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An Approach for Synthesis and Characterization of Zirconia Nanopowder via Microwave Thermal Process
Athar, Taimur,Han, Sanghwan,Ko, Taegyung,Lee, Ik-Mo Taylor Francis 2009 Synthesis and reactivity in inorganic, metal-organ Vol.39 No.5
<P> We applied a simple, versatile and an efficient non-toxic methodology based on microwave irradiation process to prepare a gel from n-zirconium butoxide without using any solvent at ambient temperature to open new possibilities to control particle size distribution, surface chemistry and agglomeration. The alkoxy-derived gel changed to tetragonal zirconia powder on heating at 400°C with crystalline particles size (3 ∼ 5 nm). Zirconia exhibited strong luminescence under a UV laser. The presence of a organic moieties as impurities exhibit a strong luminescence in zirconia powder. From the structural analysis it is concluded that the morphology of the oxide strongly depends on the nature of the precursors and the synthetic methology.</P>
An Integrated Low Temperature Approach for the Synthesis of Titania via Sol-Gel process
Athar, Taimur,Han, Kyusuk,Han, Sanghwan,Ko, Taegyung,Lee, Ik-Mo Taylor Francis 2009 Synthesis and reactivity in inorganic, metal-organ Vol.39 No.5
<P> Colloidal titania particles with nanosize size distribution were prepared via sol-gel process by using oxo-titanium alkoxide as a molecular precursor. The transformation from oxo-titanium alkoxide to metal oxide was studied by IR, UV, thermal analysis, X-ray and TEM. TEM and XRD techniques were used to characterize the microstructure and crystallite morphology. The experimental results show that the titania has a good crystallinity with a particle size (5 nm), shape and with favorable surface morphology. These results support that titania has strong implications for the interaction between the oleic acid used as surfactant and Ti nanoparticle to enhance the stability with controlled functional properties.</P>