Synthesizing and Evaluating the Photocatalytic and Antibacterial Ability of TiO/SiO Nanocomposite for Silicate Coating.

The TiO/SiO nanocomposite has been synthesized by a sol-gel method and investigated the effect of the SiO content (0, 5, 10, 15, 20, and 50%) on the rutile-to-anatase phase transition of TiO NPs. In order to increase the photocatalytic efficiency of the nanocomposite and decrease the price of material, the TiO/SiO Nc with content SiO of 15% sample is chosen for preparing silicate coating. The efficiency of photocatalytic MB and antibacterial ability in the air of W silicate coating (adding TiO/SiO Nc (15%)) achieve almost 100% for 60 h and 94.35% for 3 h, respectively. While the efficiency of photocatalytic MB and antibacterial ability of WO silicate coating (adding commercial TiO/SiO) is about 25-30% for 60 h and 6.02% for 3 h, respectively. The presence of TiO/SiO Nc (15%) with a larger surface area in W silicate coating can provide increased centers for absorption, photocatalytic reaction, and the contact between sample and bacteria lead to enhance the photocatalytic and antibacterial ability of W silicate coating.