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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/74094
Title: 
Voltammetric Study of a Cubic Silsesquioxane Organically Modified with Imidazole and their Subsequent Reaction with Cadmium and Hexacyanoferrate (III)
Author(s): 
Institution: 
Universidade Estadual Paulista (UNESP)
ISSN: 
1452-3981
Sponsorship: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Sponsorship Process Number: 
FAPESP: 03/12882-6
Abstract: 
A hybrid nanocomposite formed by interaction of a octa (3-chloropropyl)octasilsesquioxane modified with imidazol , and its subsequent reaction with cadmium and hexacyanoferrate (II) (CdHSSI) was incorporated into a graphite paste electrode and the electrochemical studies were conducted with cyclic voltammetry. The cyclic voltammogram of the modified graphite paste electrode with CdHSSI (GPE- CdHSSI), showed one redox couple with formal potential Eθ=0.14V (vs Ag/AgCl, NaNO3, 1.0 mol L-1; v = 20 mV s-1), attributed to the Fe2+(CN)6/ Fe3+(CN)6 process. The redox couple presents an electrocatalytic response for determination of ascorbic acid. The modified electrode gives a linear range from 2.0×10-4 mol L-1 to 9.0×10-4 mol L-1 (r=0.998) for the determination of ascorbic acid with detection limit of 1.21×10-4 mol L-1 with a relative standard deviation of 5% (n=3) and amperometric sensitivity of 6.217 mA/ mol L-1 for ascorbic acid. © 2013 by ESG.
Issue Date: 
1-Jan-2013
Citation: 
International Journal of Electrochemical Science, v. 8, n. 1, p. 872-886, 2013.
Time Duration: 
872-886
Keywords: 
  • Ascorbic acid
  • Graphite paste electrode
  • Imidazole
  • Silsesquioxane
  • Voltammetry
Source: 
http://www.electrochemsci.org/papers/vol8/80100872.pdf
URI: 
Access Rights: 
Acesso aberto
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/74094
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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