Photocatalysis is defined as a photo-induced advanced oxidation processes, which is a process generating powerful oxidizing species such as OH and H2O2 to decompose pollutants and microbes in aquatic environment Photocatalytic disinfection was firstly reported by Matsunaga et al. To successfully inactivate Escherichia coli. Since then, photocatalysis was extensively studied and proved to be a cost-effective, safe and promising alternative for water purification and wastewater treatment in the last three decades.