In recent years, TiO2 photocatalysis has received much research interest owing to its potential applications in the field of environmental remediation. However, the large bandgap of TiO2 and fast recombination of photogenerated charge carriers limit its overall photocatalytic efficiency. The large bandgap of TiO2 can be narrowed by modifying the electronic band structure, such as doping elements, forming oxygen vacancies. The fast recombination can be corrected by changing the effect of charge transfer, including the addition of suitable electron acceptors, heterojunction, Z-scheme. This brief review mainly describes the principal results of modification strategies on the TiO2 photocatalyst coatings formed on Al2O3 balls. The modification strategies encompass porous structure, nano-surface, carbon-doping, combination with TiC and graphene oxide. It is expected that the insights of this up-to-date review could guide the synergistic modification strategies to improve the performance of TiO2 photocatalyst coatings to achieve their maximum potentials.
Published on: July 12, 2021
Citation: Guan S, Hao L, Lu Y. 2021. A Review on the Modification Strategies of TiO2 Photocatalyst Coatings. J Appl Cat Chem Eng 1(2): 30-50.