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

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

doi:10.3389/fchem.2021.738969

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

Front Chem. 2021 Sep 17:9:738969. doi: 10.3389/fchem.2021.738969. eCollection 2021.

Authors

Manh-Cuong Le¹, Thu-Huong Le², Thanh-Huyen Bui Thi¹, Quang-Dat Nguyen¹, Thanh-Ha Do Thi¹, Minh-Nguyet Tran Thi¹

Affiliations

¹ Faculty of Building Material, National University of Civil Engineering, Hanoi, Vietnam.
² Faculty of Chemistry and Environment, Thuyloi University, Hanoi, Vienam.

Abstract

The TiO₂/SiO₂ nanocomposite has been synthesized by a sol-gel method and investigated the effect of the SiO₂ content (0, 5, 10, 15, 20, and 50%) on the rutile-to-anatase phase transition of TiO₂ NPs. In order to increase the photocatalytic efficiency of the nanocomposite and decrease the price of material, the TiO₂/SiO₂ Nc with content SiO₂ 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 TiO₂/SiO₂ 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 TiO₂/SiO₂) is about 25-30% for 60 h and 6.02% for 3 h, respectively. The presence of TiO₂/SiO₂ 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.

Keywords: antibacterial; nanocomposite; photocatalytic; silicate coating; sol-gel.