Naslov
Precipitation and characterization of hollow calcite nanoparticles

Autori
Kontrec, Jasminka ; Ukrainczyk, Marko ; Njegić Džakula, Branka ; Kralj, Damir

Izvornik
Crystal research and technology (0232-1300) 48 (2013), 9; 622-626

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
calcium carbonate ; carbonation ; nanoparticles ; hollow calcite

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA