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Issue 17, 2012
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Crystallographic phase evolution of ternary Zn–Ti–O nanomaterials during high-temperature annealing of ZnO–TiO2 nanocomposites

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Abstract

This study investigates the phase evolution of ternary Zn–Ti–O nanomaterials by high-temperature annealing of ZnO–TiO2 core shell nanowires at 800 °C–1000 °C. Scanning electron microscopy images show the surface morphology of the nanowires becomes rough with an increase in annealing temperature. Moreover, X-ray diffraction (XRD) patterns and transmittance electron microscopy (TEM) analysis show that multiple Zn–Ti–O ternary compounds exist in the high-temperature annealed ZnO–TiO2 nanocomposites. These are Zn2TiO4 and ZnTiO3. The nanowires annealed at 800 °C form hexagonal ZnTiO3 and cubic Zn2TiO4 mixed phases. When the annealing temperature reaches 1000 °C, a pure and efficient crystalline Zn2TiO4 phase is obtained in the nanowires. The experimental results herein demonstrate that the annealing temperature is a substantial factor dominating the phase evolution of Zn–Ti–O ternary compounds in the solid-state reaction between the ZnO core and TiO2 shell nanolayers.

Graphical abstract: Crystallographic phase evolution of ternary Zn–Ti–O nanomaterials during high-temperature annealing of ZnO–TiO2 nanocomposites

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Publication details

The article was received on 11 Mar 2012, accepted on 23 May 2012 and first published on 23 May 2012


Article type: Paper
DOI: 10.1039/C2CE25347J
Citation: CrystEngComm, 2012,14, 5579-5584
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    Crystallographic phase evolution of ternary Zn–Ti–O nanomaterials during high-temperature annealing of ZnO–TiO2 nanocomposites

    Y. Liang, C. Hu and Y. Liang, CrystEngComm, 2012, 14, 5579
    DOI: 10.1039/C2CE25347J

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