Graphene/MoS2 hybrid structure and its photoresponse property

A novel graphene/MoS2 hybrid structure composed of reduced graphene oxide and MoS2 nanosheets has been successfully prepared via a facile one-step hydrothermal method. Under the hydrothermal treatment, pristine graphene oxide is reduced and tightly covered with liquid-exfoliated MoS2 nanosheets. The microstructures and properties have been examined by X-ray diffraction, scanning electron microscopy and Raman spectra. It is found that ultrathin MoS2 nanosheets with high crystallinity are located on the reduced graphene oxide. The obtained MoS2/graphene hybrid structure exhibits preferable photoresponse activity under the illumination of ultraviolet light compared to hybrid materials of MoS2 bulk and reduced graphene oxide. The improved photoresponse can be attributed to the extremely efficient charge separation, as well as MoS2 nanostructures of the hybrid structure. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.