A Sensitive and Green Method for Determination of Catechol Using Multi-Walled Carbon Nanotubes/Poly(1,5-diaminonaphthalene) Composite Film Modified Glassy Carbon Electrode

Abstract

A sensitive and selective electrochemical sensor for catechol (CC) using a multi-walled carbon nanotubes-poly(1,5diaminonaphthalene) composite modified glassy carbon electrode (MWCNTs/p-DAN/GCE) is reported. The surface features of the modified electrodes were characterized by a scanning electron microscope (SEM), and an energy-dispersive X-ray spectrometer (EDX). The electrochemical behavior was investigated using cyclic voltammetry (CV). The cyclic voltammogram of the modified electrode is characterized by a remarkable increase in the redox peak currents for CC, which indicates that MWCNTs/p-DAN film enhances significantly the electrocatalytic response toward CC. The effects of different parameters, such as pH, accumulation time, amount of MWCNTs, and scan rate on the response of the developed sensor were investigated. The analytical performances were also investigated using differential pulse voltammetry (DPV). The optimized MWCNTs/p-DAN/GCE based CC sensor exhibited a linear response over a range of 2.0 × 10 −8 to 1.3 × 10 −4 M with a lower limit of detection (LOD) of 1.0 × 10 −8 M (S/N = 3). Moreover, the developed CC sensor is characterized by high sensitivity, excellent repeatability, and excellent selectivity. The proposed sensor showed high selectivity for catechol relative to most potential interferents particularly hydroquinone (HQ) and resorcinol (RC), typical interfering agents. The developed sensor was successfully applied for the determination of CC in real water samples with satisfactory recovery results.

Supramolecular assemblies of carbon nanocoils and tetraphenylporphyrin derivatives for sensing of catechol and hydroquinone in aqueous solution

“…Hence the electron count (n) obtained for CC is 1.79 and for HQ it is 2.3 that approximates to 2. The two electron redox mechanisms of these two analytes is supported from literature as well 61 , 62 .…”

Poly(1,5-diaminonaphthalene)-Grafted Monolithic 3D Hierarchical Carbon as Highly Capacitive and Stable Supercapacitor Electrodes

“…In contrast, no structural alteration was observed in 1,5 PDAN (Figures S14b and S16). The significantly improved stability of 1,5 PDAN can be attributed to strong π–π interactions between the polymer and the carbon surface and within the polymer–a unique attribute of ladder polymers . Furthermore, the ladder structure of 1,5 PDAN should be less soluble in the electrolyte as opposed to the linear and less conjugated PANI …”

Green and cost-effective voltammetric assay for spiramycin based on activated glassy carbon electrode and its applications to urine and milk samples

“…The merits of electrochemical sensors created a remarkably increased attention to these techniques, as well as research in this area is growing over the past decades. 32 Even though, there are only two reports about electrochemical sensors for spiramycin. Unfortunately, both electrochemical sensors have limitations that may hinder their use in routine applications.…”