The Preparation Of Graphene Based Compounds And Their Catalytic Performance Study

Graphene is a kind of thin film materials with only a single atom thickness of sp2-hybridized carbon. Unique structure of graphene bring excellent thermal, mechanical, electrical, optical properties and larger surface area. Therefore, composites based on graphene have been widely studied and applied in many fields.In this paper, CoO nanoparticles were prepared through esterification of cobalt acetate and ethanol, then the effects of Hexadecyl trimethyl ammonium bromide (CTAB), Hexamethylenetetramine (HMTA) and solvents on the morphology of CoO were studied. Different morphologies of CoO on the catalytic effects of the thermal decomposition of AP were studied by Differential scanning calorimetry (DSC).Graphite oxide was prepared by pre-oxidation and secondary oxidation with graphite as raw materials, then forming stable GO suspension by peeling off through ultrasonic in solution. CoO nanoparticles were synthesized through esterification of cobalt acetate and ethanol, and then grew on the surface of GO, forming CoO/GO nanocomposites. The catalytic decomposition effects of GO, mixture of GO and CoO, CoO/GO nanocomposites on AP were studied. The results indicated that CoO/GO nanocomposites possessed the best catalytic effect, which could make decomposition temperature of AP reduce134℃and heat release increase85OJ/g.At160℃, solution restored Co2O3into Co3O4on the surfaces of graphene oxide in Solvothermal system, forming Co3O4/GO composites. Co3O4/GO composites prepared by this method had good catalysis activity, which could largely low decomposition temperature of the AP and significantly increase heat release.CoFe2O4/GO nanocomposites were prepared by alcohol thermal method. At200℃, Cobalt chloride and iron chloride hydrolyzed to CoFe2O4nanoparticles under the action of sodium acetate and then those nanoparticles were adsorbed onto grapheme sheets reduced by ethylene glycol, forming CoFe2O4/GO composites. The thermal decomposition effects of CoFe2O4and CoFe2O4/GO on AP were studied. The results indicated that CoFe2O4/GO composite was an excellent catalyst.