Gd3+掺杂TiO2纳米管的制备及性能研究

Preparation and Properties of Gd3+ Doped TiO2 Nanotubes

本文以钛酸四丁酯为前躯体,结合溶胶-凝胶法和水热法,制备了Gd^3+掺杂的TiO2纳米管。采用TG-DSC、XRD、TEM、UV-Vis等分析手段,对Gd^3+掺杂的TiO2纳米管进行表征,比较了制备条件相同的情况下纯TiO2纳米管与Gd^3+掺杂的TiO2纳米管晶型转变温度、形貌及UV-Vis吸收差别。结果表明,Gd^3+的掺杂有利于晶型转变的降低,管径的减小,管长的增长。UV-Vis吸收光谱表明掺杂后的产物的反射率明显的比纯TiO2纳米管的反射率减小,可见光区吸收增强,吸收边发生了明显的红移。

Gd^3+doped TiO2 nanotubes were prepared by using tetrabutyl titanate as precursor and sol-gel method and hydrothermal method.The Gd^3+doped TiO2 nanotubes were characterized by TG-DSC,XRD,TEM and UV-Vis.The crystal transition temperatures,morphology and UV-Vis absorption difference of pure TiO2 nanotubes and Gd^3+doped TiO2 nanotubes were compared under the same preparation conditions.The results show that the doping of Gd^3+is beneficial to the reduction of crystal transformation,the decrease of tube diameter and the growth of tube length.The UV-Vis absorption spectrum shows that the reflectivity of the doped product is significantly lower than that of the pure TiO2 nanotube,the absorption in the visible region is enhanced,and the absorption edge is significantly red-shifted.