Using Bismuth Vanadate/Copper Oxide Nanocomposite as Photoelectrochemical Sensor for Naproxen Determination in Sewage

Autor(es)

do Prado, Thiago M. ^[1] ; Badaro, Carolina C. ^[1] ; Machado, Rafaela G. ^[1] ; Fadini, Pedro S. ^[1] ; Fatibello-Filho, Orlando ^[1] ; Moraes, Fernando C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Chem Dept, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electroanalysis; v. 32, n. 9 MAY 2020.
• Citações Web of Science: 0

Resumo

Conventional sewage treatment plants are not usually designed to remove emerging contaminants, and this shortcoming leads to the discharge of pharmaceuticals, among other emerging pollutants, into the environment. The present work reports the development of BiVO4/CuO-based photoelectrochemical sensor for the determination of naproxen in sewage samples. Morphological characterizations were carried out by X-ray diffraction and Scanning electron microscopy. The band gap energy of the nanocomposite material was calculated by Tauc plots using the data obtained from diffuse reflectance spectroscopy analysis. The sensor presented analytical signal during the photocurrent generation simultaneously with the oxidation of naproxen on the working electrode. The sensor responses were found to be proportional to the increase in naproxen concentration in the linear range of 5 nmol L-1 to 480 nmol L-1, R-2=0.996, with a limit of detection of 5 nmol L-1. The presence of naproxen in sewage samples was successfully determined with recovery percentages above 95 %. (AU)

• Processo FAPESP: 14/50951-4 - INCT 2014: Tecnologias Analíticas Avançadas
• Beneficiário: Celio Pasquini
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos
• Beneficiário: Maria Valnice Boldrin
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/10118-0 - Estudo e aplicação da tecnologia eletroquímica para a análise e a degradação de interferentes endócrinos: materiais, sensores, processos e divulgação científica
• Beneficiário: Marcos Roberto de Vasconcelos Lanza
• Modalidade de apoio: Auxílio à Pesquisa - Temático