Synthesis, characterization and analytical applications of titanium(IV) molybdosilicate: A cation ion-exchanger

摘要

A new inorganic cation exchanger titanium(IV) molybdosilicate has been synthesized. The effect of experimental parameters such as mixing ratio of reagents, temperature, and pH on the properties of material has been studied. The material was characterized on the basis of chemical composition, thermal and chemical stability, X-ray diffraction, FTIR, TGA and SEM studies. The exchanger behaves as a monofunctional acid in alkali systems and bifunctional in alkaline earth system. The cation exchange capacity for Na+ was found to be 0.74 mequiv./g ions. The adsorption behavior of metal ions in different solvent systems namely acetic acid, formic acid, dimethylsulfoxide, phenol, triton, formamide and dimineralized water has been studied. The analytical applications of the material have been explored by achieving some binary as well as ternary separations from aqueous solution on its columns. In order to demonstrate analytical utility of titanium(IV) molybdosilicate, quantitative separation of Fe3+ and Zn2+ contents of a commercially available pharmaceutical sample viz Fefol-Z has been performed on its column. (C) 2007 Elsevier B.V. All rights reserved.