物理化学学报 >> 2004, Vol. 20 >> Issue (01): 81-84.doi: 10.3866/PKU.WHXB20040117

研究简报 上一篇    下一篇

硅酸钠与有机硅氧烷前驱体自组装杂化硅基中孔材料

喻宁亚;巩雁军;吴东;孙予罕;罗晴;刘午阳;邓风   

  1. 中国科学院山西煤炭化学研究所,煤转化国家重点实验室,太原 030001;
  • 收稿日期:2003-06-19 修回日期:2003-08-19 发布日期:2004-01-15
  • 通讯作者: 孙予罕 E-mail:yhsun@sxicc.ac.cn

Organic-Inorganic Hybrid Mesoporous Materials Assembled from Sodium Silicate and Organotrialkoxysilane

Yu Ning-Ya;Gong Yan-Jun;Wu Dong;Sun Yu-Han; Luo Qing;Liu Wu-Yang;Deng Feng   

  1. State Key Laboratory of Coal Conversion, Shanxi Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001; State Key Laboratory of Magnetic Resonance and Atomic Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
  • Received:2003-06-19 Revised:2003-08-19 Published:2004-01-15
  • Contact: Sun Yu-Han E-mail:yhsun@sxicc.ac.cn

摘要: 采用有机硅氧烷(RTES)与硅酸钠(Na2SiO3)共水解缩聚合成有机官能化的MSU型硅基中孔材料.考察了合成体系pH值对材料织构性能的影响以及不同有机硅氧烷与硅酸钠在中性条件下的自组装行为.发现在中性条件下,加入NaF可以有效避免带有较小有机基团的有机硅氧烷进入材料孔壁的可能性,而且合成体系的pH值对材料的孔径有一定的调控作用.

关键词: 有机官能化, MSU型中孔分布筛, 硅酸钠

Abstract: The MSU-typed mesoporous organosilica with organic methyl, vinyl, and phenyl functionals were prepared by using inexpensive sodium silicate and organotrialkoxysilane as the silica precursor and nonionic polyethyleneoxide AEO9[C11-15H23-31(CH2CH2O)9H] as the structure-directing agent. The resultant materials were characterized by powder X-ray diffraction (XRD), N2 sorptometry, high resolution transmission electron microscopy (HRTEM) and 29Si CP MAS-NMR. The results indicated that addition of sodium fluorite reduced the possibility of organotrialkoxysilane with small organic group entering the framework walls of the mesostructures at neutral condition. Moreover, pore diameter of material increased upon the increase of pH value.

Key words: Organic functionalization, MSU mesoporous molecular sieves, Sodium silicate