化学学报 ›› 2001, Vol. 59 ›› Issue (7): 1150-1152. 上一篇    下一篇

研究论文

MCM-48分子筛的高效合成途径

王树国;吴东;孙予罕;钟炳   

  1. 中国科学院山西煤炭化学研究所.太原(030001);煤转化国家重点实验室
  • 发布日期:2001-07-15

A high-yielding synthesis of MCM-48

Wang Shuguo;Wu Dong;Sun Yuhan;Zhong Bing   

  1. Shanxi Inst Coal Chem., CAS.Taiyuan(030001)
  • Published:2001-07-15

以正硅酸乙酯(TEOS)为硅源,十六烷基三甲基溴化铵(CTAB)为模板剂,用水热合成法合成MCM-48,在合成过程中通过降低pH值等方法可以使得MCM-48的产率显著提高,当pH=7时,产率达到97%。XRD和物理吸附表明合成的介孔分子筛具有高比表面积(BET,~1000m^2/g)和规整的孔道结构且孔径集中在2.6nm左右。

关键词: MCM-48, 有机硅化合物, 孔分布, 硅酸乙酯, 分子筛, 产率, 水热法

Using tetraethylorthosilicate (TEOS) as silica source and cethltrimethylammonium bromide (CTAB) as template, MCM-48 mesoporous molecular sieves were synthesized by hydrothermal methods. The yield of MCM-48 was pH-dependant, with lower pH leading to higher yields. At pH 7, the yield was as high as 97%.XRD and N2 adsorption- desorption isotherm were used to characterize the products. The MCM- 48 prepared this way showed high specific surface areas and ordered channel systems.

Key words: ORGANO SILICON COMPOUNDS, PORE SIZE DISTRIBUTION, MOLECULAR SIEVE, YELD, HYDRO-THERMAL METHOD

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