Single-step electrochemical fabrication of nanoporous gold film with reduced graphene oxide for carbendazim quantification in river water
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Carbendazim (CBZ) is a broad-spectrum fungicide used worldwide to control fungal infestations in various crops.
However, its remarkable stability has raised concerns about accumulation in soils and aquatic environments,
garnering significant attention from the analytical community. In this report, we propose a nanoporous gold
electrode with reduced graphene oxide (NPGrGO) prepared according to a mold-assisted electrodeposition
method, in which the gold film was deposited simultaneously with the reduction of graphene oxide on a gold
microfiber surface for CBZ determination. The NPGrGO electrode exhibited a high density of edges with graphene
sheets confined within the pores in the presence of gold nanoparticles. This unique configuration
significantly enhances the electrochemical surface area and the roughness factor, directly influencing electrochemical
measurements. Differential pulse voltammetry results show a linear behavior in the CBZ concentration
range of 1 – 200 μmol L 1 with a limit of detection of 0.3 μmol L 1 and a limit of quantification of 1.0 μmol L 1.
Besides, the NPGrGO sensor also revealed excellent reproducibility (4.2 %), repeatability (3.7 %), and selectivity
toward CBZ detection in the presence of other interfering molecules or ions. Finally, as proof of concept, the
NPGrGO was used to determine CBZ in river water samples. Therefore, we have demonstrated a simple and rapid
method for fabricating an NPGrGO electrochemical sensor, highlighting its significant potential for applications
in environmental analysis.
Como referenciar
SILVA JUNIOR, GILBERTO J.; FELIPE, LUIZ F.Z.; PINTO, ALINE L.M.; ARAUJO, DIELE A.G.; PAIXAO, THIAGO R.L.C.; REGIART, MATIAS; BERTOTTI, MAURO. Single-step electrochemical fabrication of nanoporous gold film with reduced graphene oxide for carbendazim quantification in river water. Electrochimica Acta, v. 525, p. 1-8, 2025. DOI: 10.1016/j.electacta.2025.146162. Disponível em: https://repositorio.ipen.br/handle/123456789/49359. Acesso em: 20 Mar 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.