Filmes de azul da Prússia sobre ITO: estudos de pós-tratamento e estabilidade frente diferentes pHs e diferentes compostos fosfatados / Films of Prussian blue on ITO: studies of post-treatment and stability in differents pHs and differents phosphate compounds

AUTOR(ES)

Rafael Machado Reis

DATA DE PUBLICAÇÃO

2008

RESUMO

In this work it was studied the influence of the electrochemical posttreatment parameters in potenciodinamics conditions on the stability and reactivity against organophosphates by eletrodepositaded iron (III) hexacyanoferrate (II), better known as blue of Prussia (PB). The posttreatment of the film at low sweep rates leads to the formation of the PB "soluble" with the formation of larger grains and a more electrochemically stable films as demonstrated by cyclic voltammetry (VC), atomic force microscope (AFM) and X-ray photoelectron espectroscopic (XPS) tests. Films post-treated in HCl/KCl 0.1 M media were more electrochemically stable in an acid media, while films submitted to post-treatment in neutral media were more stable in neutral media.

ASSUNTO(S)

eqcn pb xps pb phosphate compounds xps thin films prussian blue eqcn azul da prússia compostos fosfatados filmes finos

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