The effect of NPs addition on the photocatalytic and antibacterial effectivity of composite TiO₂/SiO₂ paint

Abstract

TiO2 in the anatase allotropic modification is well known for its photocatalytic activity. When the anatase is irradiated by UVA light, it forms an electron-hole pair which can participate in redox reaction. Thus, anatase-based layers are suitable for decomposition of organic compounds. Surface self-cleaning ability as well as antimicrobial efficacy are therefore key features for TiO2 based layers. The present paper deals with a study of ZnO, CuO and Ag NPs addition on the antibacterial and photocatalytic effectivity of TiO2/SiO2 paint.

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

“…Chen et al (2019) have indicated that coating material containing TiO 2 is a promising self-cleaning building material (Chen and Poon, 2009). Unfortunately, TiO 2 exhibits limitations such as small surface area, poor absorption property, and facile agglomeration (Jakubickova et al, 2020). In addition, the photo-generated electron and hole of TiO 2 NPs undergo rapid recombination, which can move to the surface and participate in a redox reaction to generate reactive oxygen species such as hydroxyl radicals (OH•) and superoxide (O 2-) (Petronella et al, 2017a;Chen et al, 2019).…”