Abstract

Yilkal Dessie, Shimelis Admassie

DOI : http://dx.doi.org/10.13005/ojc/290411

Electropolymerization and redox behavior of lignin composites were characterized by cyclic voltammetry (CV), electrochemical quartz crystal microbalance (EQCM), and Fourier transform infrared spectroscopy (FTIR). Oxidation of lignin (LG) composites mixed with different polymers such as; Poly (o-phenylenediamine) (POPDA), Pyrrole (Py), 4-amino-3-hydroxynaphthalene-sulfonic acid (AHNSA) on working glassy carbon electrode (GCE) were performed by cyclic voltammetry in a three-electrode electrochemical cell. EQCM was used during polymerization technique and detecting the continuous mass increase with the number of potential cycles. Transmission FTIR spectra of the electropolymerized film of pyrrole and lignin composite polymer after deposition were recorded. These results gave evidence of lignin composite formation due to the fact that new and broad bands in the region of 3411−3460 cm−1 were observed.

Lignin, Poly (o-phenylenediamine), Pyrrole, 4-amino-3-hydroxynaphthalene-sulfonic acid, Composite electrode; Electrosynthesis; Cyclic voltammetry; Electrochemical quartz crystal microbalance; Fourier transform infrared spectroscopy.

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