| 摘要 |
<p>Provided are a method for preparing mesoporous silica and mesoporous silica obtained therefrom. The method for preparing mesoporous silica according to the present invention comprises the following steps: a) providing a mixture of a surfactant and 0.5-0.9N HCl; b) preparing silica gel by adding water glass (sodium silicate) to the mixture of the previous step at a temperature of 30-50 °C, with stirring until pH value of 5-7 is obtained; c) removing impurities from the resulted silica gel by washing it with distilled water and filtration; d) drying the resulted silica gel with a microwave heating device; and e) firing the dried silica gel at a temperature of 400 °C or more. Since thus prepared mesoporous silica powder has a specific surface area of 700-900m<SUP>2</SUP>/g, it can be used as a possible substitute for other porous materials such as activated carbon. Further, owing to its stability at a very high temperature condition such as above 1000 °C, it can be effectively used in various high technology industries as heat insulators for a high temperature use, adsorbents for a high temperature use, catalysts or the like. Since the method of the present invention uses inexpensive water glass as a starting material, it is possible to provide mesoporous silica particles in an economical and efficient way.</p> |
