Voltammetric characterization of montmorillonite-based organo derivatives

Abstract

Organo derivatives of clay mineral montmorillonite were prepared by modification of montmorillonite (type SAz-1) with three alkylammonium cations – hexadecyltrimethylammonium (HDTM), benzyldimethylhexadecylammonium (BDH), and hexadecylpyridinium bromide (HDP). The prepared organo-montmorillonites were characterized by X-Ray diffraction and infrared spectroscopy to test the alkylammonium cations presence in the organo derivatives. Multisweep cyclic voltammetry of copper at carbon paste electrodes modified with the organo-montmorillonites used to study their sorption properties has proved the sorption decrease in comparison with the unmodified montmorillonite. The obtained results correlate with the study performed by means of sorption isotherms.