Graphene has extraordinary physical and electrical properties, so that it has attracted great interest in different scientific areas in the last years. While graphene is a nanomaterial with high electron mobility and elevated conductivity, it has been reported that bare graphene, graphene oxide with new synthesis methods or the combination with other semiconductor materials can be used as catalyst materials. We examined the photocatalytic activity and catalytic recyclability with some kinds of semiconductor/graphene (binary type) or semiconductor/graphene-TiO2(ternarytype) nanocompositesfabricatedwithmodifiedchemicalandphysicalmethods.The prepared composites were characterized by some kinds of spectroscopic techniques including transmission electron microscopy (TEM), Raman spectroscopic analysis, and X-ray photoelectron spectroscopy (XPS). These graphene-based photocatalysts has a great promise for various material/device applications, including solar cells, standard dyes and commercial dyes decomposition and H2evolution.