Preparation and characterization of colloidal Ni(OH)(2)/bentonite composites

A conductive and electrochemically active composite material has been prepared by the combination of bentonite and nickel hydroxide precursor sol. This material exhibits the characteristic intercalation properties of the clay component and the electrochemical and optical properties of nickel hydroxide. The clay particles seem to induce the aggregation of nickel hydroxide, leading to the formation of a layer of alpha-Ni(OH)(2) exhibiting needle like morphology. The composite forms stable films and has been conveniently used for the preparation of modified electrodes exhibiting intercalation and electrochemical properties, thus providing an interesting material for the development of amperometric sensors. (C) 2008 Elsevier Ltd. All rights reserved.

Fundacao de Amparo A Pesquisa do Estado de Sao Paulo (FAPESP)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)[473446/2003-0]

Fundacao Araucaria

Fundacao Araucaria[4642/2003]

Fundacao Araucaria[10647-PPP/2006]

Fundacao Araucaria

Instituto do Milenio de Materiais Complexos (IMMC)

Instituto do Milenio de Materiais Complexos (IMMC)

Rede de Nanotecnologia Molecular e de Interfaces (RENAMI)

Rede de Nanotecnologia Molecular e Interfaces (RENAMI)