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High-performance photocatalytic decomposition of PFOA by BiOX/TiO₂ heterojunctions: Self-induced inner electric fields and band alignment.

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dc.contributor.authorLiu, X.
dc.contributor.authorDuan, X.
dc.contributor.authorBao, T.
dc.contributor.authorHao, D.
dc.contributor.authorChen, Z.
dc.contributor.authorWei, W.
dc.contributor.authorWang, D.
dc.contributor.authorWang, S.
dc.contributor.authorNi, B.-J.
dc.date.issued2022
dc.description.abstractBiOX (X = Cl, Br and I) and BiOX/TiO2 photocatalysts were prepared by a facile hydrothermal approach. The BiOX/TiO2 heterojunctions demonstrated significantly enhanced efficiency for photocatalytic decomposition of perfluorooctanoic acid (PFOA) compared with sole BiOX or TiO2. PFOA (10 mg L–1) was completely degraded by BiOCl(Br)/TiO2 in 8 h. Moreover, BiOCl/TiO2 attained deep decomposition of PFOA with a high defluorination ratio of 82%. The p-n heterojunctions between BiOX and TiO2 were confirmed by a series of characterizations. The photo-induced holes would migrate from the valance band (VB) of TiO2 to BiOX, driven by the built-in electric field (BIEF) near the interfaces of p-n heterojunctions, the inner electric fields (IEF) in BiOX and the higher VB position of BiOX. The X-ray diffraction (XRD) and TEM characterizations indicated that TiO2 combined with BiOX along the [110] facet, which facilitated photo-induced electron transfer in the [001] direction, thus benefiting PFOA decomposition.
dc.description.statementofresponsibilityXiaoqing Liu, Xiaoguang Duan, Teng Bao, Derek Hao, Zhijie Chen, Wei Wei, Dongbo Wang, Shaobin Wang, Bing-Jie Ni
dc.identifier.citationJournal of Hazardous Materials, 2022; 430
dc.identifier.doi10.1016/j.jhazmat.2021.128195
dc.identifier.issn0304-3894
dc.identifier.issn1873-3336
dc.identifier.orcidDuan, X. [0000-0001-9635-5807]
dc.identifier.orcidWang, S. [0000-0002-1751-9162]
dc.identifier.urihttps://hdl.handle.net/2440/135206
dc.language.isoen
dc.publisherElsevier
dc.relation.granthttp://purl.org/au-research/grants/arc/FT160100195
dc.relation.granthttp://purl.org/au-research/grants/arc/DE220100530
dc.rights© 2022 Elsevier B.V. All rights reserved.
dc.source.urihttps://doi.org/10.1016/j.jhazmat.2021.128195
dc.subjectPerfluorooctanoic acid
dc.subjectPhotocatalytic decomposition
dc.subjectDefluorination ratio
dc.subjectInner electric fields
dc.subjectBand alignment
dc.titleHigh-performance photocatalytic decomposition of PFOA by BiOX/TiO₂ heterojunctions: Self-induced inner electric fields and band alignment.
dc.title.alternativeHigh-performance photocatalytic decomposition of PFOA by BiOX/Ti02 heterojunctions: Self-induced inner electric fields and band alignment.
dc.typeJournal article
pubs.publication-statusPublished

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