Synthesis of titanium dioxide-silica-silver composites using a base catalyst as active antibacterial compound coated on the cotton fabric

Abstract

Titanium dioxide is a photocatalyst material that can inhibit the growth of microorganisms, bacteria, and viruses. Titanium dioxide can be modified into TiO2-SiO2-Ag composites to improve the ability to inhibit the growth of microorganisms due to increased adsorption capability and bactericidal properties. Composites of TiO2-SiO2-Ag were synthesized using tetraethylorthosilicate (TEOS) precursor in the presence of NH4OH base catalyst followed by the addition of TiCL and AgNO3 precursors. Coating of composite material on the cotton fabric was carried out by eight times dying. The coated cotton fabric was tested for antibacterial ability using UV-vis spectrophotometry method and agar disc diffusion method. FTIR data showed a typical functional group of the materials composing the composite. Analysis of XRD and UV-DRS showed that the composite material was amorphous with a bandgap of 2.43 eV. Antibacterial test results showed that the TiO2-SiO2-Ag composite material was able to inhibit the growth of Escherichia coli gram-negative bacteria in liquid media and solid media by 83.76% and 99%, respectively.