双模板剂合成铁硅介孔分子筛的结构表征  

Synthesis, characterization of Fe-Si mesoporous molecular sieves using two surfactants as co-template

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作  者:宋伟明[1] 邓启刚[1] 何承雨[2] 周东颜[2] 

机构地区:[1]齐齐哈尔大学化学化工学院,齐齐哈尔161000 [2]齐齐哈尔大学

出  处:《齐齐哈尔大学学报(自然科学版)》2005年第4期10-13,共4页Journal of Qiqihar University(Natural Science Edition)

摘  要: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(Fe(NO3)3):n(SDS):n(H2NCH2CH2NH2):n(H2O)=1:0.008:0.10:0.05:2.2:120合成Fe-Si 介孔分子筛通过XRD、IR、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。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(Fe ( NO3 ) 3): n ( SDS ): n ( H2NCH2CH2NH2 ): n ( H2O ) =1 : 0.008:0.10:0.05:2.2:120.Fe-Si mesoporous molecular sieve was characterized using several techniques, e.g. powder X-ray diffraction (XRD), N2-adsorption-desorption, Fourier transform-infra red spectroscopy (FT-IR) 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 and TG-DTA spectra indicated that the all samples that have been prepared are surface strong acid sites and high thermal stability.

关 键 词:Fe—Si介孔分子筛 合成 双模板剂 结构表征 

分 类 号:O643[理学—物理化学] TQ423[理学—化学]

 

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