Synthesis And Characterization Of New Porous Molecular Sieve Materials In Non-ionic Surfactant-oriented

Porous molecular sieves are of scientific and technological interests because of their tunable pore structures as well as tailored catalytic, sorption, conductive and magnetic properties. In order to trigger new applications of porous materials in the above areas and other nanotechnology, it is important to synthesize porous materials with different compositions, new pore systems, adjustable morphologies at micro-, meso-, and macro-scale and novel properties. In this thesis, we focused on the synthesis of mesoporous materials with different components, structures, morphologies and pore sizes by using nonionic surfactants as the structure-directing agents. Such materials obtained may have great theoretical and practical significance. This thesis is arranged as the following:In Chapter 2, the evaporation-induced self-assembly (EISA) process was developed to synthesize organic-inorganic hybrid mesoporous materials by using triblock copolymers as the structure-directing agents. Compared with aqueous solution synthetic methodology, the extent of hydrolysis and condensation of organosilanes was more effectively controlled in non-aqueous media such as ethanol solution, which resulted in the improvement of mesostructural quality of the final products. The preparations of periodic mesoporous organosilicas (PMO) with ethenyl moieties in the silica walls have been successfully carried out in ethanol media. Two PMOs with large pore sizes (> 4 nm) were obtained with 2D hexagonal and 3D cubic structures, by using triblock copolymer P123 and F108 as structure-directing agents, respectively. In addition, using this method, cubic large pore PMO materials with different morphologies such as films, monoliths and fibers have been rapidly and easily prepared. Furthermore, by utilizing solvothermal post-treatment method, ordered 3D bicontinuous gyroidal PMO with large pore sizes (>6 nm) have been synthesized via an EISA procedure by using triblock copolymer PI23 as a structure-directing agent. The resulted PMO has a large pore size of 6.28 nm, a BET surface area of 605 m~2/g and a pore volume of 0.78 cm~3/g, and shows unique adsorption properties to norfloxacin when used in antibiotic charging experiments.In Chapter 3, we reported the syntheses of novel mesoporous silica materials via an EISA procedure by using organic acid instead of inorganic acid as the acid media. When tartaric acid was used as the acid media, hierarchical meso-macroporous structure of silica materials with wormhole-like mesoporous walls and a novel...