Synthesis, characterization and photocatalytic properties of lithium tantalate

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• 作者：Beata Zieli¨½ska ; ^{bzielinska@zut.edu.pl} ; Ewa Mijowska ; Ryszard J. Kalenczuk
• 关键词：Lithium tantalate ; Phase composition ; Photocatalysis ; Hydrogen generation
• 刊名：Materials Characterization
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：68
• 期：Complete
• 页码：71-76
• 全文大小：845 K

文摘

Lithium tantalate (LiTaO₃) was successfully synthesized thorough an impregnation method of tantalum pentaoxide in the aqueous solution of lithium hydroxide. Next, the sample was divided into eight batches and calcinated in a temperature range of 450-800 ¡ãC. The materials produced were then characterized by X-ray diffraction, Raman spectroscopy, Diffuse Reflectance (DR) UV-vis spectroscopy, BET analysis, and high resolution transmission electron microscopy. Moreover, the samples were tested as photocatalysts in a reaction of hydrogen generation. Interestingly, it was found that the sample calcinated at 550 ¡ãC exhibits the highest photocatalytic activity. This sample is composed of 85 % of LiTaO₃ and 15 % of Ta₂O₅.