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Precipitation and characterization of hollow calcite nanoparticles

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

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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
Uncontrolled Keywords: calcium carbonate; carbonation; nanoparticles; hollow calcite
Subjects: NATURAL SCIENCES > Chemistry
NATURAL SCIENCES > Chemistry > Physical Chemistry
Divisions: Division of Materials Chemistry
Project titleProject leaderProject codeProject type
Mehanizmi taloženja anorganskih biokompatibilnih i srodnih materijalaDamir Kralj098-0982904-2951MZOS
Depositing User: Jasminka Kontrec
Date Deposited: 16 Nov 2018 09:42
DOI: 10.1002/crat.201300178

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