Optical band gap studies of polypyrrole doped with niznfe2o4 nano particles

Polypyrrole/NiZnFe2O4 nanocomposites were synthesized by in-situ polymerization with Ammonium persulphate as an oxidising agent. Optical band gap of chemically synthesized polypyrrole and Polypyrrole-NiZnFe2O4 (10% - 50%) nanocomposites have been studied at room temperature and normal pressure. Energy band gap of these materials are determined by UV-VIS absorption spectra in the wavelength range 264 –1936 nm by spectrophotometer. In this work the experimental results obtained from the optical absorption spectra are reported for nanocomposites of different wt percentages (10% -50%). Characteristic peak around 800 nm (1.552eV) was observed in all the nanocomposites confirming the formation of polypyrrole. The optical properties of this conducting polymer make them a suitable candidate for optoelectronic devices.