Preparation And Characterization Of Graphene Oxide/Inorganic Nanocomposites

In this paper, graphene oxide as a substrate material was used to covernano-inorganics to synthesize functional composites. The catalytic andelectrochemical properties were investigated. The structure and morphology of thecomposites were characterized by transmission electron microscopy(TEM), fieldemission scanning electron microscopy(FE-SEM), X-ray diffraction(XRD), fouriertransform infrared spectroscopy (FT-IR), Raman spectroscopy and Zeta-plus. Thecatalytic properties and electrochemical properties were tested by ultravioletvisible(UV-VIS) and electrochemical workstation, respectively.The main experiments include three sections:1. Graphene oxide/cuprous oxide-nanosphere(GO/Cu2O-NSs) have beensuccessfully synthesized via electrostatic interactions method. The10mg/LRhodamine B was regarded as industrial wastewater, and the catalytic degradationof organic dye molecule under the condition of50Hz ultrasound was investigatedthe catalytic degradation of Rhodamine B under the condition of ultrasound wereresearched. After reaction for120min, the result of contrast test shown that Cu2O, GOand GO/Cu2O of the degradation rates were about54.6%,76.9%,97.7%, respectively.GO/Cu2O nanocomposite provided excellent catalytic efficiency in the process ofdegradation of fluorescent dye.2. Graphene oxide/copper oxide-nanorods(GO/CuO-NRs) have been successfullyprepared by electrostatic interactions method. The reaction mechanism and reactioncondition were investigated. In the process of catalytic degradation of RhodamineB, the efficiency of GO/CuO-NRs was better than CuO-NRs. After reaction for60min, compare with the CuO-NRs degradation of78%, the degradation of GO/CuO-NRswas almost100%. The property of GO/CuO nanocomposite for electrocatalyticoxidation of glucose was investigated by cyclic voltammetry. The experimentalresults indicate that the GO/CuO nanocomposite modified electrode allows lowerworking potential of glucose than CuO.3. Graphene oxide/sulfur/polypyrrole(GO/S/PPy) temary nanocomposites havebeen successfully prepared by in-situ polymerization method, the sulfurnanosphere was encased by GO and PPy. The composite exhibits a highelectrochemical capacitance of834.07F·g1for the first cycle capacities, throughcyclic voltammetry test. In addition, the composite electrode exhibited excellent long-term cycle stability, only9.69%decrease of the specific capacitance isobserved after500cycles.4. Three-dimensional graphene oxide hydrogels has been fabricated through afacile one-step hydrothermal method. Before and after drying the hydrogels havekept good geometric morphology. After reaction for120min, the absorption ratesof RhB are about57.7%. To compare the absorption efficiency of common carbonmaterials, the graphene oxide hydrogels provided excellent efficiency.