自掺杂二氧化钛薄膜的结构、光谱和光催化性能（英文）

Structure, Spectral and Photocatalytic Properties of Self-Doped TiO2-x Thin Films

采用电子束蒸发系统制备氧化钛薄膜并分别在氢气和空气中退火,在氢气中退火的样品由于其稳定性强,能在空气中保持淡黄色将近一年。对氧化钛薄膜的结构,形貌,光谱和光催化性能进行详细讨论。结果表明,在氢气中退火的薄膜比在空气中退火的薄膜具有更好的光催化性能,氢气中退火的样品通过Ti3+掺杂能很好地调控电子结构从而提高光催化效率。Ti3+的存在缩小了带隙。

The titanium dioxide thin films(TTFs) were prepared by the electron beam evaporation system and annealed in air and H2. With excellent stability, samples annealed in H2 maintain their pale yellow in the air for nearly one year. The structure, morphology, spectral and photocatalytic properties of TTFs were observed and discussed. The results show that titanium oxide films annealed in H2 have better catalytic performance than those annealed in air. Ti3+ can improve photocatalytic efficiency since the electronic structures of TTFs annealed in H2 can be finely tuned by the doped Ti3+. The existence of Ti3+ induces an electronic band below the conduction band and narrows the band gap.