Electrooxidation of dopamine at N-(1,3-dimethylbutyl)-N'-phenyl-p- phenylenediamine/multiwalled carbon nanotubes nanocomposite-modified electrode

Abstract

A nanocomposite-modified electrode has been prepared by functionalizing multiwalled carbon nanotubes (MWCNTs) with N-(1,3-dimethylbutyl)-N′- phenyl-p-phenylenediamine (p-PDA). The physical characterization o. The prepared composite has been done using infrared spectroscopy and ultraviolet-visible spectroscopy. The morphologies o. The prepared p-PDA/MWCNTs/ionophore film have been characterized using scanning electron microscopy and transmission electron microscopy. The electrochemical studies o. The prepared composite electrode have been investigated by cyclic voltammetry technique. We observed tha. The p-PDA/MWCNTs/ionomer composite has better electrochemistry, film adhesion with homogeneous dispersion a. The electrode surface and an electrocatalytic activity towar. The oxidation of dopamine (DA) in 0.1 M phosphate buffer solution (pH 7.0) at a potential of 50 mV. The linear range and detection limit fo. The detection of DA was found to be 62-625 and 5 ÂM respectively. The modified electrode also exhibited several attractive features such as simple preparation, fast response, good stability and repeatability. © 2013 Materials Research Society.