Titanium oxide improves boron nitride photocatalytic degradation of perfluorooctanoic acid

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dc.citation.articleNumber137735
dc.citation.journalTitleChemical Engineering Journal
dc.citation.volumeNumber448
dc.contributor.authorDuan, Lijie
dc.contributor.authorWang, Bo
dc.contributor.authorHeck, Kimberly N.
dc.contributor.authorClark, Chelsea A.
dc.contributor.authorWei, Jinshan
dc.contributor.authorWang, Minghao
dc.contributor.authorMetz, Jordin
dc.contributor.authorWu, Gang
dc.contributor.authorTsai, Ah-Lim
dc.contributor.authorGuo, Sujin
dc.contributor.authorArredondo, Jacob
dc.contributor.authorMohite, Aditya D.
dc.contributor.authorSenftle, Thomas P.
dc.contributor.authorWesterhoff, Paul
dc.contributor.authorAlvarez, Pedro
dc.contributor.authorWen, Xianghua
dc.contributor.authorSong, Yonghui
dc.contributor.authorWong, Michael S.
dc.contributor.orgCenter for Nanotechnology Enabled Water Treatment
dc.date.accessioned2022-08-08T15:08:41Z
dc.date.available2022-08-08T15:08:41Z
dc.date.issued2022
dc.description.abstractBoron nitride (BN) has the newly-found property of degrading recalcitrant polyfluoroalkyl substances (PFAS) under ultraviolet C (UV-C, 254 nm) irradiation. It is ineffective at longer wavelengths, though. In this study, we report the simple calcination of BN and UV-A active titanium oxide (TiO2) creates a BN/TiO2 composite that is more photocatalytically active than BN or TiO2 under UV-A for perfluorooctanoic acid (PFOA). Under UV-A, BN/TiO2 degraded PFOA ∼ 15 × faster than TiO2, while BN was inactive. Band diagram analysis and photocurrent response measurements indicated that BN/TiO2 is a type-II heterojunction semiconductor, facilitating charge carrier separation. Additional experiments confirmed the importance of photogenerated holes for degrading PFOA. Outdoor experimentation under natural sunlight found BN/TiO2 to degrade PFOA in deionized water and salt-containing water with a half-life of 1.7 h and 4.5 h, respectively. These identified photocatalytic properties of BN/TiO2 highlight the potential for the light-driven destruction of other PFAS.
dc.identifier.citationDuan, Lijie, Wang, Bo, Heck, Kimberly N., et al.. "Titanium oxide improves boron nitride photocatalytic degradation of perfluorooctanoic acid." <i>Chemical Engineering Journal,</i> 448, (2022) Elsevier: https://doi.org/10.1016/j.cej.2022.137735.
dc.identifier.doihttps://doi.org/10.1016/j.cej.2022.137735
dc.identifier.urihttps://hdl.handle.net/1911/113051
dc.language.isoeng
dc.publisherElsevier
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Elsevier.
dc.titleTitanium oxide improves boron nitride photocatalytic degradation of perfluorooctanoic acid
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
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