3-Aminopropyltrimethoxysilane Functionalized Mesoporous Materials and Uptake of Metal Ions

被引:0
|
作者
Alothman, Zeid A. [1 ]
Apblett, Allen W. [2 ]
机构
[1] King Saud Univ, Coll Sci, Dept Chem, Riyadh 11451, Saudi Arabia
[2] Oklahoma State Univ, Dept Chem, Stillwater, OK 74078 USA
关键词
Mesoporous silica; Tetraethylorthosilicate; gamma-Aminopropyl; Metal ions; NMR; MOLECULAR-SIEVES; HEAVY-METALS; SILICA; REMOVAL; WATER; ADSORPTION; ADSORBENTS; SILYLATION; MONOLAYERS; SEPARATION;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
gamma-Aminopropyl-functionalized mesoporous materials were synthesized by chemical modifcation of a HCl-ethanol washed mesoporous silica (OSU-6-W) with 3-aminopropyltri-methoxysilane (APTMS). The synthesized inorganic-organic hybrids were characterized by solid state Si-29 NMR spectroscopy, a titration method and elemental analysis of the modified samples. The average numbers of pendant groups were found to be 2.47 and 4.71 groups/nm(2). Surface area analysis showed that these materials have channel diameters of 43.6 and, 36.2 angstrom and surface areas of 1023 and 709 m(2)/g. Infrared spectroscopy, solid state NMR for C-13 and Si-29 nuclei and X-ray diffraction patterns are in agreement with the success of the preparation of organically-modified mesoporous silicas. Adsorption experiments of Cu2+, Zn2+ and Cd2+ shows a remarkably high adsorption capacities with an increase in the surface density of amino groups and affected by the ' pH of the medium, surface areas and pore sizes.
引用
收藏
页码:541 / 546
页数:6
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