Porous Fluorinated SnO2 Hollow Nanospheres: Transformative Self-assembly and Photocatalytic Inactivation of Bacteria
2014
Liu, Shengwei | Huang, Guocheng | Yu, Jiaguo | Ng, Tsz Wai | Yip, Ho Yin | Wong, Po-Keung
Highly porous surface fluorinated SnO₂ hollow nanospheres (SnO₂(F) HNS) were produced in high yield by a hydrothermal treatment of stannous fluoride in the presence of hydrogen peroxide. Two important processes in terms of oriented self-assembly and in situ self-transformation were highlighted for the formation of as-prepared SnO₂(F) HNS, which were largely relying on the directing effects of selected specific chemical species in the present synthesis system. Significantly, these SnO₂(F) HNS showed considerable activity in photocatalytic inactivation of a surface negatively charged bacterium, Escherichia coli K-12, in aqueous saline solution. The dominant reactive species involved in the inactivation process were also identified.
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