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

Abstract

This study reports a detailed analysis of an electrode material containing poly(phenolphthalein), carbon nanotubes and gold nanoparticles which shows superior catalytic effect towards to hydrazine oxidation in Britton–Robinson buffer (pH 10.0). Glassy carbon electrode was modified by electropolymerization of phenolphthalein (PP) monomer (poly(PP)/GCE) and the multiwalled carbon nanotubes (MWCNTs) was dropped on the surface. This modified surface was electrodeposited with gold nanoparticles (AuNPs/CNT/poly(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, poly(PP)/GCE, CNT/GCE, CNT/poly(PP)/GCE, and AuNPs/CNT/poly(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/poly(PP)/GC electrode presented an efficient electrocatalytic activity toward oxidation of hydrazine. Modified electrodes were characterized with High-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and electrochemical impedance spectroscopy (EIS). Amperometric current responses in the low hydrazine concentration range of 0.25–13 µM at the AuNPs/CNT/poly(PP)/GCE. The limit of detection (LOD) value was obtained to be 0.083 µM. A modified electrode was applied to naturel samples for hydrazine determination.

Simultaneous electrochemical determination of hydrazine and nitrite based on Au nanoparticles decorated on the poly(Nile Blue) modified carbon nanotube

“…Au4f7/2 and 4f5/2 show a maximum of 84.05 and 87.58 eV, respectively, and the BE difference between the two peaks is 3.6 eV. This value also supports the literature showing that Au has zero valence [33, 34].…”

“…A homogeneously dispersed suspension is obtained by keeping it ultrasonic. 10 μL of black colored CNT suspension was dropped onto the GCE and dried under an infrared lamp (IR 150 W) [32,33].…”

Molecularly imprinted electrochemical aptasensor based on functionalized graphene and nitrogen-doped carbon quantum dots for trace cortisol assay

“…In order to enhance the performance of sensors, a variety of nanomaterials such as graphene, 18,19 carbon nanotubes, 20,21 carbon quantum dots 22 and metal nanoparticles 23 have been used as modification materials because of their high surface area and extraordinary physical, chemical and electronic properties. Graphene is a 2D carbon nanomaterial that shows the advantages of good electrical conductivity, large specific surface area and high mechanical strength.…”

An effective ultra‐performance liquid chromatography and derivatization method for the quantification of potential genotoxic impurity Hydrazine in Gliclazide and its formulation – Robustness study by the design of experiments

“…A detailed literature survey indicates HNE can be directly estimated in the raw materials and water samples using various hyphenated analytical techniques such as LC‐MS [16, 17], GC‐MS [18], the voltammetric method using glassy carbon electrode [19], UHPLC‐fluorescence [20] and spectrophotometric determination [21]. Due to the non‐chromophore nature of the HNE, it is to be derivatized with a suitable carbonyl compound to form a corresponding HNE derivative.…”