Abstract

Photocatalysis is gaining momentum for the degradation of persistent pollutants apart from other applications, including wide-scale industrial use. Non-Hazardous, efficient, greener approach and reusable properties make photocatalyst potential molecules for field application. Heterogenous make available solid surface, absorb photoenergy and initiate redox process for target molecules. Modification of heterogenous catalysis and improvement of the process is continuously accessed for better performance. The current chapter deals with some important practical aspects and challenges with some important heterogeneous catalysts like TiO2 , ZnO, CdS,etc.