Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5362812 | Applied Surface Science | 2009 | 6 Pages |
Abstract
In this paper we present a systematic study on the morphological variation of ZnO nanostructure by varying the pH of precursor solution via solution method. Zinc acetate dihydrate and sodium hydroxide were used as a precursor, which was refluxed at 90 °C for an hour. The pH of the precursor solution (zinc acetate di hydrate) was increased from 6 to 12 by the controlled addition of sodium hydroxide (NaOH). Morphology of ZnO nanorods markedly varies from sheet-like (at pH 6) to rod-like structure of zinc oxide (pH 10-12). Diffraction patterns match well with standard ZnO at all pH values. Crystallinity and nanostructures were confirmed by high-resolution transmission electron microscopy (HRTEM) and selected area electron diffraction (SAED) pattern, which indicates structure grew along [0 0 0 1] direction with an ideal lattice fringes distance 0.52 nm. FTIR spectroscopic measurement showed a standard peak of zinc oxide at 464 cmâ1. Amount of H+ and OHâ ions are found key to the structure control of studied material, as discussed in the growth mechanism.
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Authors
Rizwan Wahab, S.G. Ansari, Young Soon Kim, Minwu Song, Hyung-Shik Shin,