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Sol–gel preparation and characterization of antibacterial and self-cleaning hybrid nanocomposite coatings

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Abstract

ZnO–TiO2, SiO2–TiO2, and SiO2–TiO2–ZnO hybrid nanocomposite coatings were synthesized based on sol–gel precursors including tetramethoxysilane (TMOS), 3-glycidoxypropyl trimethoxysilane (GPTMS), tetra(n-butyl orthotitanate) (TBT), and zinc acetate dihydrate. The hybrid network was characterized by FTIR, FESEM, and EDAX techniques. Results indicated that inorganic particles’ size was of nanoorder (20–30 nm), with very uniform distribution and dispersion. Photocatalytic and self-cleaning activities of these coatings were further investigated by degradation of methylene blue in an aqueous solution (20 ppm) at visible light irradiation, indicating photocatalytic performance of the coatings containing ZnO and TiO2 nanoparticles. The antibacterial effect of the coatings was investigated for inhibition and inactivation of cell growth, with the results showing the same antibacterial activity for ZnO–TiO2 and SiO2–TiO2–ZnO coatings against Escherichia coli and Staphylococcus aureus; the activity was, however, higher than that of SiO2–TiO2 hybrid nanocomposite coatings.

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Authors and Affiliations

  1. Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran

    Seyed Armin Zare Estekhraji & Sahar Amiri

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  1. Seyed Armin Zare Estekhraji
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  2. Sahar Amiri
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Correspondence to Sahar Amiri.

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Estekhraji, S.A.Z., Amiri, S. Sol–gel preparation and characterization of antibacterial and self-cleaning hybrid nanocomposite coatings. J Coat Technol Res 14, 1335–1343 (2017). https://doi.org/10.1007/s11998-017-9932-7

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  • DOI: https://doi.org/10.1007/s11998-017-9932-7

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