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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.)

Treatment of Reticulated Vitreous Carbon by Dielectric Barrier Discharge Plasma for Electrodes Production

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Autor(es):
Goncalves Da Silva, Leide Lili [1] ; Ferreira, Luiz Gustavo [2] ; Santos, Alberto Lima [3] ; Botelho, Edson Cocchieri [3] ; Toth, Andras [4] ; Kostov, Konstantin G. [5]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] FATEC, BR-12445010 Pindamonhangaba - Brazil
[2] Sch Lorena, Dept Mat Engn, BR-76655 Lorena - Brazil
[3] Sao Paulo State Univ UNESP, Dept Mat & Technol, BR-12516410 Guaratingueta - Brazil
[4] Hungarian Acad Sci, Chem Res Ctr, Inst Mat & Environm Chem, H-1025 Budapest - Hungary
[5] Sao Paulo State Univ UNESP, Dept Chem & Phys, BR-12516410 Guaratingueta - Brazil
Número total de Afiliações: 5
Tipo de documento: Artigo Científico
Fonte: IEEE TRANSACTIONS ON PLASMA SCIENCE; v. 41, n. 12, 1, SI, p. 3207-3213, DEC 2013.
Citações Web of Science: 0
Resumo

This paper deals with the surface modification of reticulated vitreous carbon (RVC) by dielectric barrier discharge (DBD) for electrodes production. RVC samples were exposed to air-DBD plasma for 5.0 and 10.0 min. Following the treatment, the specimens were characterized by scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), contact angle measurements, and electrochemical analyses {[}cyclic voltammetry (CV)]. The SEM images show an alteration of the RVC surface morphology because of the surface etching during the DBD processing. This finding is in agreement with the enhanced specific electrochemical surface area of RVC electrodes, which is related to an increase of its surface roughness. In addition, a slight increase of the oxygen content on the surface was confirmed by XPS analysis. Therefore, the RVC surface became more hydrophilic as detected by water contact angle measurements. For corroborating this statement, a solid monolithic vitreous carbon was used for this test. An increase in the anodic charge of the RVC electrodes due to the surface oxidation was also observed. Raman spectra showed insignificant changes in the material crystalline structure. (AU)

Processo FAPESP: 10/03148-0 - Estudo da superfície do carbono vítreo reticulado após tratamento a plasma por descarga de barreira dielétrica (DBD) para a obtenção de eletrodos
Beneficiário:Luiz Gustavo Ferreira
Linha de fomento: Bolsas no Brasil - Iniciação Científica
Processo FAPESP: 07/03714-3 - Tratamento interfacial de compósitos termoplásticos e de carbono vítreo através de técnicas assistidas por plasma para aplicações aeroespacial, eletroquímica e biomédica
Beneficiário:Leide Lili Gonçalves da Silva Kostov
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores