Synthesis and Application of Polyaniline/Multi Walled Carbon Nanotube Nanocomposite for Electrochemical Determination of Folic acid

Composite of polyaniline with multi-wall-carbon nanotubes (pani/mwcnts)was synthesized by an in situ chemical oxidative polymerization method. the pani weresynthesized chemically using aniline as the monomer and ammonium peroxydisulfate as theoxidant. the pani/mwcnts were characterized physically using scanning electronmicroscopy (sem) and transmission electron microscopy (tem) .with this nano compositeas the modifier, a voltammetric sensor for folic acid (fa) was constructed on a glassy carbonelectrode (gce). folic acid undergoes a 2e-/2h+ transfer electrochemical reduction process at0.7 v with respect to ag/agcl reference electrode in ph 7. pani/mwcnts modifiedelectrode showed good cyclic voltammetric (cv) response in wide linear range from 10-6 mto 10-4 m. this modified showed excellent sensitivity and stability for determination of folicacid. the response mechanism of folic acid at pani-mwcnts/gce was discussed in detail.