Immobilization of amino acid-peroxopolyoxotungstate hybrid material onto the nanolayers of montmorillonite

In this study, Gly-peroxopolyoxotungstate–montmorillonite nanocomposite was prepared by pre-modifyingmontmorillonite using glycine, then reaction of the prepared organoclay with peroxopolyoxotungstate. In the resultednanocomposite the glycinium cations bound electrostatically to peroxopolyoxotungstate anions to give(Gly)3{PO4[WO(O2)2]4}. So, the prepared nanocomposite intercalated the (Gly)3{PO4[WO(O2)2]4} molecules. Theresultant (Gly)3{PO4[WO(O2)2]4}–montmorillonite nanocomposite was characterized using FT-IR spectroscopy, X-raydiffraction (XRD) and thermogravimetric analysis (TGA). X-ray diffraction pattern showed the increase in basal spacingdue to intercalation of (Gly)3{PO4[WO(O2)2]4} which is in good agreement with simple predictions based on vanderWaals volume of the (Gly)3{PO4[WO(O2)2]4}. TGA characterization and analysis show stepwise decompositioncorresponding to initial weight loss from residual water desorption, followed by decomposition of the glycinium cations.

کلیدواژه ها:

peroxopolyoxotungstate ، montmorillonite ، glycine ، immobilization