Artificial photosynthesis is a promising method for producing renewable energy by use of sun light. Artificial photosynthesis employing the modified Z-scheme of natural photosynthesis can be exploited both for the oxidation and reduction of water. Oxidation of water is successively achieved by the use of cobalt and manganese oxides with the cations in the 3+ state with one eg electron. Hydrogen can be produced by the dye-sensitized photochemical process or by the use of semiconductor heterostructures. In this presentation, ways of splitting water will be presented, followed by recent results obtained on the photochemical generation of hydrogen by different strategies specially those involving semiconductor heterostructures of the type ZnO/Pt/CdS or nanosheets of chalcogenides such as MoS2 and MoSe2 . Other novel strategies for hydrogen generation such as the solar-thermal route based on oxides will also be examined.