Preparation And Application Research Of Multifunction Carbon Materials With Flake Graphite

Preparation and application research of multifunction carbon materials (MCM; trade name: Expandable graphite) had been reported. In the paper, Flake graphite was applied as raw materials, and the methods of chemistry oxidation and ultrasonic were used to prepare MCM. On the basement of the methods, the characteristic of heat expansion was applied to prepare the composites, of which exfoliated graphite loaded sulfur-containing and sulfur-free nanometer TiO2 (Nano-TiO2/expanded graphite composites, Nano-TiO2/EGC), and containing-sulfur nano-TiO2/EGC was used to photocatalyze degradation and adsorb for methyl orange (MO) and pesticides simulation wastewater. Meanwhile, Flake graphite was applied as as raw materials, and the methods of chemistry oxidation and ultrasonic were used to prepare MCM which had the characteristic of sulfur-free and low temperature expansion. The MCM was applied as graphite solid vesicant, and polyaniline/graphite composites were prepared in situ synthesis by the heat expansion technology. The morphlogy of polyaniline was changed in the process of heat expansion, and the conductivity of polyaniline was also enhanced.In the process of MCM preparation, the research was combined with the production close. Sulfur-free MCM was prepared successfully by the chemistry oxidation method which possessed intellectual property right completely and concentrated or thin nitric acid or nitrogen-containing compounds was not applied. Meanwhile, sulfur-MCM provided with the characteristics of low temperature expansion. The method not only satisfied with the research in the paper, but also established a foundation for producing MCM on a large scale. In addition, MCM which possessed higher expansion temperature was also prepared by the methods of chemistry oxidation and ultrasonic, and the methods would also supply a foundation for producing the MCM. It was very important that ultrasound irradiation technology was applied to prepare MCM. Meanwhile, the technology was also a renovation of technics route.In the process of MCM application, the characteristic of heat expansion was applied to prepare sulfur-containing and sulfur-free Nano-TiO2/EGC for the first time via changing the intercalation compounds. The characterization of XRD, SEM and TEM exhibited that they were composed by nanometer TiO2 and exfoliated graphite. The experiment results illuminated that Nano-TiO2/EGC owned the photocatalysis degradation of Nano-TiO2 and the adsorption capability of exfoliated graphite for MO and pesticides simulation wastewater synchronously. Meanwhile, the experiment results also exhibited that the crystal structure of Nano-TiO2 were influenced by the expansion temperatures, and the photocatalysis degradation for MO and pesticides was influenced by the sulfur content inside Nano-TiO2/EGC. In addition, MCM was used as graphite solid vesicant (GSV), and the technology of which polyaniline/exfoliated graphite composites (PAN/EGC) were prepared by in situ synthesis and heat expansion was set up by synthesizing expandable polyaniline/GSV composites (EPAN/GSVC) and heating the expansion of EPAN/GSVC later. The characterization of XRD, SEM and IR shew that PAN/EGC provided with the spumous morphology and the structure which polyaniline covered on exfoliated graphite.