The Influence of Aspergillus niger Tiegh. on the Electrochemical Characterisation of a Polyaniline Modified Ni Electrode

Abstract

The strain L-10 of Aspergillus niger Tiegh. was cultivated on the malt extract agar (DIFCO OXOID). A polyaniline film was synthesized by potentiodynamic polymerization in an aqueous 0.3 M H2C2O4 solution containing 0.1 M aniline on the Ni electrode. Electrosynthesis gives cohesive films. The intensive growth of the treated microorganisms was observed on the polyaniline modified Ni surface. After 7 days of exposure the influence of A. niger L-10 on polyaniline was evaluated by 4.5 points. Optical and scanning electron microscopy were used to examine the morphology of polyaniline surface. Elemental analysis of polyaniline coatings was carried out using X-ray photoelectron spectroscopy. The electrochemical behaviour was determined in a 0.05 M H2SO4 solution by the cyclic voltammetry method. The presence of A. niger L-10 increases the electrochemical activity of polyaniline film.