Issue 4, 1999

New layered double hydroxides with the hydrotalcite structure containing Ni(II) and V(III)

Abstract

Layered double hydroxides (LDH) with the hydrotalcite-like structure, but containing Ni(II) and V(III) cations in the layers, have been prepared by the constant pH method. Characterization by elemental chemical analysis, powder X-ray diffraction, differential thermal analysis, thermogravimetric analysis, FT-IR spectroscopy, temperature-programmed reduction and specific surface area assessment indicates the formation of well crystallized materials after hydrothermal treatment, without significant oxidation of V(III) species, and with interlayer, flat-oriented, carbonate anions. Reduction in H 2 takes place in a single step at ca. 400 °C [Ni(II)→Ni(0)]; V(III) is not reduced. On calcination in air, Ni 2 V 3 O 8 is formed, together with NiO, but crystallization is only evident after calcination at 750 °C. No major difference was found between samples with Ni:V molar ratios close to 2 or 4.

Article information

Article type
Paper

J. Mater. Chem., 1999,9, 1033-1039

New layered double hydroxides with the hydrotalcite structure containing Ni(II) and V(III)

F. M. Labajos, M. Dolores Sastre, R. Trujillano and V. Rives, J. Mater. Chem., 1999, 9, 1033 DOI: 10.1039/A808544G

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