WO3修饰TiO2纳米管阵列制备、表征及光催化活性(英文)

Preparation, Characterization and Photocatalytic Activity of Titania Nanotube Arrays Decorated with Tungsten Trioxide

利用化学浴沉积（CBD）结合热解工艺制备了WO3修饰TiO2纳米管（WTN）阵列,且WTN阵列分布均匀。通过改变沉积时间可调整WTN的钨含量。利用SEM、EDX、XRD对WTN进行了表征。结果表明,阴极氧化后,TiO2纳米管生长于钛体基体上,纳米管的内径为90120 nm,外径为120160 nm,壁厚在3060 nm范围,长约39μm。经C.I.硫化红14的有效去除证实,修饰TiO2纳米管的WO3增强了WTN光催化活性,在可见光照射下,所制备复合膜光催化活性优于未修饰纳米管阵列（TN）。

Titania nanotube arrays decorated with WO3（WTN） were fabricated by a chemical bath deposition（CBD） technique in combination with a pyrolysis process. The products were uniform and the amount of tungsten can be easily adjusted by the deposition time. The resultant hybrid nanotubes arrays were characterized by SEM, EDX and XRD. Results show that titania nanotubes with an internal diameter of the tubes 90120 nm, an external diameter 120160 nm, wall thickness in the range of 3060 nm and a length of 39 μm are grown on titanium substrate by anodizing. The tungsten trioxide is i decorated on the titania nanotubes, which enhances the photocatalytic activity of the WTN, as indicated by the efficient removal of C.I. Sulphur Red 14. The resultant composite films show better photocatalytic activity than the non-decorated nanotube arrays（TN） under visible light illumination.