Dissertation > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials

The Synthesis and Modification of Mesoporous Nano-Material

Author ZhangYuZhe
Tutor ZhouYaPing
School Tianjin University
Course Chemical Engineering
Keywords SBA-15 modified Activated carbon Phenolic Resin Unshaped template
CLC TB383.1
Type Master's thesis
Year 2007
Downloads 200
Quotes 2
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Inorganic mesoporous material with the original microporous and macroporous zeolite materials, only moderate aperture (2-50nm), has a large surface area and thickness, and has high thermal stability and hydrothermal stability sex. Therefore, the development and research structure of mesoporous material with excellent performance in recent years has become a research focus. 1998 University of California Stucky, who used non-ionic surfactants synthesized a new type of Mesoporous Silica SBA-n series, especially in the SBA-15 is most noticeable. Because it has a very good structural properties, the better hydrothermal stability, stable skeleton structure, easy modification of the inner surface, a wall and easily doped amorphous framework composition, etc., so in the chemical industry, environment and energy , biotechnology, adsorption and separation, catalysis and optical, electrical and magnetic fields have great prospects for development. However, SBA-15 larger aperture limits the field of application of the adsorption, the present work is one of the modified SBA-15 materials, and the development of mixed-gas adsorption and separation in the field of application. In the process of modification of SBA-15, using benzene as a carbon source, using the CVD method on SBA-15 carbon deposition holes, in order to achieve the purpose of controlling aperture. In the process of testing a modified reaction time and concentration of benzene, initially set at a certain temperature carbonization optimal reaction conditions, laid the foundation for further work. Unlike inorganic mesoporous materials, carbon-based materials in the preparation of raw numerous holes in which phenolic resin because of its high carbon content, easy-activated pore, the preparation of activated carbon adsorption capacity, low price and other advantages are widely used in Preparation of nano-carbon materials. The resulting catalytic activation method for preparing a broad pore size distribution of nano-carbon material, while the carbon material prepared by the template though narrow pore size distribution, but the cost is higher. This experiment attempted to use amorphous phenolic resin template method through preparation of activated carbon, effects of different types of phenolic resins, carbonization time, heating rate and other factors on the impact of the product. Based on the analysis of the product, the molten resin Phenolic high yield preparation of activated carbon, but a wide pore size distribution, pore volume is small, the optimum ratio of different materials under different reaction conditions, and the molten Phenolic resin itself difficult to save, not to industrial production. Semi-molten resin yield, while relatively low melting type phenolic resin, but its narrow pore size distribution of activated carbon, large pore volume, if the conditions of its preparation for further study, is expected to prepare a low price, high performance activated carbon

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