不同方法合成铈掺杂介孔分子筛的结构性能

Textural Property of Ce–Incorporated Mesoporous Molecular Sieve Synthesized Via Different Methods

以硅酸钠、硝酸铈铵为原料,十六烷基三甲基溴化铵为模板剂,分别在微波辐射和水热条件下,合成稀土元素铈掺杂的介孔分子筛(CeMCM-41)。采用X射线粉末衍射(XRD)、透射电子显微镜(TEM)、紫外–可见分光光度计(UV–vis)和N2吸附-脱附等技术对合成的样品进行表征,研究了2种不同方法合成的CeMCM-41的介孔有序性和结构性能。结果表明:在2种不同的合成条件下,成功合成出铈掺杂的MCM-41介孔分子筛,其比表面积高于800 m2/g。合成条件影响着所合成的介孔材料的结构性能。

Using sodium silicate and ammonium cerium（IV） nitrate as raw materials,cetyltrimethyl ammonium bromide（CTAB） as a template,the rare earth element cerium incorporated MCM-41 mesoporous molecular sieves（CeMCM-41） were synthesized under microwave irradiation or hydrothermal condition.The obtained CeMCM-41 materials were characterized by various physicochemical techniques,such as X–ray diffraction（XRD）,transmission electron microscopy（TEM）,ultraviolet–visible spectrophotometer（UV–Vis） technique and N2 physical adsorption,respectively.The experimental results show that the CeMCM-41 mesoporous molecular sieves can successfully be synthesized under the two different synthesis conditions,respectively.The specific surface area of obtained products is over 800 m2/g,synthesis conditions have signal effects on textural property of synthesized mesoporous molecular sieve.