Synthesis And Performances Of Several Kinds Of Carbon Composite Films By Electrodeposition

Electrodeposition is an economical and versatile processing technique for practical applications, large-scale, low-cost fabrication as well as the flexibility of use of a wide range of solvent-based manufacturing processes of carbon composite film. Choose Graphene,carbon nanotube and amorprhous carbon as nanomaterials.We report Mg ionic and polyelectrolytical(PDDA) functionalization of graphene nanosheets for the electrophoretic deposition of graphene films on Si substrate. The influence of different modification on the thickness, morphology and structure of the GNS film was investigated by using field emission scanning electron microscopy (FE-SEM) and Ramam spectrum, the biocompatibility of the GNS film was also studied. Furthermore, the deposition mechanism of the GNS film was proposed.We use Mg ionic functionalization of graphene nanosheets (GNS) films were deposited on Cu substrates. Then, Au nanoparticles were deposited on the surfaces of the GNSs by galvanic method between an aqueous solution of HAuCl4 and Cu substrate. As a result, Au nanoparticles/GNS (Au/GNS) composite films formed. The effect of different displacement-reaction time on the thickness,microstructure and composition of the as-prepared Au/GNS composite films was investigated by using Atomic Force Microscope (AFM) ,Field emission scanning electron microscopy (FE-SEM) and X-ray diffraction (XRD). The deposition mechanism of the Au/GNS composite films was proposed as well.Amorphous carbon nanoparticles (a-CNPs) on a graphene nanosheet (GNS)film, deposited on a silicon substrate, were synthesized using simultaneous electrodeposition from a methanol suspension of PDDA-modified GNSs. The a-CNPs are homogeneously deposited on the surfaces of the GNSs with good adhesion, forming a dense electrically conductive a-CNP/GNS composite film. After that, substitute CNT for GNS, a morphous carbon nanoparticles (a-CNPs) on a CNT film, were synthesized using Gradient electrodeposition.That such a-CNP/GNS composite film is a potential low-cost candidate for various applications, such as electrodes,capacitors, batteries and field emitters.GNS-CNT composite film were synthesized using co-electrophoretic deposition from a methanol suspension of PDDA-modified GNSs and PDDA-modified CNTs. Then, electrochemical propertie was reseached.