Data/hora: 20/06/2024 18:08:39

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