Visible-light-driven BiOBr nanosheets for highly facet-dependent photocatalytic inactivation of Escherichia coli
Publication in refereed journal


摘要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 O-center dot(2)- and h(+) within a short time, the VLD photocatalyst of B001 nanosheets can completely inactivate 10(7) colony forming unit (CFU) mL(-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(+) and O-center dot(2)- generated.
著者Wu D, Wang B, Wang W, An TC, Li GY, Ng TW, Yip HY, Xiong CM, Lee HK, Wong PK
期刊名稱Journal of Materials Chemistry A
出版社Royal Society of Chemistry
頁次15148 - 15155
Web of Science 學科類別Chemistry; Chemistry, Physical; Energy & Fuels; Materials Science; Materials Science, Multidisciplinary

上次更新時間 2020-03-08 於 03:30