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Synthesis, characterization and photocatalytic properties of CaNb2O6 nanostructure

In-Sun Cho 1Shin-Tae Bae 1Dong Wook Kim 1Chin Moo Cho 1Dong Hoe Kim 1Hyun Suk Jung 2Kug Sun Hong 1

1. Seoul National University, Department of Materials Science and Engineering (MSE, SNU), San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-744, Korea, South
2. Kookmin University, School of Advanced Materials Engineering, Seoul 136-702, Korea, South


2D ellipsoid-like nanoplates of calcium niobates (CaNb2O6) were synthesized by controlling the reaction conditions, such as the pH, reaction time and temperature, via hyrothermal route without any surfactants or templates. The prepared powders were characterized using X-ray diffractometer (XRD), scanning electron microscopy (SEM), Transmission electron microscopy (TEM), Raman spectroscopy and UV-Vis spectroscopy. It was found that the nanoplates consisted of uniaxially aligned nanorods and can absorb the UV light with wavelengths less than 350 nm. Compared with a powder of the same material prepared by a solid-state reaction method, the 2D ellipsoid-like nanoplates exhibited a much higher photocatalytic activity for degradation of Rhodamine B dye solution under UV irradiation. The enhanced photocatalytic activity of the nanoplates was assigned to both higher optical absorption ability and higher BET surface area resulted from the reduced dimensionality.


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Presentation: Poster at E-MRS Fall Meeting 2008, Symposium D, by In-Sun Cho
See On-line Journal of E-MRS Fall Meeting 2008

Submitted: 2008-05-19 17:49
Revised:   2009-06-07 00:48