significant for the theoretical study and application of photocatalytic materials.

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http://hdl.handle.net/10453/133076