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2011•Journal of Xinyang Normal UniversityRequires access

Detection of Catechol by TiO_2-graphene-modified Glassy Carbon Electrode

Liyuan Zhang

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Abstract

A novel TiO2-graphene-modified glassy carbon electrode(TiO2-Gr/GCE) was fabricated.The electrochemical behaviors of catechol at the modified electrode were studied by cyclic voltammetry(CV) and differential pulse voltammetry(DPV).In pH 6.0 phosphate buffer solution(PBS),the composite film showed excellent electrocatalytic activity for the redox of catechol.The results of DPV indicated that the oxidation peak currents was linear with catechol concentrations in the range of 1.0 × 10-6 mol/L to 1.0 × 10-5 mol/L.The detection limit of catechol is 1.0 × 10-7 mol/L(S/N=3).This modified GCE showed good sensitivity and selectivity and reproducibility.

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What this paper is about

A novel TiO2-graphene-modified glassy carbon electrode(TiO2-Gr/GCE) was fabricated.The electrochemical behaviors of catechol at the modified electrode were studied by cyclic voltammetry(CV) and differential pulse voltammetry(DPV).In pH 6.0 phosphate buffer solution(PBS),the composite film showed excellent electrocatalytic activity for the redox of catechol.The results of DPV indicated that the oxidation peak currents was linear with catechol concentrations in the range of 1.0 × 10-6 mol/L to 1.0 × 10-5 mol/L.The detection limit of catechol is 1.0 × 10-7 mol/L(S/N=3).This modified GCE showed good sensitivity and selectivity and reproducibility.

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Available abstract

A novel TiO2-graphene-modified glassy carbon electrode(TiO2-Gr/GCE) was fabricated.The electrochemical behaviors of catechol at the modified electrode were studied by cyclic voltammetry(CV) and differential pulse voltammetry(DPV).In pH 6.0 phosphate buffer solution(PBS),the composite film showed excellent electrocatalytic activity for the redox of catechol.The results of DPV indicated that the oxidation peak currents was linear with catechol concentrations in the range of 1.0 × 10-6 mol/L to 1.0 × 10-5 mol/L.The detection limit of catechol is 1.0 × 10-7 mol/L(S/N=3).This modified GCE showed good sensitivity and selectivity and reproducibility.

Key concepts: Catechol, Differential pulse voltammetry, Cyclic voltammetry, Detection limit, Graphene, Electrode, Electrochemistry, Redox

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Detection of Catechol by TiO_2-graphene-modified Glassy Carbon Electrode — Research Paper | ScholarLens