Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/65195
Type: Artigo de periódico
Title: Electrochemical study of methylene blue adsorbed on he silica gel modified with niobium oxide.
Author: Schiavo, DD
Perez, EF
Kubota, LT
Abstract: Methylene blue (AM) was immobilised on surface of the silica gel modified with niobium oxide. This material was incorporated in a carbon paste electrode, which showed a redox couple in a potential of E= -113 mV rs SCE in KCl solution at pH 7.0, The formal potential, in 0.5 mol L-1 KCl at pH 7.0, shifted about 290 mV towards more positive values compared to those observed for AM solubilized in aqueous solution, The dependence on the formal potential with solution pH between 2 and 7 was much lower than those observed for AM solubilized in aqueous solution.
Subject: methylene blue
silica gel modified with niobium oxide
carbon paste electrode
Country: Brasil
Editor: Soc Brasileira Quimica
Rights: aberto
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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