Mechanistic study of the visible-light-driven photocatalytic inactivation of bacteria by graphene oxide-zinc oxide composite
Publication in refereed journal

香港中文大學研究人員

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摘要The visible-light-driven (VLD) photocatalytic activity of graphene oxide-zinc oxide (GO-ZnO) composite prepared by a simple hydrothermal method was evaluated toward the inactivation of Escherichia coli K-12. The results showed that GO-ZnO composite had excellent VLD photocatalytic bacterial inactivation activity, comparing with those of ZnO and GO, which was attributed to the strong interaction between ZnO and GO in the composite. Accordingly, an interaction induced VLD photocatalytic inactivation mechanism of the strong interaction of GO with ZnO within the GO-ZnO composite was proposed. GO served as a photosensitizer and facilitated the charge separation and transfer, thus boosted the massive production of reactive oxygen species such as center dot OHbulk, which was identified as the major reactive species from conduction band of ZnO, and resulted in a remarkable enhancement of bacterial inactivation efficiency. Moreover, GO-ZnO composite showed obviously superior photocatalytic bacterial inactivation within 10 min under natural solar light irradiation, indicating that GO-ZnO composite has great potential in wastewater treatment and environmental protection. (C) 2015 Elsevier B.V. All rights reserved.
著者Wu D, An TC, Li GY, Wang W, Cai YC, Yip HY, Zhao HJ, Wong PK
會議名稱1st International Workshop on Graphene and C3N4-based Photocatalysts (IWGCP)
會議開始日05.06.2015
會議完結日08.06.2015
會議地點Wuhan
期刊名稱Applied Surface Science
出版年份2015
月份12
日期15
卷號358
出版社Elsevier
頁次137 - 145
國際標準期刊號0169-4332
電子國際標準期刊號1873-5584
語言英式英語
關鍵詞Bacterial inactivation; Graphene oxide-zinc oxide composite; Photosensitizing mechanism; Visible light driven photocatalyst
Web of Science 學科類別Chemistry; Chemistry, Physical; Materials Science; Materials Science, Coatings & Films; Physics; Physics, Applied; Physics, Condensed Matter

上次更新時間 2020-15-10 於 00:57