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Outline
Pure titanate nanotubes and titanate nanotubes doped with Eu3+ ions were synthesized by hydrothermal method. In this process, the preparation of nanotubes is synchronously finished by doping with Eu3+ ions. The morphology, structure, thermal stability and luminescence property of titanate nanotubes were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), and photoluminescence instrument. The results show that the method is simple, stable and high-yield. The structure of the nanotube could be approximately indexed by (H, Na)2Ti3O7 or (H, Na)2(Ti, Eu)3O7. Treatment of high temperature will bring into big changes to structures of titanate nanotubes. When the calcine temperature is higher than 450 ℃, tubulous structure of titanate nanotube was destroyed and transformed into structure of anatase phase. Sample of TNT-Eu shows strong luminescence property. There exist three peaks (393.5 nm, 593 nm, 614 nm) in its luminescence spectrum which are associated to 5D0-7F1 and 5D0-7F2 Eu3+ electronic transition respectively.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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