**6. Conclusions**

One of the most promising steps towards generating clean and renewable alternatives to fossil fuels is hydrogen production from solar energy by using photocatalytic materials. Different approaches have been employed in order to use solar energy more efficiently and to shift the photocatalytic activity in the visible range with stability and efficiency. TiO2 has been used most widely as a photocatalyst however it has also some limitations such as:


*New Strategy to Improve Photocatalytic Activity and Mechanistic Aspect for Water Splitting DOI: http://dx.doi.org/10.5772/intechopen.109960*
