Ordered Mesoporous Metal Oxides/carbon Composite Material Preparation And Catalytic Properties Of Research

Mesostructured materials, owing to special structure, can be applied in several areas such as electrochemistry, adsorption, catalysis, pharmaceutical and biotechnology and so on.Recently, the synthesis of novel and ordered mesoporous nanocomposites by co-assembly of organic inorganic, biological materials and other functions of different building units has attracted much attention. In this thesis, the preparation of nanocomposite materials such as Nb2O5/C, Nb-W/C, WO3/C and theirs applications in the reaction of fructose dehydration have been investigated. Detailed research works are listed as follows:A series of nanocomposite materials such as Nb2O5/C, Nb-W/C, WO3/C were prepared via evaporation induced tri-component co-assembly method. The results show that the structure of the nanocomposite materials are influenced significantly by the time and temperature of aging, and the time and the temperature of calcination. In addition, thermal stability and the ratio of inorganic precursor to organic precursor were also investigated. The results show that the composition of the ordered mesoporous materials can be tuned in a wider range. The morphological features and related physical parameters of the materials were studied by TEM, XRD, BET etc. The results demonstrate that the materials possess large specific surface area, highly ordered pores, and narrow pore size distribution. The success preparation of above materials is mainly attributed to hydrogen bonding interaction between soluble resol polymer, metal chloride and triblock copolymer.The nanocomposite materials show excellent catalytic activity when they were applied in the dehydration reaction of fructose to HMF. Nb-W/C nanocomposite material exhibits the highest catalytic activity, the HMF yield reaches82%under the optimum reaction conditions. The optimum reaction conditions are as follows:DMSO5.0g, fructose/catalyst (w/w)=10:1,120℃,2h.