Preparation of ZnO Nanoparticles: Structural Study of the Molecular Precursor |
| |
Authors: | M.S. Tokumoto V. Briois C.V. Santilli S.H. Pulcinelli |
| |
Abstract: | 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 80°C, because the increase of the Zn4O(Ac)6 amount and the formation of nearly 3.0 nm sized ZnO nanoparticle. |
| |
Keywords: | sol-gel precursor ZnO nanoparticles EXAFS |
本文献已被 SpringerLink 等数据库收录! |