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Abstract: We report a facile solvothermal synthesis of reduced graphene oxide/Zn0.8Cd0.2S (GZCS) hybrid nanomaterial as a photocatalyst, in which Zn0.8Cd0.2S nanoparticles were homogeneously distributed on the surface of reduced graphene oxide (RGO), showing a good visible light response. The photocatalytic activities for as-prepared GZCS were evaluated by the degradation of methylene blue (MB) in aqueous solution under visible light irradiation. The results showed that the GZCS had higher photocatalytic activity than pure Zn0.8Cd0.2S. The GZCS with 5wt% RGO content exhibited the highest photodegradation efficiency of MB (96%), which was 2.7 times of pure Zn0.8Cd0.2S. And it also showed high photocatalytic stability. [Copyright &y& Elsevier]

Abstract: In the present study, a facile method is developed for the synthesis of graphene oxide-Ag nanocomposite (GOAg). The method involves the application of in situ photochemical deposition and growth processes under certain alkaline environments in the absence of chemical reductants and surfactants. Silver nanoparticles with monodisperse size are well dispersed on the surface of graphene oxide (GO). The roles of GO and NaOH in the formation of GOAg are discussed. A corresponding formation mechanism of GOAg is proposed. Fluorescence quenching and Raman enhancement are examined as well. [Copyright &y& Elsevier]

Abstract: A hybrid material of graphene oxide (GO) sheets beaded with ZnO nanoparticles was prepared. The material extends over a few hundred square nanometers, in which the ZnO nanoparticles (average diameter (∼5nm)) are dispersed evenly on the GO sheet. Both the surface photovoltage or surface photocurrent intensity for the material are much stronger than for pure ZnO nanoparticles, meaning that the free charge carriers can effectively be transferred from ZnO nanoparticles to GO sheets, which can serve as a probe to monitor the electron transfer from excited ZnO to GO. Anchoring ZnO nanoparticles on two dimensional carbon nanostructures such as GO can pave a way towards the design of ordered nanostructure assemblies that can harvest light energy efficiently. [Copyright &y& Elsevier]