Fe2V4O13 photoanode material: an interesting approach to non-enzymatic glucose oxidation

Autor(es)

da Silva Pelissari, Marcelo Rodrigues ; Camargo, Luan Pereira ; Catarini da Silva, Paulo Rogerio ; Dall'Antonia, Luiz Henrique

• Tipo de documento: Artigo Científico
• Fonte: Journal of Materials Science; v. 57, n. 14, p. 18-pg., 2022-04-05.

Resumo

The use of non-enzymatic material for the electrooxidation reaction of glucose is still a challenge to be overcome since these materials must have high sensitivity to glucose, high chemical stability and, if possible, be obtained quickly and with a low-cost process. In this context, iron vanadate (Fe2V4O13) was successfully synthesized using the easy and low-cost Successive Ionic Layer Adsorption and Reaction process and used as an interesting non-enzymatic photoanode material approach for the photoelectrochemical oxidation reaction of glucose. From the X-ray diffraction and Raman measurements, it was possible to observe that the monoclinic crystalline phase Fe2V4O13 was formed at 500 degrees C, without any secondary phases. The electrochemical characterization, performed by linear sweep voltammetry (LSV), chronoamperometry and electrochemical impedance spectroscopy techniques, under light condition, showed the remarkable photoelectrochemical activity of the FTO/Fe2V4O13 electrode, such as a high photocurrent density at + 0.6 V vs. Ag/AgCl (0.2 mA cm(-2)); good reproducibility under transient light condition; low charge transfer resistance; and flat band potential consistent with the LSV and typical value of this material (+ 0.45 V). The performance of the electrode as non-enzymatic glucose interaction, carried out by chronoamperometry technique, showed a remarkable performance in the photoelectrooxidation reaction of glucose, with linear behavior (R-2 = 0.9975) of the analytical curve (glucose concentration from 0 to 10 mmol L-1), excellent reproducibility, a slight loss in photoelectrochemical signal after five successive reading cycles, good sensitivity (0.370 mu A mM(-1) cm(-2)) and limit of detection (52 mu mol L-1). Besides, the analysis of interference species showed good electrode selectivity. [GRAPHICS] . (AU)

• Processo FAPESP: 14/50867-3 - INCT 2014: Instituto Nacional de Ciência e Tecnologia de Bioanalítica
• Beneficiário: Marco Aurelio Zezzi Arruda
• Modalidade de apoio: Auxílio à Pesquisa - Temático