Surface Modification of Porous Silica with Bi-thiophene Tripodal Ligand and Aplication to Adsorption of Toxic Metal Cations

The immobilization of a thiophene-based tripodal ligand, with a donor sulfur, on the surface of an epoxide group containing a silica gel phase for the synthesis of a newly functionalized material based on porous silica-bound bi-thiophene tripodal ligand (SGBT) is described. The modified silica surfa...

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Bibliographic Details
Published in:Phosphorus, sulfur, and silicon and the related elements sulfur, and silicon and the related elements, 2009-12, Vol.185 (1), p.232-241
Main Authors: Radi, Smaail, Attayibat, Ahmed, Ramdani, Abdelkrim, Bacquet, Maryse
Format: Article
Language:English
Subjects:
Adsorption
chemical synthesis
metals
silica modification
thiophene
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Summary:The immobilization of a thiophene-based tripodal ligand, with a donor sulfur, on the surface of an epoxide group containing a silica gel phase for the synthesis of a newly functionalized material based on porous silica-bound bi-thiophene tripodal ligand (SGBT) is described. The modified silica surface was characterized by 13 C NMR of a solid sample, elemental analysis, and infrared spectra. This new material was also studied and evaluated by determination of the surface area using the BET equation, the adsorption and desorption capability using the isotherm of nitrogen and BJH pore sizes, respectively. The target material exhibits good thermal stability as determined by thermogravimetry curves. The synthesized material was utilized in column and batch methods for adsorption of Hg 2+ , Cd 2+ , Pb 2+ , Cu 2+ , Zn 2+ , K + , Na + , and Li + , and the material exhibits an affinity only towards toxic heavy metals.
ISSN:1042-6507
1563-5325
DOI:10.1080/10426500902758469