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

Abstract

Non-enzymatic electrochemical detection of catechol (CC) and hydroquinone (HQ), the xenobiotic pollutants, was carried out at the surface of novel carbon nanocoils/zinc-tetraphenylporphyrin (CNCs/Zn-TPP) nanocomposite supported on glassy carbon electrode. The synergistic effect of chemoresponsive activity of Zn-TPP and a large surface area and electron transfer ability of CNCs lead to efficient detection of CC and HQ. The nanocomposite was characterized by using FT-IR, UV/vis. spectrophotometer, SEM and energy dispersive X-ray spectroscopy (EDS). Cyclic voltammetry, differential pulse voltammetry (DPV) and electrochemical impedance spectroscopy were used for the electrochemical studies. CNCs/Zn-TPP/GCE nanosensor displayed a limit of detection (LOD), limit of quantification (LOQ) and sensitivity for catechol as 0.9 µM, 3.1 µM and 0.48 µA µM−1 cm−2, respectively in a concentration range of 25–1500 µM. Similarly, a linear trend in the concentration of hydroquinone detection was observed between 25 and 1500 µM with an LOD, LOQ and sensitivity of 1.5 µM, 5.1 µM and 0.35 µA µM−1 cm−2, respectively. DPV of binary mixture pictured well resolved peaks with anodic peak potential difference, ∆Epa(CC-HQ), of 110 mV showing efficient sensing of CC and HQ. The developed nanosensor exhibits stability for up to 30 days, better selectivity and good repeatability for eight measurements (4.5% for CC and 5.4% for HQ).

Construction of a Copper Bismuthate/Graphene Nanocomposite for Electrochemical Detection of Catechol

“…In prior studies, CT has been broadly used in the manufacturing of textiles, rubber, pharmaceuticals, and cosmetics . However, CT has been reviewed as a periodical environment contaminant and Group 2B human cancer-causing agent due to its less degradability in water . Thus, even at lower concentrations, it creates a threat to the well-being of humans and all other living organisms in the natural condition.…”

“…2 However, CT has been reviewed as a periodical environment contaminant and Group 2B human cancer-causing agent due to its less degradability in water. 3 Thus, even at lower concentrations, it creates a threat to the well-being of humans and all other living organisms in the natural condition. Gradually, people exposed to CT may have to face multiple health problems such as a rise in blood pressure and damage to the kidney, liver, lungs, DNA, and also the central nervous system.…”

Electrochemical Detection of Dihydroxybenzene Isomers at a Pencil Graphite Based Electrode

“…Unlike the conventional methods, electrochemical techniques are simple, interesting, easily movable, and broadly employed. 6 Moreover, DHBIs have similar chemical structures and characteristics; they have a tendency to coexist, and the redox potentials of HQ and CC are close beside one another and practically overlap at many electrodes. Therefore, it challenging to detect them by electrochemical techniques simultaneously.…”

“…Hence, diverse methods which have been brought into play so far for their simultaneous detection include chromatography, fluorescence, phosphorescence, chemiluminescence, pH-based flow injection analysis, capillary electrophoretic methods, solvent extraction techniques, electrochemical methods, etc. Unlike the conventional methods, electrochemical techniques are simple, interesting, easily movable, and broadly employed . Moreover, DHBIs have similar chemical structures and characteristics; they have a tendency to coexist, and the redox potentials of HQ and CC are close beside one another and practically overlap at many electrodes.…”

Electrochemical Deposition of Aggregated Cobalt Sulfophthalocyanines at Gold Surfaces in Alkaline Solutions

“…Supramolecular systems with electrochemically active fragments are considered the basis of the construction of artificial molecular devices and machines, increasing the attention of researchers. [1][2][3] At present, the chemistry of tetrapyrrole macroheterocyclic compounds is rapidly developing, since functional materials created on the basis of these compounds can successfully implement a set of applied functions. [4,5] Phthalocyanines (Pc) and their metal complexes (MPc) occupy a special place among the wide class of macroheterocyclic compounds.…”