真空离子溅射法制备TiO_2:Au复合纳米纤维新型光催化剂及其降解乙醛性能研究

Use of Ion Sputter Coating to Prepare the Gold Deposited TiO_2 Nanofiber Photocatalyst and the Photocatalytic Degradation of Acetaldehyde

采用静电纺丝技术与真空离子溅射相结合的方法制备了TiO2∶Au复合纳米纤维,并采用SEM和X射线电子能谱仪对其进行了表征.结果表明TiO2∶Au纳米纤维的表面形态能通过Au沉积时间得到很好的控制.同时在紫外光照射下采用乙醛体系考察了TiO2纳米纤维和TiO2∶Au复合纳米纤维催化剂降解乙醛性能,结果证明TiO2∶Au复合纳米纤维具有更好的催化效率,紫外光照射70min后乙醛被完全降解.

The Au-doped titania （TiO2 ： Au） nanofibers were prepared by a combination of an electrospinning method and a sputtering technology, and characterized by scanning electron microscopy and X-ray photoelectron spectroscopy. The results show that the morphologies of Au deposited TiO2 nanofibers can be well controlled by the sputtering time. In addition, the photocatalytic properties of TiO2 nanofibers and TiO2 ： Au nanofibers were investigated by degrading acetaldehyde under UV irradiation. The photodegradation of porous TiO2 ： Au nanofibers exhibited the best photocatalytic efficiency, where 100% acetaldehyde could be decomposed after UV exposure for 70 min.