摘要
A SBA-16-type mesoporous silica material was synthesized under a moderately acidic condition of 0.5 mol·L -1 HCl solution.These mesoporous materials were characterized with X-ray diffraction(XRD)pattern,scanning electron microscopy(SEM),transmission electron microscopy(TEM),and nitrogen adsorption-desorption measurements.The three-dimensional microporosity of the prepared mesoporous silica having ordered hexagonal mesoporous structure was evidenced by the well-defined XRD patterns combined with TEM photographs.SEM observation showed a highly ordered cubic crystal structure for the prepared mesoporous silica.The size of these crystallites was maintained within the range of 4—6 μm,which is fairly important for the application to the stationary phase for separation.The nitrogen adsorption-desorption analysis revealed that the prepared mesoporous silica possessed a small pore diameter of 3.68 nm,a total surface area of 363.65 m2·g -1 ,a total pore volume of 0.38 cm3·g -1 ,and a pore-wall thickness of 6.63 nm.These features may lead to higher thermal and hydrothermal stability,excellent microporosity,and good connectivity.The mesoporous silica prepared in this study exhibited potential applications to catalysis,sensoring,and separation.
A SBA-16-type mesoporous silica material was synthesized under a moderately acidic condition of 0.5 mol· L^-1 HCl solution. These mesoporous materials were characterized with X-ray diffraction （XRD） pattern, scanning electron microscopy （SEM）, transmission electron microscopy （TEM）, and nitrogen adsorption-desorption measurements. The three-dimensional microporosity of the prepared mesoporous silica having ordered hexagonal mesoporous structure was evidenced by the well-defined XRD patterns combined with TEM photographs. SEM observation showed a highly ordered cubic crystal structure for the prepared mesoporous silica. The size of these crystallites was maintained within the range of 4-6 μm, which is fairly important for the application to the stationary phase for separation. The nitrogen adsorptiondesorption analysis revealed that the prepared mesoporous silica possessed a small pore diameter of 3.68 nm, a total surface area of 363.65 m^2 · g^-1, a total pore volume of 0.38 cm^3 · g^-1, and a pore-wall thickness of 6.63 nm. These features may lead to higher thermal and hydrothermal stability, excellent microporosity, and good connectivity. The mesoporous silica prepared in this study exhibited potential applications to catalysis, sensoring, and separation.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2006年第6期1486-1489,共4页
CIESC Journal
基金
国家自然科学基金项目(50573006).~~
