A general nonaqueous route to crystalline alkaline earth aluminate nanostructures

Nanoscale
Mohamed KarmaouiNicola Pinna

Abstract

A nonaqueous route based on the solvothermal reaction of alkaline earth precursors with aluminium isopropoxide in benzyl alcohol is introduced. This simple process leads to crystalline complex nanostructures of alkaline earth aluminates, which, up to now, could only be obtained by solid state reaction at temperatures above 1100 degrees C or by sol-gel and further calcination at temperatures only slightly lower ( approximately 800 degrees C). The approach appears to be rather general since under the same reaction conditions BaAl(2)O(4), CaAl(4)O(7), and SrAl(4)O(7) could be obtained. The as-synthesized materials were characterized by X-ray diffraction, electron microscopy techniques, solid-state NMR and FT-IR spectroscopies. The reaction mechanism, which was studied as well, indicates the in-situ formation of benzoate species. These can preferentially bind to particular crystallographic facets of the aluminates via bridging bonds, thereby stabilizing the surfaces that give rise to the peculiar complex structure of the final material. In order to supplement the synthesis approach and to investigate the formation of impurity phases, pure aluminium oxide hybrid nanostructures were synthesized under similar conditions and fully char...Continue Reading

References

Sep 9, 2004·Chemical Reviews·Brian L CushingCharles J O'Connor
Jul 13, 2006·Physical Chemistry Chemical Physics : PCCP·Markus Niederberger, Helmut Cölfen
Aug 24, 2006·Chemistry : a European Journal·Markus Niederberger, Georg Garnweitner
Apr 28, 2007·Accounts of Chemical Research·Markus Niederberger
May 26, 2007·Angewandte Chemie·Jongnam ParkTaeghwan Hyeon
Jun 19, 2008·Angewandte Chemie·Nicola Pinna, Markus Niederberger

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Citations

Sep 26, 2014·Chemical Reviews·Sébastien RoyerHoushang Alamdari
Apr 5, 2013·Nanoscale·Mohamed KarmaouiFernando Palacio
May 21, 2015·Physical Chemistry Chemical Physics : PCCP·D DutczakA Meijerink
Oct 21, 2016·The Journal of Physical Chemistry Letters·Mohamed KarmaouiUroš Cvelbar
Apr 16, 2019·Chemistry : a European Journal·Luyao LiStanislaus S Wong

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