Journal
SMALL
Volume 9, Issue 14, Pages 2452-2459Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201300841
Keywords
TiO2; single crystals; bipyramids; photocatalysts; hydrogen production
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Funding
- National Natural Science Foundation of China [91123003, 21005023]
- National Basic Research Program of China [2011CB933401]
- Knowledge Innovation Program of the Chinese Academy of Sciences
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Diverse titanium dioxide (TiO2) nanostructures have attracted much attention recently due to their potential application in photocatalytic and photovoltaic fields. Here, the synthesis of a TiO2 single crystal with a novel four-truncated-bipyramid morphology is reported for the first time, produced by a simple hydrothermal method. Both peroxo titanic acid precursor and hydrofluoric acid capping agent are essential for the formation of this unique morphology. Moreover, the as-prepared TiO2 photocatalyst exhibits excellent hydrogen production activity from an ethanol-water solution, which is attributed to exposure of both high-energy {001} oxidative and low-energy {101} reductive facets in an optimal ratio. The current findings will contribute greatly to development of more novel photocatalysts with controllable microscopic structures for hydrogen production.
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