Photocatalysis: Introduction, Mechanism, and Effective Parameters.- Optimization of process, Mechanism and Kinetics study for Photocatalytic oxidation.- UV active photocatalytic material and their challenges.- Visible light active material for photocatalytic applications.- Novel visible active photocatalytic material: Doped materials and other new materials.- Hybridized Nanomaterials for enhancing Photocatalytic activity.- Laser-produced photocatalysts.- Graphene based Nanocomposites.- Polymeric material/nanocomposites for photocatalytic activity.- Carbon-Based Nanocomposites for Visible Light-Induced Photocatalysis.- Rare earth doped photocatalysts for enhanced photocatalytic reactions.- New photocatalytic materials based on nanodiamonds forming complexes with diphthalocyanines of rare earth elements.- Complexes of radachlorine with polyvinylpyrrolidone and nanodiamonds for singlet oxygen generation in aqueous media.- Role of Metal Nanoparticles on Nanocomposites for Visible Light-active photocatalysis.- Natural Sensitizers for photocatalytic activity.- Role of Surface oxygen vacancy to enhance photocatalytic activity.- Immobilization of photocatalytic material on the suitable substrate.- Degradation of Organic Contaminants in Water using photocatalytic material.- Photocatalytic Removal of Metallic and Other Inorganic Pollutants.- Removal of Air-/Water-Pollution and Self-Cleaning/ Antibacterial Applications by photocatalysis.- Interface engineering of nano-photocatalysts for hydrogen evolution reaction.- Emerging Photocatalysts for Hydrogen production..- Electrocatalytic and photocatalytic water splitting.- Novel Solid Photocatalysts for Hydrogen Generation from Aqueous Phases.- Bandgap engineering of heterostructures for visible light driven water splitting.- Photocatalytic CO2 reduction.- Conclusions and Future work.