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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
de Araujo, Gabriela Martins [1] ; Polacci, Luis Antonio [1] ; Mazo, Tatiana [1] ; Codognoto, Lucia [2] ; Simoes, Fabio Ruiz [1]
Total Authors: 5
Affiliation:
[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
Total Affiliations: 2
Document type: Journal article
Source: MRS ADVANCES; v. 1, n. 21, p. 1561-1569, 2016.
Web of Science Citations: 1
Abstract

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)

FAPESP's process: 14/23858-3 - Development of sensor materials based on self assembled fims of conducting polymers and carbon nanotubes for the determination of endocrine disrupters in marine environments
Grantee:Fabio Ruiz Simões
Support type: Regular Research Grants