Kontrec, Jasminka; Ukrainczyk, Marko; Njegić Džakula, Branka; Kralj, Damir (2013) Precipitation and characterization of hollow calcite nanoparticles. Crystal research and technology, 48 (9). pp. 622-626. ISSN 0232-1300
Abstract
A method for preparation of significant amount of hollow rhombohedral calcite nanoparticles, based on carbonation of calcium hydroxide suspension, is described. The mineralogical and morphological analyses of the precipitate confirmed the existence of exclusively stable polymorphic modification, calcite, with the mean particle size of about 100 nm and the diameter of the holes observed at the surfaces that are about 50 nm. The analysis of carbonation kinetics pointed out to a complex mechanism of hollow particles formation at high initial supersaturation, that assumed nucleation of amorphous precursor calcium carbonate phase and its solution mediated transformation into nanosized crystalline calcite. The holes obtained at the calcite surfaces are most probably the imprints remained after the dissolution of amorphous calcium carbonate particles.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | calcium carbonate; carbonation; nanoparticles; hollow calcite | ||||||||
| Subjects: | NATURAL SCIENCES > Chemistry NATURAL SCIENCES > Chemistry > Physical Chemistry |
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| Divisions: | Division of Materials Chemistry | ||||||||
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| Depositing User: | Jasminka Kontrec | ||||||||
| Date Deposited: | 16 Nov 2018 09:42 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/4304 | ||||||||
| DOI: | 10.1002/crat.201300178 |
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