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Preparation and antibacterial activity of Ag-TiO2 composite film by liquid phase deposition (LPD) method

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Abstract

A liquid phase deposition (LPD) method has been devised for the deposition of Ag-TiO2 thin films on ceramic tiles with glazed surface at a low temperature. The Ag-TiO2 thin films obtained were well-adhered, homogenous and coloured by interference of reflected light. The films were characterized by X-ray diffraction and scanning electron microscopy. From these analyses, it was found that silver ions were trapped in TiO2 matrix and their reduction could be achieved at 600°C annealing temperature. The antibacterial activity against S. aureus and E. coli has been studied applying the so called antibacterial-drop test. The Ag-TiO2 thin films exhibited a high antibacterial activity. AAS was used for the quantitave determination of silver ion concentration releasing from the Ag-TiO2 thin film. The releasing rate of silver ions from the Ag-TiO2 film was 0·118 μg/ml during 192 h. The antibacterial effect of Ag-TiO2 thin film before and after aging in a weathering chamber for 48 h was compared and the results show that the antibacterial activity is not compromised after weathering.

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Sun, S.Q., Sun, B., Zhang, W. et al. Preparation and antibacterial activity of Ag-TiO2 composite film by liquid phase deposition (LPD) method. Bull Mater Sci 31, 61–66 (2008). https://doi.org/10.1007/s12034-008-0011-7

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  • DOI: https://doi.org/10.1007/s12034-008-0011-7

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