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.