Facile synthesis of oxygen defective yolk–shell BiO2−x for visible-light-driven photocatalytic inactivation of Escherichia coli
Publication in refereed journal

替代計量分析
.

其它資訊
摘要Oxygen defective yolk–shell BiO2−x spheres are successfully synthesized by a facile solvothermal method for the first time. The variations between the diffusion rate of the core and the formation rate of the shell, which are caused by the temperature gradient originating from the heating rate, result in the formation of BiO2−x spheres with different interior structures. The as-synthesized yolk–shell BiO2−x spheres possess distinctive oxygen vacancies, which are demonstrated by electron paramagnetic resonance and X-ray photoelectron spectral analyses. The oxygen vacancies with a high affinity for molecular oxygen, and the enhanced light absorption ability resulting from the multiple reflections of the incident light within the interior voids, play key roles in the photocatalytic bacterial inactivation. Scavenger studies indicate that O2− and H2O2 are the major reactive species guaranteeing the prominent oxidation ability toward the bacterial cells. This study would not only provide direct evidence for the oxygen vacancy promoted photocatalytic bacterial inactivation, but also shed light on the design of highly efficient photocatalysts with intricate yolk–shell structures.
著者Sun Hongli, Yip Ho Yin, Jiang Zhifeng, Ye Liqun, Lo Irene M.C., Wong Po Keung
期刊名稱Journal of Materials Chemistry A
出版年份2018
月份3
日期28
卷號6
期次12
出版社Royal Scoiety of Chemsitry
出版地Lonodn
頁次4997 - 5005
國際標準期刊號2050-7488
電子國際標準期刊號2050-7496
語言美式英語
關鍵詞Yolk-shell structure, Photocatalysis, Bacterial disinfection

上次更新時間 2020-02-06 於 00:16