Synthesis and characterization of polyaniline films using Fenton reagent

Abstract

The chemical oxidation of aniline to form polyaniline (PANI) films and powder samples was made using Fenton reagent as an oxidizing agent in aqueous sulfuric acid medium. The PANI films were monitored by using the quartz crystal microbalance and the electronic absorption techniques. The optimum concentration was determined and the results were justified by measuring the UV-vis absorption spectra for the in situ PANI films. The conductivity for the PANI films and powder samples, prepared in different conditions, was measured. Also, the IR spectra, X-ray and the thermogravimetric analysis for the PANI powder formed in the bulk were measured and compared with the polymer prepared using ammonium peroxydisulfate. A preliminary investigation to the dielectric properties of the polymer powder was measured and discussed.

Self-doping of polyaniline prepared with the FeCl3/H2O2system and the origin of the Raman band of emeraldine salt at around 1375 cm−1

“…Catalytic processes giving water as a byproduct are thus more desirable. Polymerization of ANI has been accomplished with catalytic systems such as Cu 2+ /O 2 , Fe 3+ /O 3 , Fe 3+ /H 2 O 2 , Fe 2+ /solid complexes of H 2 O 2 or various peroxidase/H 2 O 2 systems …”

AC conductivity and dielectric spectroscopic studies of polypyrrole–titanium dioxide hybrid nanocomposites

“…In case of dielectrics with non‐zero conductivity, permittivity representation cannot explain the relaxation processes completely due to significant DC conductivity 40, 41. Electrical modulus representation is useful for such systems, which corresponds to the relaxation of the electric field in the material when the electric displacement remains constant 42.…”

Gas Sensors Based on Conducting Polymers

“…Conducting polymers have traditionally been synthesized either by chemical or electrochemical oxidation routes of the corresponding monomers with acid or peroxide initiators resulting in insulating materials that require a post-doping process [11,[18][19][20]. In both cases, the overall polymerization process includes the oxidation of monomer, followed by coupling reaction of the charged monomers to produce a polymer chain.…”