| 光谱学与光谱分析 |
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| Effect of Thermal Treatment of Nanotubed H2Ti2O4(OH)2 on Photoluminescence Properties |
| LI Qiu-ye, JIN Zhen-sheng*, ZHANG Shun-li, TIAN Bao-li, ZHANG Zhi-jun |
| Lab of Special Functional Materials，Henan University，Kaifeng 475001, China |
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Abstract The effect of thermal treatment (100 ℃，-0.1 MPa) of nanotubed H2Ti2O4(OH)2 on photoluminescence properties was investigated. The results showed that the photoluminescence intensity of dehydrated nanotubed H2Ti2O4(OH)2 increases with the treatment time(t) when t≤23 h, and decreases when t＞23 h, which is different from the changes in ESR intensity and absorption with t. It can be explained as follows：When the concentration of single-electron trapped oxygen vacancies(V·O) generated from dehydration reaches a threshold value, strong interaction will take place between the adjacent V·O. This will result in decreasing the probability of photoluminescence emission, and increasing the probability of nonradiative transition. So the photoluminescence intensity of dehydrated nanotubed H2Ti2O4(OH)2 is enhanced first, and then decreases.
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Received: 2004-11-08
Accepted: 2005-03-23
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Corresponding Authors:
JIN Zhen-sheng
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| Cite this article: |
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LI Qiu-ye,JIN Zhen-sheng,ZHANG Shun-li, et al. Effect of Thermal Treatment of Nanotubed H2Ti2O4(OH)2 on Photoluminescence Properties[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(12): 2044-2047.
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https://www.gpxygpfx.com/EN/Y2005/V25/I12/2044 |
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