Polyvinylpyrrolidone electrospun nanofibers doped with Eu3+: Fabrication, characterization, and application in gas sensors

Autor(es)

Terra, Idelma A. A. ^[1] ; Sanfelice, Rafaela C. ^[2] ; Scagion, Vanessa P. ^{[1, 3]} ; Tomazio, Nathalia B. ^[4] ; Mendonca, Cleber R. ^[4] ; Nunes, Luiz A. O. ^[4] ; Correa, Daniel S. ^{[1, 3]}

Afiliação do(s) autor(es)

^[1] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr LNNA, BR-13560970 Sao Paulo - Brazil

^[2] Univ Fed Triangulo Mineiro UFTM, Inst Ciencias Tecnol & Exatas ICTE, Dept Engn Quim, Uberaba, MG - Brazil

^[3] Fed Univ Sao Carlos UFSCar, Ctr Exact Sci & Technol, PPGQ, Dept Chem, Sao Paulo - Brazil

^[4] Sao Paulo Univ USP, Sao Carlos Inst Phys IFSC, BR-13560970 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 136, n. 29 AUG 5 2019.
• Citações Web of Science: 0

Resumo

Polymer nanofibers (NFs)-based optical sensors hold great potential to fabricate low-cost devices capable to monitor different volatile organic compounds (VOCs) related to healthcare and environmental conditions. For instance, ammonia detection is a subject of paramount importance, owing to the serious health problems associated to the exposition to this volatile. In this context, here, we report on the development of optical electrospun NFs composed of polyvinylpyrrolidone (PVP) doped with Europium (Eu3+) aiming at the detection of ammonia. The fabricated NFs were characterized by scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, fluorescence microscopy, photoluminescence, and excited state lifetime spectroscopies. The luminescence properties changes were evaluated by exposing the PVP\_Eu3+ NFs to ammonia and other distinct interfering VOCs including toluene, tetrahydrofuran, acetone, triethylamine, acetic acid, and chloroform. The sensor exhibited a linear response to ammonia exposition in the concentration range from 0 to 50ppm, yielding a detection limit of 4.7 ppm. Our results indicate the potential application of PVP\_Eu3+ electrospun NFs in optical sensors for ammonia detection at room temperature based on luminescence quenching. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47775. (AU)

• Processo FAPESP: 17/12174-4 - Desenvolvimento de nanofibras poliméricas híbridas para aplicação na agricultura
• Beneficiário: Daniel Souza Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Regular