期刊
CERAMICS INTERNATIONAL
卷 40, 期 4, 页码 5831-5835出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.11.024
关键词
Bismuth tungstate; Squared nanosheets; Hierarchical; Growth mechanism; Alkalescent
资金
- Research Programs of Shanghai Science and Technology Commitee [13NM1401600]
- Shanghai Rising-Star Program (B-type) [12QB1402800]
- National High Technology Research and Development Program of China (863 Program) [2013AA031801]
- Minhang District Science and Technology Project of Shanghai [2012MH017]
The hierarchical Bi2WO6 microstructures, which were two-dimensionally assembled by parallel squared nanosheets, were synthesized under alkalescent hydrothermal treatment. The crystalline phase, morphology, size, lattice plane and crystalline structure of the products were characterized by X-ray diffraction, scanning/transmission electron microscopy and selected area electron diffraction. The formation of parallel squared nanosheet-assembled hierarchical Bi2WO6 microstructures was elucidated by the oriented attachment growth mechanism based on our experimental results. The aqueous ammonia, which was employed as the alkalescent environment, had a critical effect on the formation of such hierarchical Bi2WO6 microstructures with a large proportion of {001} facets. The parallel squared nanosheet-assembled hierarchical Bi2WO6 microstructures obtained at the hydrothermal temperature of 120 degrees C showed high photocatalytic activity under visible-light irradiation. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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