Research On Polyaniline/graphene/nano-nickel Composite Materials

Nickel rianoparticle has been aroused extensive concern for its great values in the field of battery materials,magnetic materials,conductive layers,magnetic storage,and catalysts in recent years.Graphene are considered as an ideal composite carrier with its'unique structure and excellent properties compared with other carbon materials.The synthesis of graphene and metal composites are now being one of the hotspots in novel functional applications materials.Polyaniline also attracted huge attention for its'excellent performance in electrochemistry.In this research,graphene oxide(GO)was prepared by using modified Hummers method.Graphene/nickel nanoparticles composites were prepared with hydrothermal method.The technology and catalytic properties were studied in this work.Based on this composite,PANI/graphene/nickel nanoparticles composite is prepared and its structure and property are characterized.Graphene oxide was prepared by modified Hummers method.Different mass ratio of nickel salt and GO were used as raw materials and diluted hydrazine hydrate was used as reducing agent to synthesis graphene/nickel nanoparticles composites.Study shows that the composites would have the optimum particle size when the nickel salt and GO have the mass ratio of 7:1,the particle size of nickel nanoparticles are about 50nm.The carbon electrode which modified by graphene/nickel nanoparticles composites were used as the working electrode to explore its electrochemical activity in p-nitrophenol solution and glucose solution by cyclic voltammetric analysis.Studies have shown that compared with the unmodified electrode,the modified carbon electrode exhibits a higher electrochemical activity,and it provides a new method for detecting the p-nitrophenol and glucose in water.PANI/graphene/nickel nanoparticles composite is synthetized using in-situ polymerization method with ammonium persulfate being oxidant.The results of cyclic voltammetric analysis indicate that the conductivity of nanocomposites is enhanced by doping with graphene/nickel nanoparticles composites and the specific capacitance reaches maximum of 776.96F·g-1 with 30wt%graphene/nickel nanoparticles composite loading.