Preparation of ZnO nanoparticles: Structural study of the molecular precursor


Autoria(s): Tokumoto, M. S.; Briois, V; Santilli, Celso Valentim; Pulcinelli, Sandra Helena
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/01/2003

Resumo

The structure of zinc acetate derived precursor currently used in the sol-gel synthesis of ZnO nanoparticles is described. The reaction products obtained before and after reflux of ethanolic zinc acetate solution have been studied by UV-Vis, photoluminescence, FTIR and EXAFS at the Zn K edge. EXAFS results evidence for both precursor solutions a change from the octahedral coordination sphere of oxygen atoms characteristic of the solid zinc acetate dihydrate compound into a four-fold environment. The EXAFS spectra of precursor solutions can be satisfactorily reproduced using the molecular structure reported for Zn4O(Ac)(6) (Ac = COOCH3). UV-Vis and FTIR measurements are also in agreement with the formation of this oligomeric precursor. The structural modification is more pronounced after reflux at 80degreesC, because the increase of the Zn4O(Ac)(6) amount and the formation of nearly 3.0 nm sized ZnO nanoparticle.

Formato

547-551

Identificador

http://dx.doi.org/10.1023/A:1020711702332

Journal of Sol-gel Science and Technology. Dordrecht: Kluwer Academic Publ, v. 26, n. 1-3, p. 547-551, 2003.

0928-0707

http://hdl.handle.net/11449/38057

10.1023/A:1020711702332

WOS:000178789100097

Idioma(s)

eng

Publicador

Kluwer Academic Publ

Relação

Journal of Sol-Gel Science and Technology

Direitos

closedAccess

Palavras-Chave #sol-gel precursor #ZnO nanoparticles #EXAFS
Tipo

info:eu-repo/semantics/article