Mechanistic study of the visible-light-driven photocatalytic inactivation of bacteria by graphene oxide-zinc oxide composite
Refereed conference paper presented and published in conference proceedings


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 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.
著者Wu D., An T., Li G., Wang W., Cai Y., Yip H.Y., Zhao H., Wong P.K.
期刊名稱Applied Surface Science
詳細描述organized by Wuhan University of technology,
出版社Elsevier BV
頁次137 - 145
關鍵詞Bacterial inactivation, Graphene oxide-zinc oxide composite, Photosensitizing mechanism, Visible-light-driven photocatalyst

上次更新時間 2021-14-06 於 23:56