The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing.

Chikere, Chrys O.; Faisal, Nadimul Haque; Kong Thoo Lin, Paul; Fernandez, Carlos

Abstract

For the first time, the synergistic effect of graphene oxide nanocolloids (nano-GO) and silicon dioxide (silica) nanoparticles (SiO2-nanoparicles) has been used to modify a glassy carbon electrode (GCE) for the determination of gallic acid (GA). The modified electrode surface was characterised by using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDXA) and Fourier transform infrared spectroscopy (FTIR). The electrochemical behaviour of the modified electrode was then studied, using cyclic voltammetry (CV) and differential pulse voltammetry (DPV), showing that the electrode was sensitive to GA in a concentration range of 6.25 × 10−6 to 1.0 × 10−3 mol L−1, with a correlation coefficient R2 of 0.9956 and a limit of detection of 2.09 × 10−6 mol L−1 (S/N = 3). The proposed method was successfully used for the determination of GA in red wine, white wine and orange juice, with recoveries of 102.3, 95.4 and 97.6%, respectively.

Citation

CHIKERE, C.O., FAISAL, N.H., KONG THOO LIN, P. and FERNANDEZ, C. 2019. The synergistic effect between graphene oxide nanocolloids and silicon dioxide nanoparticles for gallic acid sensing. Journal of solid state electrochemistry [online], 23(6), pages 1795-1809. Available from: https://doi.org/10.1007/s10008-019-04267-9

• Journal Article Type: Article
• Acceptance Date: Mar 29, 2019
• Online Publication Date: May 10, 2019
• Publication Date: Jun 30, 2019
• Deposit Date: May 13, 2019
• Publicly Available Date: May 13, 2019
• Journal: Journal of Solid State Electrochemistry
• Print ISSN: 1432-8488
• Electronic ISSN: 1433-0768
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 23
• Issue: 6
• Pages: 1795-1809
• DOI: https://doi.org/10.1007/s10008-019-04267-9
• Keywords: Graphene oxide nanocolloids; Gallic acid; SiO2 nanoparticles; Electrochemistry; Cyclic voltammetry; Differential pulse voltammetry
• Public URL: https://rgu-repository.worktribe.com/output/235939