Ionic-Liquid-Assisted Morphology Tuning of Calcium Carbonate in Ethanolic Solution
authors Fernandes, M; Paz, FAA; Bermudez, VD
nationality International
journal EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
author keywords Calcium carbonate; Ionic liquids; Polymorphism; Morphology; Heterocycles
keywords INORGANIC MATERIALS; NANOPARTICLES; EFFICACY
abstract The influence of 1-ethyl-3-methylimidazolium chloride, 1-butyl-3-methylimidazolium chloride, 1-butyl-1-methylpyrrolidinium chloride, 1-ethyl-3-methylimidazolium tetrafluoroborate and 3-(2-hydroxyethyl)-1-methylimidazolium tetrafluoroborate ionic liquids (ILs) on the morphology and structure of CaCO3 has been investigated in an ethanolic medium by using calcium chloride and ammonium carbonate as the calcium and carbon sources, respectively. Syntheses were carried out at 9 degrees C and room temp. at different IL concentrations and CO32/Ca2+ molar ratios. No polymorph selectivity was detected, and calcite was the sole crystalline form obtained under all the considered reactions conditions. In the case of the BF4-based ILs, anion decomposition occurred, which led to the formation of fluorite. Low temperature reduced the precipitation rate. With the ILs employed, the morphology of CaCO3 has been finely tailored: calcite microcubes, microframes and microboxes with potential application in drug delivery, as well as nanocubes and nanocorn-like objects were produced with Cl-based ILs; with BF4-based ILs, hierarchically structured materials, in which calcite coexists with fluorite, and complex and intricate shapes were produced, such as nanostructured microspheres, nanostructured calla-lily-like and ice-cream-ball-like micro-objects.
publisher WILEY-V C H VERLAG GMBH
issn 1434-1948
year published 2012
issue 13
beginning page 2183
ending page 2192
digital object identifier (doi) 10.1002/ejic.201101228
web of science category Chemistry, Inorganic & Nuclear
subject category Chemistry
unique article identifier WOS:000303155200001
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