WO3/SBA-15 Synthesis and characterization

• Main Authors: Lin Yu-Ling, 林砡綾
• Other Authors: Shu Youn-Yuen
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/45173988803206388726

碩士 === 國立高雄師範大學 === 化學系 === 99 === The mesoporous molecular sieves SBA-15 has a large specific surface area, high porosity, narrowly distributed pore sizes and good mechanical stability, its structure is ordered hexagonal, it is very extensive to employ, have good results in catalyze and separate for and using. Develop in research in some recent, the scientists begin to introduce some metal oxides or metal materials with catalytic activity into SBA-15 in order to increase the catalytic activity of the material. The tungsten-containing mesoporous molecular sieve WO3/SBA-15 was prepared using conventional or microwave assisted impregnation method SBA-15 was prepared using tetraethyl orthosilicate as silicon source, and a mixture of P123 tri-block copolymer (EO20PO70EO20) as structure-directing agent. SBA-15 materials were characterized by thermogravimetric analysis (TGA)、x-ray diffraction (XRD)、fouries transform infrared spectroscopy (FT-IR)、nitrogen adsorption–desorption (BET) and transmission electron microscopy (TEM). The SBA-15 supported WO3 catalysts show uniform mesoporous structure, the surface area, total pore volume, and the pore size. That is a clear indication that the WO3 species are well dispersed in the framework of SBA-15 material with microwave assisted method can make distributing better.