Photocatalytic activities of Sr sub(2Ta) sub(2)O sub(7 nanosheets synthesized by a hydrothermal method)

Sr sub(2Ta) sub(2)O sub(7 nanosheets have been synthesized by a hydrothermal method without using any template. The thickness, widths, and lengths of Sr) sub(2)Ta sub(2O) sub(7) nanosheets are about 10-50 nm, 50-150 nm, and 500 nm, respectively. The optimum conditions for the formation of the nanosh...

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Bibliographic Details
Published in:International journal of hydrogen energy 2009-03, Vol.34 (5), p.2113-2120
Main Authors: Zhou, Chao, Chen, Gang, Li, Yingxuan, Zhang, Hongjie, Pei, Jian
Format: Article
Language:English
Subjects:
Bulk sampling
Nanocomposites
Nanomaterials
Nanostructure
Optimization
Photocatalysis
Surface area
Water splitting
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Summary:Sr sub(2Ta) sub(2)O sub(7 nanosheets have been synthesized by a hydrothermal method without using any template. The thickness, widths, and lengths of Sr) sub(2)Ta sub(2O) sub(7) nanosheets are about 10-50 nm, 50-150 nm, and 500 nm, respectively. The optimum conditions for the formation of the nanosheets are maintaining the reactants at 260 degree C for 7 days. On basis of the experimental data, a possible formation mechanism of the nanosheets under the hydrothermal conditions was proposed. The photocatalytic activity for water splitting was investigated under ultraviolet irradiation. It has been found that Sr sub(2Ta) sub(2)O sub(7 nanosheets, compared to the bulk Sr) sub(2)Ta sub(2O) sub(7) sample, showed a higher photocatalytic activity even in the absence of a cocatalyst. The higher activity of the hydrothermally synthesized sample is attributed to its larger surface areas and nanoscale structure.
ISSN:0360-3199
DOI:10.1016/j.ijhydene.2008.12.074