Fabrication of Poly (Toluidine Blue O) functionalized multiwalled carbon nanotubes on glassy carbon electrode for hydrazine detection

Abstract

Herein, we present an amperometric sensor for hydrazine developed via simple potentiodynamic electrochemical polymerization of O-Toluidine Blue (pTBO) on functionalized multi walled carbon nanotubes (f-MWCNTs) coated glassy carbon electrode (GCE). The obtained of f-MWCNTs/pTBO composite was confirmed through FESEM, EDX and cyclic voltammetric studies. Relative to pTBO modified electrodes, f-MWCNTs/pTBO modified GCE displayed a well-defined electro-oxidation peak current response towards the detection of hydrazine. f-MWCNTs/pTBO/GCE exposes its good electrocatalytic ability in a wide linear range from 1 μM to 357 μM. Our modified electrode also possesses low limits of detection (0.24 μM) with high sensitivity (2492 μA mM-1 cm-2) value. The successful demonstration of feasible practicality of f-MWCNTs/pTBO composite modified GCE was performed in untreated rain, lake and tap water samples.