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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Development of Modified Electrodes Based on Self Assembled Films of Polypirrole and Carbon Nanotubes Composites for Pesticides Monitoring

Texto completo
Autor(es):
de Araujo, Gabriela Martins [1] ; Polacci, Luis Antonio [1] ; Mazo, Tatiana [1] ; Codognoto, Lucia [2] ; Simoes, Fabio Ruiz [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed Sao Paulo, Dept Ciencias Mar, Av Almirante Saldanha Gama 89, BR-11030400 Santos, SP - Brazil
[2] Univ Fed Sao Paulo, Dept Ciencias Exatas & Terra, Rua Prof Arthur Riedel 275, BR-09972270 Diadema, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: MRS ADVANCES; v. 1, n. 21, p. 1561-1569, 2016.
Citações Web of Science: 1
Resumo

In this work polypyrrole (PPy) and its respective composite with functionalized multiwalled carbon nanotubes (PPy-MWCNT) was obtained by the chemical polymerization of the monomer pyrrole (PPy) in aqueous solution by the dropwise addition of a solution of ammonium persulfate (PSA). The obtained PPy as well as its composite (PPy-MWCNT) were used to prepare two self-assembled films (SA) by the immersion of ITO blades (Inidium Tin Oxide) into PPy and PPy-MWCNT dispersions with alternated immersions into Polystyrene sulfonate (PSS) dispersion, thus resulting in a bilayer. The SA films were produced with ten bilayers (alternated layers of PPy or its composite). The obtained films were characterized by Fourrier Transformed Infrared Spectroscopy (FTIR), UV-Visible analysis, voltammetric analyses (square wave and cyclic voltammetry) and Scanning Electron Microscopy (SEM). The SA films were evaluated to determine the chlorothalonil pesticide which is commonly used as anti-fouling agent in marine environments. The SWV results showed a reduction peak at around -0.8 to 1.2 V (according to pH). It was also observed a synergic effect of the composite film (PPy-MWCNT/PSS) to determine the chlorothalonil by increase of the peak currents. (AU)

Processo FAPESP: 14/23858-3 - Desenvolvimento de materiais de sensores baseados em filmes automontados de polímeros condutores e nanotubos de carbono para a determinação de desreguladores endócrinos em ambientes marinhos
Beneficiário:Fabio Ruiz Simões
Linha de fomento: Auxílio à Pesquisa - Regular