After hydrolyzing zinc acetate in methanol solution, spherical ZnO nanoparticles in the
size range from about 2.5 to 5 nm were synthesized by maintaining a ZnO concentration
of 0.02M. Compared to ZnO nanoparticles prepared via other methods, the particles
prepared using our novel colloidal chemistry exhibit narrow size distribution and a high
sensitivity to the surrounding environment. The structure and composition of the white
powders precipitated from the colloidal solution can vary, depending on how the powder
samples are prepared. Factors such as desorption and adsorption of methanol, binding of
water and exposure to humid air have been studied to correlate to the structure and
composition observed from the precipitated powder. Methanol desorption rate and
excess KOH on the particle surface have played an important role in the structural
changes. Furthermore, upon annealing, the white precipitate is recovered to wurtize ZnO.
XRD and TEM are used to study the structural transformation of ZnO nanoparticles.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/4303 |
| Date | 30 October 2006 |
| Creators | Lee, Kwang Jik |
| Contributors | Sue, Hung-Jue |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Thesis, text |
| Format | 821490 bytes, electronic, application/pdf, born digital |
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