Synthesized N-doped Graphene-based Composites From Two Different Metal Organic Frameworks

Carbon materials have generated a great deal of attentions for scientists becauseof its usages in energy storage system, environment protection, and industry catalysis.Graphene, an important member among the family of carbon element with manyallotropes, such as graphite, diamond, and carbon nanotubes, has attracted intensiveattention for the excellent properties, such as high mechanical strength, high thermalconductivity and high electron mobility. At present, graphene-based composites areone of the active topics in the research interests in graphene for their possibleapplications in catalysts, solar cells and electrochemical energy storage. The resultantcomposite materials that combine both of the excellent properties afforded fromgraphene and the special properties possessed by the related components will bring inmore interesting properties and applications to the products.Metal organic frameworks with organic ligands and metal ions in their skeletonshave been taken more interests for their new structures rather than their applications.Nowadays some research groups have used MOFs as the precursors for the synthesisof porous carbon, metal and metal oxide nanoparticles. In this paper, we firstly choosetwo kinds of MOFs (MOF-5and MIL-100) as the precursors for the syntheses ofgraphene-based composites with a sacrifice template together by a one pot pyrolysisprocess. The results show that the graphene-based composites have nanoparticleslocated on several layers of graphene and possess wonderful property of lithiumbattery. This method opens a new and facile way to prepare graphene-basedcomposites avoiding the synthesis of GO.There are four chapters in this paper. First, it summarized the research status ofgraphene and graphene-based composites in chapter one. In chapter two, wesynthesized N-doped graphene/Fe-Fe3C (NG/Fe-Fe3C) nano-composite fromMIL-100(Fe) and test its anode performance in lithium batteries. Besides that, we alsoexplore the synthesis mechanism of this method. In chapter three, we used a kind of mental organic frameworks of Zn (MOF-5) as a precursor to synthesize N-dopedgraphene/ZnCN2(NG/ZnCN2) nano-composite and made a series of characterizationfor the product. At the end, we summarized the researches followed by an expectationin chapter four.