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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.)

Synthesis and characterization of alpha-nickel (II) hydroxide particles on organic-inorganic matrix and its application in a sensitive electrochemical sensor for vitamin D determination

Full text
Author(s):
Canevari, Thiago C. [1] ; Cincotto, Fernando H. [1] ; Landers, Richard [2] ; Machado, Sergio A. S. [1]
Total Authors: 4
Affiliation:
[1] State Univ Sao Paulo, Inst Chem, BR-13560970 Sao Carlos, SP - Brazil
[2] Univ Estadual Campinas, Gleb Wataghin Inst Phys, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Electrochimica Acta; v. 147, p. 688-695, NOV 20 2014.
Web of Science Citations: 10
Abstract

This paper describes the synthesis, characterization and application of amorphous nickel (II) hydroxide particles, alpha-Ni(OH)(2), onto a hybrid material composed of silica and graphene oxide, SiO2/GO. The sol-gel process using HF as the catalyst was used to obtain this organic-inorganic matrix. The Ni(OH)(2) were prepared directly on the surface of the matrix using nickel (II) acetate and N, N-dimethylformamide (DMF) as a solvent. The SiO2/GO/Ni(OH)(2) material was characterized by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), energy-dispersive X-ray (EDX), X-ray photoelectron spectroscopy (XPS) and electrochemical techniques. A glassy carbon electrode modified with the SiO2/GO/Ni(OH)(2) material was used in the development of a sensitive electrochemical sensor for the determination of vitamin D-3 by pulse differential voltammetry. A well-defined electro-oxidation peak of vitamin D-3 was observed in sodium hydroxide at pH 13. The results indicated that the resultant SiO2/GO/Ni(OH)(2) modified electrode is highly selective and very sensitive with a limit of detection, in pure laboratory solutions of 3.26 x 10(-9) mol dm(-3); therefore, it can be used to detect vitamin D3 in real samples. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/18339-1 - Detection of endocrine disruptors testosterone and estradiol in environmental samples utilizing modified electrodes with graphene, the gold nanoparticles and quantum dots.
Grantee:Fernando Henrique Cincotto
Support Opportunities: Scholarships in Brazil - Doctorate
FAPESP's process: 11/23047-7 - Development of an electrochemical biosensor based on mesoporous silicon containing carbon nanotubes obtained by a sol-gel process. Electrochemical determination of pesticides.
Grantee:Thiago da Cruz Canevari
Support Opportunities: Scholarships in Brazil - Post-Doctoral