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Synthesis of Pyrochlore-Type K2Ta2O6 with High Photocatalytic Activity for Dye Degradation

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Abstract:

Pyrochlore-type potassium tantalate (K2Ta2O6 ) was successfully synthesized through a facile hydrothermal method. X-Ray diffraction and electron microscopy reveal that pure K2Ta2O6 consisting of a nanooctahedral structure could be obtained at 180°C for 24 h. The photocatalytic activities of K2Ta2O6 were examined using aqueous solutions under ultraviolet irradiation. The degradation result of the Rhodamine B dye indicated that the pyrochlore-type potassium tantalates exhibited a remarkably higher photocatalytic activity than the perovskite phase sample. This high photocatalytic activity is ascribed to both the high position of the conduction band and the high separation efficiency of electron-hole pairs of the pyrochlore structure.

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Periodical:

Key Engineering Materials (Volume 680)

Pages:

203-207

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.680.203

Citation:

Cite this paper

Online since:

February 2016

Authors:

Ting Ting Ma, Rui Shen Zhou, Xia Li*

Keywords:

Hydrothermal Method, K2Ta2O6, Photocatalyst, Pyrochlore-Type

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* - Corresponding Author

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