Research On Electrochemistry Property, Catalytic Activity And Fabrication Of Bionic Super Hydrophobic Surface Based On Transition Metal Oxides

Development of new materials has opened up new areas for research into nanoscience and technology. Transition metal oxides are widely distributed in nature, in whichnanomaterials based on manganese oxides and cobalt oxides with special performance inoptical, electrical, magnetic, catalytic and field emission properties, have broadapplication prospects in sensor, catalysis, magnetism, energy storage, conversion andother fields. In addition, transition metal oxides nanomaterials has advantages of simplepreparation, higher controllable morphology and electrochemical activity, so it attractspeople’s attention become of a hot research at the present stage.In this paper, we report the electrochemical and catalytic properties of transitionmetal oxide nanomaterials. First, the application of transition metal oxide compositenanomaterials in electrochemical capacitors is discussed. Second, Co3O4nanoparticles@MnO2nanorods was successfully synthesized. The catalytic efficiency of the complexcatalyst was greatly improved when compared with the single component catalyst.Finally, transparent Co3O4superhydrophobic surface on a glass substrate and ITOconductive glass surface was successfully prepared. The main research contents and theresults are as follows:(1) Co3O4@MnO2nanostructures with a series of different sizes and morphologieswere successfully synthesized by controlling the growth conditions, in which a simpleand controllable hydrothermal method was employed. Samples were detected by X-raydiffraction (XRD) and field emission scanning electron microscopy (SEM)characterization, which showed that cobalt carbonate hydroxide was transformed intoMnO2by heat treatment, further confirming that MnOOH is the precursor of Co3O4nanorod. In the catalytic process, we used5kinds of industrial dyes, such as methyleneblue, crystal violet, malachite green, orange II, rhodamine as catalyst activity test.Results show that, the above5kinds of dyes can be degraded under different degree of inwith Co3O4@MnO2nanocomposite catalyst existed. When the mass ratio of Co:MnO2isabout1:3, the time for the complete degradation of crystal violet was the shortest when Co3O4@MnO2complex was used as catalytic in the test process, compared with MnO2orCo3O4catalyst with single component, Co3O4@MnO2nanocomposite catalyst has highercatalytic efficiency of crystal violet.(2) Transparent Co3O4superhydrophobic nanowire films grown on the surfaces ofglass slides and ITO conductive glasses surface was successfully fabricate through ahydrothermal method and thereafter high-temperature calcination, and then properchemical modification. After modified by perfluorodecanoic thiol, a super hydrophobicsurface with a contact angle greater than150°was formed based on the surfaceroughness of micro. Results show that, the thickness of the transparent Co3O4superhydrophobic nanowire films depends on the time of hydrothermal growth, whichfurther affect the light transmittance of the superhydrophobic films. It is found that whenthe time of hydrothermal growth is up to5h, the light transmittance of the superhydrophobic film reach to80%.