Solution decomposition of the layered double hydroxide (LDH) of Zn with Al
2007; Elsevier BV; Volume: 9; Issue: 3-4 Linguagem: Inglês
10.1016/j.solidstatesciences.2007.01.002
ISSN1873-3085
AutoresSylvia Britto, A.V. Radha, N. Ravishankar, P. Vishnu Kamath,
Tópico(s)Inorganic Chemistry and Materials
ResumoThe layered double hydroxides (LDH) of Zn with Al containing intercalated CO32− and NO3− ions undergo solution decomposition to yield a highly crystalline oxide mixture comprising ZnO and ZnAl2O4 at temperatures as low as 150–180 °C under hydrothermal conditions. In contrast solid-state decomposition takes place at a much higher temperature (240–315 °C) in air. Solution decomposition is not only guided by the low octahedral crystal field stabilization energy of Zn2+ ions, a factor that also affects solid-state decomposition, but also by solubility considerations. The LDHs of Mg and Ni with Al do not undergo solution decomposition.
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