Synthesis, Functional Modification And Catalytic Performance Of Mesoporous Materials In The Media Of Weak Acids

The fabrication of porous matter has recently experienced enhanced attention in materials chemistry. In 1992, the discovery of M41S mesoporous silicas brought about the beginning of a new age in the porous materials chemistry by opening a new way for expanding the available size of micropores in zeotypes. Because the pore size distribution is closely related to the functional capability, the control of the pore structure over a broad range from nano- to micrometer scales is very important for practical applications of the M41S family in chromatography, catalysis, optical devices, chemical sensors, and drug delivery. In this thesis, mesoporous materials with various components, structures, morphologies and pore size distributions were prepared by using cation and non-ionic surfactants as structure directing agents. These studies on the porous materials are likely to be useful in the future application of catalysis and advanced optical materials.This contribution includes mainly the following five chapters.In Chapter 1, we focused on the development and application of mesoporous materials with specific structure.In Chapter 2, the highly ordered SBA-15^* was first prepared in the media of tartaric acids, instead of those common used acids, and by using triblock copolymer P123 as template. The effect of tartaric acid on the porous structure and morphology of SBA-15^* was systematically investigated. In comparison with typical SBA-15 silicas, SBA-15^* displays thinner pore walls and much larger pore sizes, specific surface area and total pore volume. Besides, a gradual variation of morphologies with low curvature energy was obtained through adjusting the reaction condition. This is possibly due to the two-step dissociation of tartaric acid. The TA^2-, created by the second dissociation of tartaric acid, is regarded as a bridge-linker between the interface of the organic templates and the inorganic matrix. The more electric charge density of TA^2- improved the interface interaction, and thus, changed the shape and...