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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。
Using carbon nanotubes as a template, uniform TiO2: Eu3 + nanotubes were successfully synthesized by solvothermal method without using any surfactants or catalysts. X-ray diffraction results show that the product is a pure anatase phase of TiO2. Scanning electron microscopy and transmission electron microscopy images show that the resulting TiO2: Eu3 + nanotubes are uniform in size and distribution, with a wall thickness of about 8 nm. The possible formation mechanism of the nanotube is proposed. Luminescence spectra show that the TiO2: Eu3 + nanotubes emit red light at 612 nm due to the conversion between 5D0 → 7F2. In addition, because of the ease of preparation and low cost, this synthetic route is also expected to be used to prepare other one-dimensional inorganic nanomaterials.