Fossil fuels are the most substantial & extensively used sources of energy for today’s world. Simultaneously, the unconscious exposure of toxic pollutants and green-house gases allied with fossil energy is not viable with contexture. Solar energy were treated as an auspicious source of energy from ancient age because of its richness & cleanness. But problem arises in its capture, storage, transformation, and distribution. That’s why scholars are trying to convert this renewable light energy to a user friendly and viable form of energy. By analyzing recent studies on H₂ fuel it is considered as most lucrative choice for clean and sustainable fuel with high calorific value & zero pollution. This review offers an overview of most recent advancement in development of photo-catalyst for solar water splitting which is treated as a promising Green-Harvesting technique among all H₂ generation techniques. Here we discussed about various catalyst development techniques especially about doping techniques, reactor design and light scattering/trapping systems.We found that among all doping is a promising technique and a lots of study have been done on this technique than others like as Hetero junction, Dye sensitization, modification of surface or nanostructure formation. Hence we concluded with the decision that, more research are needed on hetero junction and nanostructure formation along with elemental doping.