Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid

Dalibor M Stanković; Miloš Ognjanović; Fabian Martin; Ľubomir Švorc; José F M L Mariano; Bratislav Antić

doi:10.1016/j.ab.2017.10.018

Design of titanium nitride- and wolfram carbide-doped RGO/GC electrodes for determination of gallic acid

Anal Biochem. 2017 Dec 15:539:104-112. doi: 10.1016/j.ab.2017.10.018. Epub 2017 Oct 24.

Authors

Dalibor M Stanković¹, Miloš Ognjanović², Fabian Martin³, Ľubomir Švorc⁴, José F M L Mariano⁵, Bratislav Antić²

Affiliations

¹ The Vinča Institute of Nuclear Sciences, University of Belgrade, POB 522, 11001 Belgrade, Serbia; Department of Analytical Chemistry, Innovation Center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade, 11000, Serbia. Electronic address: dalibors@chem.bg.ac.rs.
² The Vinča Institute of Nuclear Sciences, University of Belgrade, POB 522, 11001 Belgrade, Serbia.
³ The Vinča Institute of Nuclear Sciences, University of Belgrade, POB 522, 11001 Belgrade, Serbia; Institute of Geotechnics, Slovak Academy of Sciences, Watsonova 45, 04001, Košice, Slovak Republic.
⁴ Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, Bratislava, SK-812 37, Slovak Republic.
⁵ Department of Physics and CeFEMA, Faculty of Science and Technology, University of Algarve, Campus de Gambelas, Faro 8005-139, Portugal.

PMID: 29074398
DOI: 10.1016/j.ab.2017.10.018

Abstract

In the present paper, the electrochemical behavior and the properties of two modified glassy carbon (GC) electrodes used for quantification of gallic acid in sweet wines were compared. A comparative study was conducted between titanium nitride- or wolfram carbide-doped reduced graphene oxide, labeled as TNrGO and WCrGO, respectively, modified GC electrodes, which are promising composite nanomaterials for electroanalytical applications. For the first time, WCrGO was synthesized and its electroanalytical properties compared with those of TNrGO. Results showed that the proposed materials exhibited enhanced characteristics, e.g., low limits of detection (1.1 μM and 3.1 μM for TNrGO and WCrGO, respectively), wide linear ranges (for TNrGO 4.5-76 μM and for WCrGO 10-100 μM), low adsorption, and low background current, which make them promising candidates for electrochemical sensing applications.

Keywords: Electroanalytical method; Modified electrodes; Nanoparticles; Reduced graphene oxide; Wine samples.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Carbon / chemistry
Electrochemical Techniques / methods*
Electrodes
Gallic Acid / analysis*
Graphite / chemistry*
Hydrogen-Ion Concentration
Limit of Detection
Nanostructures / chemistry
Oxides / chemistry
Titanium / chemistry*
Tungsten Compounds / chemistry*

Substances

Oxides
Tungsten Compounds
tungsten carbide
Gallic Acid
titanium nitride
Carbon
Graphite
Titanium