Graphene oxide (GO)/CdS composites were synthesized through the direct deposition of CdS nanoparticles onGO sheets [1].The high conductivity of GO sheets and the intimate hetero inter facial connection between GO sheets and CdS nanoparticles provided prominent advantages for enhancing light absorption and facilitatingthe transfer of photogenerated carriers from CdS nanoparticles,thus leading toan effectively separation of electron-hole pairs and consequently an improvement in photocurrent intensity [2,3].