Naslov
Formation of nanosize ZnO particles by thermal decomposition of zinc acetylacetonate monohydrate

Autori
Musić, Svetozar ; Šarić, Ankica ; Popović, Stanko

Izvornik
Ceramics international (0272-8842) 36 (2010), 3; 1117-1123

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

Ključne riječi
powders: chemical preparation ; electron microscopy ; X-ray methods ; ZnO

Sažetak
Formation of ZnO particles by thermal decomposition of zinc acetylacetonate monohydrate in air atmosphere has been investigated using XRD, DTA, FT-IR, and FE SEM as experimental techniques. ZnO as a single phase was produced by direct heating at ≥ 200°C. DTA in air showed an endothermic peak at 195°C assigned to the ZnO formation and exothermic peaks at 260, 315 and 365°C, with a shoulder at 395°C. Exothermic peaks can be assigned to combustion of an acetylacetonate ligand released at 195°C. ZnO particles prepared at 200°C have shown no presence of organic species, as found by FT-IR spectroscopy. Particles prepared for 0.5 h at 200°C were in the nanosize range from ~20 to ~40 nm with a maximum at 30 nm approximately. The crystallite size of 30 nm was estimated in the direction of the a1 and a2 crystal axes, and in one direction of the c-axis it was 38 nm, as found with XRD. With prolonged heating of ZnO particles at 200°C the particle/crystallite size changed little. However, with heating temperature increased up to 500 or 600°C the ZnO particle size increased, as showed by FE SEM observation. Nanosize ZnO particles were also prepared in two steps: (a) by heating of zinc acetylacetonate monohydrate up to 150°C and distillation of water and organic phase, and (b) with further heating of so obtained precursor at 300°C.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Kemija

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