Visible-light-driven BiOBr nanosheets for highly facet-dependent photocatalytic inactivation of Escherichia coli

Bismuth oxybromide (BiOBr) nanosheets with fully exposed {001} and {010} facets are synthesized via a facile hydrothermal method. Significant differences in photocatalytic inactivation towards Escherichia coli K-12 under visible light irradiation are found to be highly dependent on the dominantly ex...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2015-01, Vol.3 (29), p.15148-15155
Hauptverfasser: Wu, Dan, Wang, Bo, Wang, Wei, An, Taicheng, Li, Guiying, Ng, Tsz Wai, Yip, Ho Yin, Xiong, Chunmei, Lee, Hung Kay, Wong, Po Keung
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Bismuth oxybromide (BiOBr) nanosheets with fully exposed {001} and {010} facets are synthesized via a facile hydrothermal method. Significant differences in photocatalytic inactivation towards Escherichia coli K-12 under visible light irradiation are found to be highly dependent on the dominantly exposed facets. In comparison with BiOBr with dominant {010}-facet (B010) nanosheets, BiOBr with dominant {001}-facet (B001) nanosheets exhibit remarkably higher photocatalytic activity in bacterial inactivation. This superior activity is ascribed to the more favorable separation and transfer of photogenerated electron-hole pairs as well as more oxygen vacancies of B001 nanosheets. Due to the faster production and further accumulation of &z.rad; O sub(2) super(-) and h super(+) within a short time, the VLD photocatalyst of B001 nanosheets can completely inactivate 10 super(7) colony forming unit (CFU) mL super(-1) (i.e. 7-log reduction) bacterial cells within 2 h; while only 1- and 6.5-log reductions of bacterial cells can be achieved within 2 and 6 h, respectively, by B010 nanosheets due to limited amounts of h super(+) and &z.rad; O sub(2) super(-) generated.
ISSN:2050-7488
2050-7496
DOI:10.1039/c5ta02757h