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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.)

Voltammetric Properties of Nickel Hexacyanoferrate (III) Obtained on the Titanium (IV) Silsesquioxane Occluded into the H-FAU Zeolite for Detection of Sulfite

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Author(s):
do Carmo, Devaney Ribeiro [1] ; Maraldi, Vitor Alexandre [1] ; Cumba, Loanda Raquel [1]
Total Authors: 3
Affiliation:
[1] UNESP Univ Estadual Paulista, Dept Fis & Quim, Fac Engn Ilha Solteira, Av Brasil Ctr 56, BR-15385000 Ilha Solteira, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: SILICON; v. 11, n. 1, p. 267-276, FEB 2019.
Web of Science Citations: 0
Abstract

A composite prepared from titanium (IV) silsesquioxane and phosphoric acid (TTiP) was prepared and occluded into the H-FAU zeolite (ZTTiP). The material was chemically modified with nickel and subsequently by potassium hexacyanoferrate (III) (ZTTiPNiH). It was preliminarily characterized by infrared spectroscopy (IR), energy dispersive X-ray spectroscopy (EDS) and cyclic voltammetry (CV). The voltammetric behavior of ZTTipNiH was obtained employing a modified graphite paste electrode (GPE) showing one well-defined redox couple with a formal potential of E?= 0.51V (vs Ag/AgCl(sat)), KCl (3M) (20% w/w; v = 20 mV s(-1); KCl; 1.00 mol L-1) corresponding to the (NiFeII)-Fe-II(CN)(6)/(NiFeIII)-Fe-II(CN)(6) redox process. After rigorous voltammetric studies, the GPE modified with ZTTiPNiH was applied for facile and rapid detection of sulfite. From the analytical curve, a linear response was obtained in a concentration range of 0.05 to 0.80 mmol L-1 and a detection limit (3 sigma) of 0.05 mmol L-1 with a relative standard deviation of 4.21% (n = 3) and an amperometric sensitivity of 14.42 mA L mol(-1) for sulfite. (AU)

FAPESP's process: 12/05438-1 - Development of novel nanostructured organically functionalized hybrid silsesquioxanes: preparation, characterization and its application as a sensor of compounds and ions of environmental and biological interest
Grantee:Devaney Ribeiro Do Carmo
Support type: Regular Research Grants