Nano Archive

TEM microstructure characterization of nano TiO2 coated on nano ZrO2 powders and their photocatalytic activity

Lee, Byong-Taek and Han, Jae-Kil and Gain, Asit Kumar and Lee, Kap-Ho and Saito, Fumio (2006) TEM microstructure characterization of nano TiO2 coated on nano ZrO2 powders and their photocatalytic activity. Materials Letters, 60 (17-18). 2101 - 2104.

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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

Abstract

Nano TiO2 coated commercial nano ZrO2 powders (20 and 80 wt.%) were synthesized by a sol–gel process. Their microstructure and crystal structure depending on the calcination temperatures were investigated using XRD and HRTEM techniques. In the as-received powders, the nano TiO2 particles attached to the ZrO2 particles existed in an amorphous phase. After calcination at 450 and 600 °C, most of the TiO2 powders were crystallized to an anatase type, whereas at 750 °C, they were changed to a rutile phase. From the comparison of photocatalytic activity, the nano TiO2 coated ZrO2 powders calcined at 450 and 600 °C showed excellent efficiency for the removal of methyl orange (MO). However, in the powders calcined at 750 °C, the photocatalytic activity was decreased due to the appearance of a rutile phase.

Item Type:Article
Uncontrolled Keywords:TiO2 nano coating; Methyl orange degradation; Photocatalytic activity; Sol–gel method
Subjects:Material Science > Nanostructured materials
ID Code:6794
Deposited By:SPI
Deposited On:18 Jan 2010 09:57
Last Modified:18 Jan 2010 09:57

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