A Brief Review: Immobilization of TiO₂ Photocatalyst Materials on Supporting Surfaces for Degradation of Organic Pollutants

Abstract

The process of final disposal of industrial wastewater is an important issue to avoid contamination. Photocatalyst technology can be a solution to waste control by degrading organic pollutants. The synthesis process of TiO2 catalyst immobilized with supporting materials has been proven more efficient in photocatalyst activation. This gives a high UV adsorption power and does not require further handling of the final purification process because it does not produce a catalyst suspension. Immobilization methods are simplest but still produce high efficiency, namely, the thermal milling method and the sol-gel method. Both methods can produce 97% efficiency. Immobilization using thermal milling can take quickly and only through one step but requires a long time in the degradation process. Besides, immobilization using the sol-gel method requires several steps, but the process of degradation is fast. The method used must be by the type of support material, the pollutants to be degraded, and the operating system like coating time. This paper focuses on the immobilization method suitable to support materials to maximize the degradation process.