Sensitive determination of hydrazine using poly(phenolphthalein), Au nanoparticles and multiwalled carbon nanotubes modified glassy carbon electrode

Authors : Müge HATİP, Suleyman KOCAK, Zekerya DURSUN

Pages : 167-180

View : 30 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :This study reports a detailed analysis of an electrode material containing polyinsert ignore into journalissuearticles values(phenolphthalein);, carbon nanotubes and gold nanoparticles which shows superior catalytic effect towards to hydrazine oxidation in Britton-Robinson buffer insert ignore into journalissuearticles values(pH 10.0);. Glassy carbon electrode was modified by electropolymerization of phenolphthalein insert ignore into journalissuearticles values(PP); monomer insert ignore into journalissuearticles values(polyinsert ignore into journalissuearticles values(PP);/GCE); and the multiwalled carbon nanotubes insert ignore into journalissuearticles values(MWCNTs); was dropped on the surface. This modified surface was electrodeposited with gold nanoparticles insert ignore into journalissuearticles values(AuNPs/CNT/polyinsert ignore into journalissuearticles values(PP);/GCE);. The fabricated electrode was analysed the determination of hydrazine using cyclic voltammetry, linear sweep voltammetry and amperometry. The peak potential of hydrazine oxidation on bare GCE, polyinsert ignore into journalissuearticles values(PP);/GCE, CNT/GCE, CNT/polyinsert ignore into journalissuearticles values(PP);/GCE, and AuNPs/CNT/polyinsert ignore into journalissuearticles values(PP);/GCE were observed at 596 mV, 342 mV, 320 mV, 313 mV, and 27 mV, respectively. A shift in the overpotential to more negative direction and an enhancement in the peak current indicated that the AuNPs/CNT/polyinsert ignore into journalissuearticles values(PP);/GC electrode presented an efficient electrocatalytic activity toward oxidation of hydrazine. Modified electrodes were characterized with High-resolution transmission electron microscopy insert ignore into journalissuearticles values(HRTEM);, scanning electron microscopy insert ignore into journalissuearticles values(SEM);, X-ray photoelectron spectroscopy insert ignore into journalissuearticles values(XPS); and electrochemical impedance spectroscopy insert ignore into journalissuearticles values(EIS);. Amperometric current responses in the low hydrazine concentration range of 0.25-13 mu M at the AuNPs/CNT/polyinsert ignore into journalissuearticles values(PP);/GCE. The limit of detection insert ignore into journalissuearticles values(LOD); value was obtained to be 0.083 mu M. A modified electrode was applied to naturel samples for hydrazine determination.
Keywords : Gold nanoparticles, poly phenolphthalein, multiwalled carbon nanotube, hydrazine, voltammetry, amperometry