Photocatalytic materials and surfaces are recent area of interest for the environmental cleanup and hydrogen production. The present book provides the synthesis route for synthesis of tuned bandgap photocatalysts by hydrothermal and metal ion impregnation method and easily separable photocatalysts based on mesoporous materials such as zeolites and modification metal ion exchange in order to enhance the photocatalytic activity. Ag, Cu, Co, Fe, and Ni metal ions were used for impregnation and modifications. These photocatalysts were well characterized by sophisticated analytical techniques such...