الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Ordered mesoporous materials raised a wide interest in the scientific community due to their unique structural properties which encompasses nanosized ordered channels and high surface areas (” ” ” ” " ~ " ” ” ” ”1000 m²/g). These materials have potential applications in diverse technological fields such as catalysis, membranes, microelectronics and sensors. The formation of these materials is initiated by the interaction of micelle of surfactant molecules with precursors of an inorganic oxide, usually sodium silicate, which further polymerizes to form solids with a well defined pore structure and amorphous walls.ةSulfated transition metal oxides such as sulfated zirconia (S-ZrO₂) as solid superacid have been received much attention due to their significant catalytic activities in hydrocarbon conversions such as esterification, isomerization, alkylation, etc. The remarkable catalytic activities for these sulfated transition metal oxides are mainly attributed to their properties as superacid. The generation and structures of Bronsted and Lewis acid sites are responsible for these activities. Unfortunately, the relatively small surface area for the sulfated transition metal oxides may limit their usefulness in catalytic activities. A direct impregnation method has been developed to explore the positive characteristic of both materials discussed above. The sulfated metal oxides continue manifest their remarkable catalytic activities while the high surface area of the mesoporous silica structure ensures a large number of acid sites.The first part of the work deals with the hydrothermal synthesis of mobile composite material (MCM-41) using the conventional structure-directing agent, cetyltrimethylammonium bromide, and used as a support for zirconium oxide. The second part focuses on synthesis of phosphorous-mesoporous silica (P-MCM-41) with helically ordered pores using a novel mixed surfactants (cetyltrimethylammonium chloride and cetytripheny phosphonium bromide) with different weight ratios in order to direct incorporate phosphorous species into MCM-41 species and used as a support for zirconium oxide. These materials were characterized by powder X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), nitrogen adsorption, Fourier transform infrared spectroscopy (FTIR), UV-Raman spectroscopy, ammonia temperature programmed desorption (NH, TPD) and thermogravimetric analysis.