Journal
NANO RESEARCH
Volume 9, Issue 5, Pages 1523-1531Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-016-1048-3
Keywords
polyhedron perovskite; strontium titanate; active faces; photocatalysis
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Funding
- National Natural Science Foundation of China [51472226]
- Chinese Academy of Inspection and Quarantine [2014JK005, 2014JK006]
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Cubic-perovskite (SrTiO3) has a great potential to be utilized in a wide range of applications. However, currently very little is known about the shape and facet effects of SrTiO3 on their physicochemical properties. This is largely owing to the difficulties in controlling the morphology of facets during synthesis. Herein, we describe a facile route for the facet- and size-controlled fabrication of singlecrystalline SrTiO3 triangular prisms with highly exposed {101} side faces and {111} end faces. Theoretical and experimental studies of their photocatalytic performance have shown that triangular prisms exhibit superior photocatalytic activities than nanocubes with exposed (001) faces for the degradation of organic contaminants, which may be primarily attributed to the much higher surface energy of {101} facets (2.97 J/m(2)) and {111} facets (2.80 J/m(2)) than of that of {001} facets (0.98 J/m(2)).
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