Preparation Of Large-area Graphene Mesh Composite Material And Application Research On New Energy And Pollutant Removing

Environmental pollution and energy crisis are the two major issues that could affect the survival and development of human society. It was an golden age of graphene in materials sector because of the carriers in graphene are massless Dirac Fermion.Kinds of graphene-based composite nanomaterials which can reinforce the optical,electrical, magnetic and mechanical properties of nanomaterials was made for the environmental remediation and energy storage. Our reasearch developed a safe operation, low energy consumption and environmentally friendly chemical vapor deposition(CVD) techniques for preparing large-scale porous graphene mesh in stationary carbon atmosphere; and modified the large-scale porous graphene mesh with Pt, Ru noble metal nanoparticles or narrow bandgap materials as a new semiconductor composite be applied to methanol fuel cell anode material and the control of POPs in water environment.The details are listed as follows:(1) Make improvements in the conventional CVD method:Using foamed nickel mesh as basement 、low-cost polyethylene glycol 6000(PEG6000) as the carbon source、nitrogen as protective gas 、 prepareing the large-scale porous graphene mesh(2cm×4cm).The optimal preparation conditions of high-quality graphene were investigate by alterring parameters such as temperature, and carbon source. High-quality large-scale porous graphene could be achieved when the carbon source was 0.15 g and the temperature was 600 °C. Electrodeposited on graphene with 3-5nm size Pt 、 Ru particle,then the formation of a high catalytic performance, strong anti-CO-toxic, long life methanol fuel cell anode materials.(2)Commercial titanium wire were woven into a flexible titanium mesh(1cm ×4cm),and anodic oxidation of highly ordered Ti O2 flexible mesh. Ni film were deposited on Ti O2 flexible mesh and Ti O2/G composite flexible mesh were prepared by an advanced CVD method useing PEG6000 as the carbon source because both nickel and titanium can catalyze the conversion of amorphous carbon to carbon graphene. When the high temperature crystallizing Ti O2 nanotubes, the carbon atoms of PEG6000 decomposed into high-quality graphene grown in situ on a flexible mesh Ti O2.High-performance Ti O2/G composite flexible mesh owns unique topography as G diffusion into the interior of the Ti O2 tube.(3)Cubic Cu2 O crystals with a lot of small burrs and sharp corners were modified onto the Ti O2/G NTs in Cu SO4 solvent by pulsed electrodeposition technique and in Na OH solvent by anodic oxidation technology which constructs a unique heterojunction photocatalyst bearing large surface area and high adsorbility. The Ti O2/G/Cu2 O catalyst shows intense absorption in the visible range due to the narrow bandgap of Cu2 O and the graphene accelerate the transfer of photogenerated holes and electrons. Under irradiation of solar light, a high efficiency in photoeleccatalytic purification of BPA was obtained by employing the Ti O2/G/Cu2 O NTs as photocatalysts.