Electrochemical grafting of poly(2,5-dimethoxy aniline) onto multiwalled carbon nanotubes nanocomposite modified electrode and electrocatalytic oxidation of ascorbic acid

Abstract

A modified electrode was fabricated by grafting poly(2,5-dimethoxyaniline) (PDMA) onto multiwalled carbon nanotubes (MWNTs) and used for the electrocatalytic oxidation of ascorbic acid (AA). Cyclic voltammetry was used to fabricate the modified electrode and demonstrate the electroactivity of MWNT-g-PDMA-ME towards AA. Field emission scanning electron microscopy (FESEM) of MWNT-g-PDMA-ME revealed the combined presence of MWNT and PDMA. The MWNT-g-PDMA-ME exhibited excellent performance for AA at 320 mV with a high sensitivity (12.78 µA/mM) and linear concentration range of 1 to 5 mM (correlation coefficient of 0.9991). Differential pulse voltammetry (DPVs) showed that MWNT-g-PDMA-ME experiences negligible interference from other electro-active components.

Carbon Nanotube-Conducting Polymer Composites as Electrode Material in Electroanalytical Applications

“…The homogeneous existence of both components in composite films provides high catalytic activity and sensitivity [39]. CNT-CP/E is Carbon Nanotubes -Current Progress of their Polymer Composites generally prepared by the immersion of bulk electrode into the supporting electrolyte containing both CNT and monomer, which is attached to the electrode surface by CV [40][41][42][43][44][45] or chronoamperometry [46]. CNT-CP electrodes that contain PPy as CP were prepared by applying eight potential cycles from −0.2 to 0.8 V at 0.1 V s −1 scan rate in 0.1 M PPy+0.2 mg/mL SWCNTs+0.1 M SDS solution [47].…”