COMPARISON OF THE PHYSICAL-PROPERTIES OF POLYPYRROLE PRODUCED BY ANODIC-OXIDATION AND BY PHOTOELECTROCHEMICAL ACTIVATION OF TIO2

The conductivity, morphology, and thermal stability of polypyrrole films generated by electrochemical oxidation on stainless steel and by photocatalytic activation on TiO2 are compared. For the electrochemically produced films, these properties are dependent on the electrolyte anion in the presence of which the film was produced. Conductivity and morphology of the anodic films were interdependent. In contrast, the conductivity and morphology of photoelectrochemically deposited polypyrrole appeared to be less sensitive to electrolyte and showed a significantly lower anion incorporation within the film. The resulting semiconductor-conducting polymer composite was less conducting and thermally less stable than an electrochemically generated polypyrrole film.