Electrochemical sensor based on epoxy-functionalized BEA nanozeolite and graphene oxide modified glassy carbon electrode for bisphenol E determination

Autor(es)

Miller, Alex H. ; Nguyen, Huong Thi-Thanh ; Nery, Jose G. ; Fielding, Alistair J.

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Electrochemistry; v. 53, n. 8, p. 11-pg., 2023-03-18.

Resumo

An epoxy-functionalized beta type nanozeolite (BEA)/graphene oxide nanocomposite modified glassy carbon electrode (GCE/BEA/APTMS/GA/GO/NF) has been created for the differential pulse voltammetric determination of bisphenol E (BPE). The modified electrode presented an enhanced current response in comparison with bare GCE. A linear dependence of anodic peak current (I-p) and scan rate (nu) was observed, which showed that the electrochemical process was adsorption-controlled. Differential pulse voltammetry (DPV) was employed and optimized for the sensitive determination of BPE. Under the optimized conditions, the anodic peak current was linearly proportional to BPE concentration in the range between 0.07 and 4.81 mu M, with a correlation coefficient of 0.995 and limit of detection 0.056 mu M (S/N = 3). The electrode showed good repeatability and storage stability, and a low response to interfering compounds. Comparison was made to the determination of bisphenol A. To confirm the electrode analytical performance, recovery tests were performed, and deviations lower than 10% were found. The BEA zeolite-GO nanocomposite proved to be a promising sensing platform for bisphenol determination. [GRAPHICS] . (AU)

• Processo FAPESP: 16/24303-0 - Síntese e caracterização de novos biocatalisadores formados por complexos de nanozeólitas e enzimas lacases: suas aplicações em reações de oxidação do glicerol a compostos ácido tartrônico e ácido mesoxálico
• Beneficiário: Alex Henrique Miller
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/21483-3 - Investigação espectroscópica e eletroquímica da oxidação de glicerol Lacase/TEMPO-mediada
• Beneficiário: Alex Henrique Miller
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado