模板合成法制备TiO2:Eu3+纳米管及其发光特性研究

以碳纳米管做模板，在不利用任何表面活性剂或催化剂情况下，通过溶剂热法成功合成均匀的TiO2:Eu3+纳米管。X射线衍射结果表明，该产物是TiO2的一种纯锐钛矿相。扫描电子显微镜及透射电子显微镜图像显示，所得到的TiO2:Eu3+纳米管在大小及分布上是均匀的，管壁的厚度约为8nm。提出了该纳米管可能的形成机制。发光光谱表明，由于5D0→7F2间的转换，TiO2:Eu3+纳米管会在612nm发出红光。此外，因为制备容易而且成本较低，这种合成路径还有望用来制备其他的一维无机纳米材料。

Study of template synthesis and luminescence characteristics of TiO2:Eu3+ nanotubes

Uniform TiO2:Eu3+ nanotubes have been successfully synthesized through a simple solvothermal process with carbon nanotubes (CNTs) as templates, free of any surfactant or catalyst. X-ray diffraction (XRD) results demonstrate that the product is a pure anatase phase of TiO2. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images indicate that the as-obtained TiO2:Eu3+ nanotubes are uniform in size and distribution, and the thickness of the wall is about 8 nm. The possible formation mechanism has also been proposed. The luminescent spectrum shows that TiO2:Eu3+ nanotubes exhibit a red emission at 612 nm due to the 5D0-7F2 transition. Furthermore, this synthetic route is promising for the preparation of other one-dimensional inorganic nanomaterials because of its simplicity and the low cost of the starting reagents.