Skip to main content

New insights into the intercalation chemistry of Al(OH)3

Williams, Gareth R.; Moorhouse, Saul J.; Prior, Timothy J.; Fogg, Andrew M.; Rees, Nicholas H.; O'Hare, Dermot


Gareth R. Williams

Saul J. Moorhouse

Andrew M. Fogg

Nicholas H. Rees

Dermot O'Hare


This paper reports a number of recent developments in the intercalation chemistry of Al(OH)(3). From Rietveld refinement and solid-state NMR, it has been possible to develop a structural model for the recently reported [(MAl4)-Al-II(OH)(12)](NO3)(2)center dot yH(2)O family of layered double hydroxides (LDHs). The M2+ cations occupy half of the octahedral holes in the Al(OH)(3) layers, and it is thought that there is complete ordering of the metal ions while the interlayer nitrate anions are highly disordered. Filling the remainder of the octahedral holes in the layers proved impossible. While the intercalation of Li salts into Al(OH)(3) is facile, it was found that the intercalation of M-II salts is much more capricious. Only with Co, Ni, Cu, and Zn nitrates and Zn sulfate were phase-pure LDHs produced. In other cases, there is either no reaction or a phase believed to be an LDH forms concomitantly with impurity phases. Reacting Al(OH)(3) with mixtures of M-II salts can lead to the production of three-metal M-II-M-II'-Al LDHs, but it is necessary to control precisely the starting ratios of the two MII salts in the reaction gel because Al(OH)(3) displays selective intercalation of M nitrate (Li > Ni > Co approximate to Zn). The three-metal M-II-M-II'-Al LDHs exhibit facile ion exchange intercalation, which has been investigated in the first energy dispersive X-ray diffraction study of a chemical reaction system performed on Beamline I12 of the Diamond Light Source.

Journal Article Type Article
Publication Date Jun 14, 2011
Print ISSN 1477-9226
Electronic ISSN 1477-9234
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 40
Issue 22
Pages 6012-6022
APA6 Citation Williams, G. R., Moorhouse, S. J., Prior, T. J., Fogg, A. M., Rees, N. H., & O'Hare, D. (2011). New insights into the intercalation chemistry of Al(OH)3. Dalton transactions : an international journal of inorganic chemistry / RSoC, 40(22), 6012-6022.
Keywords layered double hydroxides anion-exchange intercalation x-ray-diffraction multiple-quantum zn co gibbsite ni cu no3