Facet-controlled synthesis and facet-dependent photocatalytic properties of SnO2 micropolyhedrons

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Gengxia Zhou
  • Xinglong Wu
  • Lizhe Liu
  • Xiaobin Zhu
  • Xiaoshu Zhu
  • Yanling Hao

Detail(s)

Original languageEnglish
Pages (from-to)798-804
Journal / PublicationApplied Surface Science
Volume349
Early online date16 May 2015
Publication statusPublished - 15 Sep 2015

Abstract

The facet-dependent properties of SnO2 are of fundamental and practical importance. In this study, by adjusting the deposition temperature during chemical vapor deposition, octahedral SnO2 with the exposed (1 0 1) facet and two other kinds of SnO2 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 SnO2 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 SnO2 microcrystals can be enhanced by facet-controlled synthesis.

Research Area(s)

  • Photocatalytic activity, SnO<inf>2</inf> polyhedron, Surface states

Citation Format(s)

Facet-controlled synthesis and facet-dependent photocatalytic properties of SnO2 micropolyhedrons. / Zhou, Gengxia; Wu, Xinglong; Liu, Lizhe; Zhu, Xiaobin; Zhu, Xiaoshu; Hao, Yanling; Chu, Paul K.

In: Applied Surface Science, Vol. 349, 15.09.2015, p. 798-804.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review