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Issue 43, 2015
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Solid-state chemistry of glassy antimony oxides

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Abstract

The amorphous phases of antimony oxide at three different oxidation levels have been investigated by ab initio molecular-dynamics calculations using a simulated ‘melt-quench’ approach. The atomic and electronic structures of the amorphous phases are analyzed and compared to their crystalline counterparts. The amorphous structure of the trioxide (a-Sb2O3) resembles the β-phase of the crystalline form (valentinite), in agreement with previous observations. In the relaxed athermal structure, however, more senarmontite-like structural features are apparent. The phase diagram of the amorphous phases with respect to the oxygen chemical potential has been calculated within the framework of ab initio thermodynamics. At elevated oxidation levels, the resulting tetraoxide and pentoxide materials show distinct variation in electronic structure compared to the trioxide, with the electronic density of states indicating a narrowing of the electronic gap with increasing oxidation level.

Graphical abstract: Solid-state chemistry of glassy antimony oxides

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Supplementary files

Article information


Submitted
19 Jul 2015
Accepted
27 Sep 2015
First published
29 Sep 2015

J. Mater. Chem. C, 2015,3, 11349-11356
Article type
Paper
Author version available

Solid-state chemistry of glassy antimony oxides

C. Kim, J. M. Skelton, A. Walsh and A. Soon, J. Mater. Chem. C, 2015, 3, 11349
DOI: 10.1039/C5TC02191J

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