Metal-doped TiO2 photocatalyst as antibacterial - A Review

Abstract

Photocatalyst nanomaterials are developing as new materials for many applications. Titanium dioxide (TiO2) is a photocatalyst nanomaterial widely applied to solar cells, chemical sensors, health products and paint pigmentation. In this review article, we aim to provide a comprehensive overview of the development of the metal as a TiO2 doping material and its application as an antibacterial. TiO2 as an antimicrobial photocatalyst has been widely reported. Sol-gel synthesis method on semiconductors can make nanoparticle size, not agglomerate, homogeneous, pure and control mass distribution. Metal-doped TiO2 can activate the performance of TiO2 to work on visible light, thereby increasing the performance of TiO2 in its application as an antibacterial. Nickel (Ni), copper (Cu), manganese (Mn) and sulfur (S) have been shown to affect increasing the performance of TiO2 to inhibit bacteria in visible light. TiO2/Ni has antibacterial activity against Staphylococcus aureus (S. aureus) bacteria. TiO2/Cu has antibacterial activity against Escherichia coli (E.coli), S. aureus, Klebsiella pneumonia (K. Pneumonia) and Saccharomyces sp.. TiO2/Mn/S has antibacterial activity against Bacillus coagulans (B. Coagulans) and (K. Pneumonia). This review can add to the knowledge and the latest developments of metaldoped TiO2 photocatalysts based on antibacterial properties to be applied to water-purifying membranes, skin health and self-cleaning paints.