Voltammetric determination of catechol using a sonogel carbon electrode modified with nanostructured titanium dioxide.
In this study, we investigate highly efficient sonogel carbon electrode (SGC/TiO(2)) modified with nanostructured titanium dioxide synthesized via sol-gel method employing surfactant template for tailor-designing the structural properties of TiO(2). The stable SGC/TiO(2) electrode detects catechol, a neurotransmitter, in the presence of ascorbic acid, a common interferent, using cyclic voltammetry. A possible rationale for the stable catechol detection of SGC/TiO(2) electrode is attributed to most likely the adsorption of catechol onto highly porous TiO(2) (surface area of 147m(2)g(-1) and porosity of 46.2%), and the formation of C(6)H(4)(OTi)(2) bond between catechol and TiO(2). The catechol absorbed onto TiO(2) rapidly reaches the SGC surface, then is oxidized, involving two electrons (e(-)) and two protons (H(+)). As a result, the surface of TiO(2) acts as an electron-transfer accelerator between the SGC electrode and catechol. In addition to the quantitative and qualitative detection of catechol, the SGC/TiO(2) electrode developed here meets the profitable features of electrode including mechanical stability, physical rigidity, and enhanced catalytic properties.
Lunsford
Suzanne K
SK
Department of Chemistry, Wright State University, Dayton, OH 45435-0001, USA. suzanne.lunsford@wright.edu
Choi
Hyeok
H
Stinson
Jelynn
J
Yeary
Amber
A
Dionysiou
Dionysios D
DD