Functionalized Mesoporous Materials, The Adsorption Properties And Catalytic Performance

Currently, the environmental pollution has become one of the most concerns in sustainable development. Some heavy metal pollution and a number of expensive metals can not be reused which caused energy and environmental pollution. To solve this problem, This thesis, with the aim to realize green chemistry, studies the new and efficient adsorption of mesoporous materials to carry out the adsorption of heavy metals in waste water recycling, in order to achieve the effect of green environment. And the absorbent material can also be used multiple times however the effect is still very good.new efficiency heterogeous catalysts. On the other hand, the use of heterogeneous catalysts and water medium could also reduce the pollution from heavy metallic ions and organic solvents,of course the catalysts could be used repetitively, leading to the decrease in cost. we designed two research programs:In the first part, a controllable thiol functionalized mesoporous catalyst was prepared via a co-condensation method. The key feature is that organic silica resource, double sulfur silicon source, is splitted in an in situ synthetic process to keep 1:1 thiol mole ratio on the mesoporous materials.Then we test them to absorb the mercury(II) ion and the result is very good. Furthermore, they could be recovered and reused but still highly active to achieve our environmental philosophy.In the second part, spherical nanoparticles with well-ordered two dimensional hexagonal mesoporous channels were synthesized by one-step aerosol-assisted self-assembly (AASA) to use tetraethoxysilane (TEOS) as silicon source and cetyltrimethylammoniumbromide (CTAB) as template. mesoporous silica-supported chiral Rh catalysts with ordered two-dimensional hexagonal mesostructures were prepared by directly postgrafting homogeneous Rh catalysts on AASA.. The catalyst exhibit highly catalytic activities and high enantioselectivities in the asymmetric transfer hydrogenation of aromatic ketones. Furthermore, the heterogeneous catalysts can be recovered easily and reused more than 7 times without affecting obviously their enantioselectivities, showing good potential in industry application.