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Morphology-Tuned Phase Transitions of Anatase TiO2 Nanowires under High Pressure
Li, QJ; Cheng, BY; Yang, X; Liu, R; Liu, B; Liu, J; Chen, ZC; Zou, B; Cui, T; Liu, BB;刘景
2013
发表期刊JOURNAL OF PHYSICAL CHEMISTRY C
卷号117期号:16页码:8516-8521
摘要The phase transitions of one-dimensional (1D) anatase TiO2 nanowires were studied by in situ high-pressure synchrotron X-ray diffraction and Raman scattering up to 37 GPa. A direct anatase-to-baddeleyite transformation was observed at similar to 9 GPa, which is clearly different from the size-dependent phase transition behaviors for nanocrystalline TiO2. We found the higher compressibility in the c-axis compared to the a-axis for anatase nanowires that may be attributed to both the crystal structural feature and the growth direction of the nanowires. The Ti-O bonds show abnormal changes during the anatase-to-baddeleyite phase transition. This phase transition of the TiO2 nanowires shows obvious morphology-tuned behaviors. Upon decompression, the baddeleyite phase transformed into alpha-PbO2 phase. The morphology of the TiO2 nanowires shows excellent stability and TiO2 nanowires with alpha-PbO2 phase were obtained at ambient conditions through a compression-decompression cycle. These results indicate that the nanoscale quasi-1D structure of TiO2 nanowires may contribute to the high-pressure phase transitions showing unique morphology-tuned behaviors.
学科领域Chemistry; Science & Technology - Other Topics; Materials Science
DOI10.1021/jp4004196
收录类别SCI
WOS记录号WOS:000318211200067
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被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224310
专题多学科研究中心
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Li, QJ,Cheng, BY,Yang, X,et al. Morphology-Tuned Phase Transitions of Anatase TiO2 Nanowires under High Pressure[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2013,117(16):8516-8521.
APA Li, QJ.,Cheng, BY.,Yang, X.,Liu, R.,Liu, B.,...&Liu, BB;刘景.(2013).Morphology-Tuned Phase Transitions of Anatase TiO2 Nanowires under High Pressure.JOURNAL OF PHYSICAL CHEMISTRY C,117(16),8516-8521.
MLA Li, QJ,et al."Morphology-Tuned Phase Transitions of Anatase TiO2 Nanowires under High Pressure".JOURNAL OF PHYSICAL CHEMISTRY C 117.16(2013):8516-8521.
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