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Facet-controlled synthesis and facet-dependent photocatalytic properties of SnO2 micropolyhedrons.
- Source :
-
Applied Surface Science . Sep2015, Vol. 349, p798-804. 7p. - Publication Year :
- 2015
-
Abstract
- The facet-dependent properties of SnO 2 are of fundamental and practical importance. In this study, by adjusting the deposition temperature during chemical vapor deposition, octahedral SnO 2 with the exposed (1 0 1) facet and two other kinds of SnO 2 polyhedrons with (1 0 1) and (1 0 0) facets with different ratios are fabricated controllably based on the vapor–solid growth mechanism. A slight increase in the deposition temperature from 1030 to 1070 °C decreases the surface energy of the reduced (1 0 1) facet with Sn termination, leading to the formation of polyhedrons with different area ratios of (1 0 1) to (1 0 0) facets. By adopting the terephthalic acid fluorescent method, the SnO 2 octahedrons are demonstrated to have the strongest photocatalytic activity due to the formation of surface states induced by 5s electrons of bivalent Sn on the (1 0 1) surface. The results reveal that the photocatalytic properties of SnO 2 microcrystals can be enhanced by facet-controlled synthesis. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 349
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 103552090
- Full Text :
- https://doi.org/10.1016/j.apsusc.2015.05.069