Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/4801
Title: Synthesis and properties of A6B2(OH)16Cl2_4H2O (A = Mg, Ni, Zn, Co, Mn and B = Al, Fe) materials for environmental applications.
Authors: Dias, Anderson
Cunha, Lumena
Vieira, Andiara de Carvalho
Keywords: Oxides
Chemical synthesis
Raman spectroscopy
Issue Date: 2011
Citation: DIAS, A.; CUNHA, L.; VIEIRA, A. de. C. Synthesis and properties of A6B2(OH)16Cl2_4H2O (A = Mg, Ni, Zn, Co, Mn and B = Al, Fe) materials for environmental applications. Materials Research Bulletin, v. 46, p. 1346-1351, 2011. Disponível em: <http://www.sciencedirect.com/science/article/pii/S0025540811002248>. Acesso em: 02 fev. 2015.
Abstract: Double layered hydroxide materials of composition A6B2(OH)16Cl2_4H2O (A = Mg, Ni, Zn, Co, Mn and B = Al, Fe) were synthesized by chemical precipitation at 60 8C. Different levels of crystallinity and ordering degree were observed depending upon the chemical environment or the combination between divalent and trivalent cations. The results from high-resolution transmission electron microscopy revealed that nanostructured layered samples were obtained with interplanar spacing compatible with previous literature. Raman scattering was employed to investigate the complex band structure observed, particularly the lattice vibrations at lower frequencies, which is intimately correlated to the cationic radius of both divalent and trivalent ions. The results showed that strongly coordinated water and chloride ions besides highly structured hydroxide layers have a direct influence on the stability of the hydrotalcites. It was observed that transition and decomposition temperatures varied largely for different chemical compositions.
URI: http://www.repositorio.ufop.br/handle/123456789/4801
metadata.dc.identifier.doi: https://doi.org/10.1016/j.materresbull.2011.05.022
ISSN: 0025-5408
metadata.dc.rights.license: O periódico Materials Research Bulletin concede permissão para depósito deste artigo no Repositório Institucional da UFOP. Número da licença: 3577180950664.
Appears in Collections:DEQUI - Artigos publicados em periódicos

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