Journal
ULTRASONICS SONOCHEMISTRY
Volume 16, Issue 1, Pages 35-40Publisher
ELSEVIER
DOI: 10.1016/j.ultsonch.2008.07.006
Keywords
Sonochemical synthesis; Nanoparticles; Nickel hydroxide; Additives
Categories
Funding
- FAPESP [03/10015-3]
- Instituto do Milenio de Materiais Complexos
- CNPq [152312/2007-2]
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The present paper describes the physical-chemical characterization and electrochemical behavior of a new nanomaterial formed by the addition of cadmium and cobalt atoms into the structure of nickel hydroxide nanoparticles, these ones synthesized by an easy sonochemical method. Particles of about 5 nm diameter were obtained and characterized by high resolution transmission electron microscopy (HRTEM), X-ray diffraction and Raman spectroscopy. Different nickel hydroxide nanoparticles were immobilized onto transparent conducting substrates by using electrostatic layer-by-layer providing thin films at the nanoscale and the electrochemical behavior was investigated. The formation of a mixed hydroxide was corroborated by observation of very interesting properties as redox potential shifting to less positive potentials and high stability when submitted to long electrochemical cycling or high times of ultrasonic synthesis, suggesting practical applications. (C) 2008 Elsevier B.V. All rights reserved.
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