Data/hora: 02/06/2024 09:02:17

Biblioteca(s): | Embrapa Instrumentação.
Data corrente: | 26/07/2023
Data da última atualização: | 15/01/2024
Autoria: | FACURE, M. H. M.; MERCANTE, L. A.; CORREA, D. S.
Afiliação: | DANIEL SOUZA CORREA, CNPDIA.
Título: | Polyacrylonitrile/Reduced Graphene Oxide Free-Standing Nanofibrous Membranes for Detecting Endocrine Disruptors.
Ano de publicação: | 2023
Fonte/Imprenta: | ACS Applied Nano Materials, v. 5, 2022.
Páginas: | 6376–6384
DOI: | https://doi.org/10.1021/acsanm.2c00484
Idioma: | Inglês
Conteúdo: | Endocrine-disrupting chemicals (EDCs) are emerging pollutants whose uncontrolled release in natural aquatic environments can pose risks to human and animal health. In this scenario, the development of simple, low-cost, and sensitive methods to detect trace amounts of EDCs in the environment is highly sought. In this work, a nanofiber-based sensor was fabricated by functionalizing a polyacrylonitrile (PAN) electrospun nanofibrous membrane with reduced graphene oxide (rGO) to be used as a flexible and free-standing electrode to detect EDCs through electrical impedance measurements. The rGO was obtained from graphene oxide using a hydrothermal route, while the PAN/rGO composite membrane was prepared through vacuum filtration. The rGO provided high electrical conductivity to the membrane, which presented a good performance in the detection of endocrine hormones. The electrical resistance variation enabled the detection of 17&#945;ethinylestradiol (EE2) in a linear range between 10&#8722;5 and 10&#8722;11 mol L&#8722;1 . Moreover, by using the principal component analysis (PCA) for data treatment, the sensor was able to discriminate EE2, estrone, estradiol, and progesterone at 100 pmol L&#8722;1 in real river water samples. These results open up the possibility to fabricate in a simple way functionalized nanofibrous membranes to be used as sensing material for the detection of varied analytes with high sensitivity and low cost.
Palavras-Chave: | Electrical impedance spectroscopy; Electrospinning; Electrospun nanofibers; Impedimetric sensor.
Categoria do assunto: | --
Registro original: | Embrapa Instrumentação (CNPDIA)
Exemplares: | CNPDIA - (18256-1) - UPC - AP - DD - PROCI.23/70 -  - 2023/74 - DIS