AUTHOR=Le Manh-Cuong , Le Thu-Huong , Bui Thi Thanh-Huyen , Nguyen Quang-Dat , Do Thi Thanh-Ha , Tran Thi Minh-Nguyet 

TITLE=Synthesizing and Evaluating the Photocatalytic and Antibacterial Ability of TiO2/SiO2 Nanocomposite for Silicate Coating

JOURNAL=Frontiers in Chemistry

VOLUME=9

YEAR=2021

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2021.738969

DOI=10.3389/fchem.2021.738969

ISSN=2296-2646

ABSTRACT=<p>The TiO<sub>2</sub>/SiO<sub>2</sub> nanocomposite has been synthesized by a sol-gel method and investigated the effect of the SiO<sub>2</sub> content (0, 5, 10, 15, 20, and 50%) on the rutile-to-anatase phase transition of TiO<sub>2</sub> NPs. In order to increase the photocatalytic efficiency of the nanocomposite and decrease the price of material, the TiO<sub>2</sub>/SiO<sub>2</sub> Nc with content SiO<sub>2</sub> 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<sub>2</sub>/SiO<sub>2</sub> 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<sub>2</sub>/SiO<sub>2</sub>) is about 25–30% for 60 h and 6.02% for 3 h, respectively. The presence of TiO<sub>2</sub>/SiO<sub>2</sub> 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.</p>