The Synthesis Of Ordered Mesoporous Carbon-silicon Dioxide Nanospheres Supported Metal Nanoparticles

The unique chemical and physical properties of mesoporous materials make them have broad application prospects in the field of catalysis. Large specific surface area, neat and orderly open channel,appropriate aperture and channel are key factors to realize high catalytic efficiency. Micron grade of channel is against to the diffusion and transmission of substance in the pore.On the contrary,the channel of mesoporous materials in nanoscale have significant effect on the dynamics of adsorption capacity and adsorption.Its short channel makes the diffusion and transmission of substance more easier. It can realize high catalytic efficiency when this material used in catalysis.So,it is meaning full to generate this kind of material.Based on the triconstituent co-assembly method,we have synthesised the highly ordered carbon-silicon dioxide nanospheres and carbon-silicon dioxide nanospheres supported metal nanoparticles material.The thesis is composed of three chapters. The first chapter is a literature review, including the synthesis of mesoporous carbon,silicon dioxide and carbon-silicon dioxide material,the research progress of mesoporous materials.The second chapter,highly ordered carbon-silicon dioxide nanospheres materials are synthesized via a triconstituent co-assembly method by using low-polymerized phenolic resin as carbon sources,triblock copolymer F127as a template,APTMS as the sources of silicon dioxide.The mass fraction of silicon dioxide can be adjusted between17%-1%. The results reveal that the carbon-silicon dioxide nanospheres have ordered mesostructure,high surface areas (～550m2/g), large pore volumes (～0.47cm3/g),uniform pore sizes (～2.8nm).On the basis of this process,we have synthesized carbon-silicon_dioxide nanospheres supported metal nanoparticles material by a impregnation method of coordination,wo get the materials of MCSN-m. XRD,TEM,SEM and N2sorption results reveal that this material have uniform spherical morphology in large domains,high surface areas (-530m2/g), large pore volumes (-0.40cm3/g),uniform pore sizes (～2.8nm).And the metal nanoparticles are highly dispersed in the nanospheres.The third chapter is the summarise of thia article.