Abstract
Cu (II) and Ag(I) together with TiO2 powder were deposited on conducting support substrates to enhance the photocatalytic ability. The catalytic efficiency was tested by monitoring the photocatalytic degradation and detriment of methylene blue (MB) and bovine serum albumin (BSA). The conformational change of BSA induced by catalysts was also observed by circular dichroism spectroscopy.The antibacterial activities were studied by Escherichia coli. Both MB and BSA could be degraded more efficiently than pure TiO2. After treatment with catalyst, the morphology of cells became twisted and rougher. Regular wrinkles were damaged and groove-like rift appeared on the surface. The fluorescence polarization has shown a significant decrease in membrane fluidity and the increase of permeability of cell membrane. Changes of the spectral profile of E. coli were observed, which suggested the damages of surface groups on the cell membrane.
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The authors would like to thank Harbin Engineering University for financial assistance. And thanks to Dr. Guo Bao of the Center for Biomedical Materials and Engineering of Harbin Engineering University for his useful comments and advice.
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Zhang, T., Yao, K. & Guo, Y. The Photocatalytic Activity of TiO2 Thin Film Deposited on Al Plate Together with Cu(II) and Ag(I). Biol Trace Elem Res 143, 1819–1827 (2011). https://doi.org/10.1007/s12011-011-9008-y
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DOI: https://doi.org/10.1007/s12011-011-9008-y