Effect of TiO2 Rutile Additive on Electrical Properties of PPyTiO2 Nanocomposite

Abstract EN

Polypyrrole/titanium dioxide nanocomposite (PPy/TiO2) was synthesized by in situ chemical polymerization of pyrrole (Py) monomer in colloidal suspension of TiO2 rutile.

TEM and SEM images show that the TiO2 is covered by PPy forming a core-shell structure.

The PPy/TiO2 core-shell will create n - p junction and bring in an inversion layer on the PPy-shell surface.

The feature is accounted for the modification in electrical properties of the PPy/TiO2 nanocomposite.

On the exposure to oxygen the conductivity of the nanocomposite exhibits an increase in 16–18-folds that are accounted for the interaction between oxygen (an electron acceptor) and the inversion layer.

The cyclic voltammetry diagrams have shown that at around 15% TiO2 and scan rate 100 mV/s the nanocomposites can reach a specific capacitance about 176 F/g.