ELECTROCHEMICAL SENSOR OF PANi-CNTs COMBINED WITH NiO FOR RAPID ANALYSIS OF METHANOL IN WATER

Abstract

Rapid analysis of methanol content in food, especially alcoholic beverages, is currently gaining many attentions. In this study, the Fluorine-doped tin oxide (FTO) electrode which was modified with nanocomposite of polyaniline-carbon nanotubes (PANi-CNTs) and electrochemically functionalized with NiO catalyst was employed to detect methanol in aqueous environment. The morphology and structure of as-prepared material were analyzed using FESEM, FTIR, and Raman techniques. The results showed that the FTO/PANi-CNTs/NiO electrode has good catalytic activity with methanol in alkaline environment. The sensor has a linear range of 200 to 500 mM, detection limit of 10 mM (S/N =3), sensitivity of 0.0004 mA.mM-1.cm-2, and high selectivity with methanol.