Abstract
Anatase hierarchical micro/nanostructured TiO2 was successfully prepared by a rapid (10 min) one-pot microwave-assisted hydrothermal method. The nanomorphologies (including the exposed crystal facets) of the as-prepared TiO2 samples could be facilely tuned in the reaction system. The possible formation mechanism of the hierarchical micro/nanostructured TiO2 were discussed in detail, it was found that the chelating role of EDTA could control the slow release of Ti4+-containing species, providing a large space for the controlling of crystallite size and complex nano-morphologies. Moreover, an interesting “crystal facets-dependent photocatalytic selectivity” was found, in which the photocatalytic selectivity could be tuned by modifying the exposed crystal facets of TiO2. With the unique structural properties, the hierarchical micro/nanostructured TiO2 prepared by the present microwave-assisted hydrothermal method might also show potential application in more fields, such as dye-sensitized solar cells, gas sensing and lithium ion batteries, and the present microwave-assisted hydrothermal method could be further used in the rapid synthesis of other inorganic functional nanomaterials with complex hierarchical micro/nanostructures.
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Acknowledgments
This work was supported by Natural Science Foundation of Jiangxi province of China (Grant No. 20151BAB216008), the open fund of Jiangxi Key Laboratory of Nanomaterials and Sensors (Grant Nos. 2015002, 2015004), and the research projects of education department of Jiangxi province (Grant No. 150308).
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Yang, Y., Liang, Y., Hu, J. et al. Rapid microwave-assisted hydrothermal synthesis of hierarchical micro/nanostructured TiO2 with tunable nanomorphologies. J Mater Sci: Mater Electron 27, 11606–11612 (2016). https://doi.org/10.1007/s10854-016-5292-9
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DOI: https://doi.org/10.1007/s10854-016-5292-9