HANG Zhenrong 1, WAN Long 1, WEI Kun 2, SHI Qi 3, TANG Shaoqiu 1
(1. College of Materials Science and Engineering, Hunan University, Changsha 410082; 2. College of Materials Science and Technology, South China University of Technology, Guangzhou 510641; 3. School of Material Science and Engineering，Jingdezhen Ceramic Institute，333001)
Abstract:Ceria and alumina doped into silica microporous materials were synthesized by in- situ incorporation, using dodecylamine as template. The structures and surface adsorption properties of the s ample were investigated by means of XRD, TEM, nitrogen isothermal adsorption and TG- DSC analysis, etc. The results of XRD show that the calcined s ample has a single diffraction peak at 2θto 2.9° and the corresponding interplanar spacing is 3.05nm. The order of silica decreas ed evidently when aluminum and cerium were doped into the framework. The s ample prepared exhibits high hydrothermal stability, and its microporous structure could be maintained after hydrothermal treatment for 48 hours in boiling water. The monolithic particles with spherical shape could be obs erved by TEM image. Nitrogen adsorption isotherm plot of the sample recorded belongs to LangmuirⅠwith specific surface area of 570.3m2/g.
Keywords: micropore, surface adsorption property, hydrothermal stability, characterization