双模板剂合成Zr-MCM-41的结构表征及催化性能

Synthesis, characterization and catalytic performances of Zr-Si mesoporous molecular sieves using two surfactants as cotemplate

以十二烷基硫酸钠(SDS)和辛基酚聚氧乙烯醚(TX-100)为模板剂,正硅酸乙酯(TEOS)为硅源,乙二胺为碱性介质,当n(TEOS)∶n∶n(SDS)∶n∶n=1∶0.008∶0.10∶0.05∶2.2∶120合成Zr-MCM-41介孔分子筛,通过XRD、N2吸附脱附、NH3-TPD等方法对分子筛的晶体结构和表面物性进行了研究。结果表明,合成的分子筛具有典型的六方介孔结构特征,孔径分布较窄,具有较大的比表面积和较强的酸性,在乙氧基化催化反应中具有较高的催化活性。(Z(rNO3)4)(H2NCH2CH2NH2)(H2O)

Mesoporous silica molecular sieves containing iron was synthesized under hydrothermal conditions using sodium dodecyl sulfate （SDS） and octyl phenolpolyoxyethylene ether（TX-100） surfactants as co-template and ethyl silicate（TEOS） as silica source in ethylenediamine . The optimum processing properties were n（TEOS）：n（Zr（NO3）4）：n（SDS）：n（H2NCH2CH2NH2）：n（H2O） =1：0.008：0.10：0.05：2.2：120.Zr-Si mesoporous molecular sieve was characterized using several techniques, e.g. powder X-ray diffraction （XRD）, N2-adsorption-desorption and NH3 adsorption-desorption （NH3-TPD）. XRD and. N2-adsorption-desorption studies indicated that the calcined materials had the standard hexagonal structure and highly specific surface area. NH3-TPD indicated that the all samples that have been prepared are surface strong acid sites. Catalytic Performances of Zr-MCM-41 with a hexagonal structure in oxyethylation of fatty alcohol were experimental investigated. The results showed aluminium-based dodecyl sulfate mesophase exhibited highly catalytic activity for oxyethylation of octanol