摘要：在溶胶-凝胶法制备的 TiO₂ 胶膜表面涂覆金属离子，通过焙烧制 备 TiO₂-Fe₂O₃-CeO₂ 复合纳米薄膜。 以甲基橙为目标降解物，讨论过渡 金属离子 Fe³⁺和稀土金属离子 Ce³⁺的掺杂对 TiO₂ 薄膜光催化活性的影 响。 采用 SEM、XRD、EDS 等表征手段对复合氧化物薄膜进行表征。 结 果表明： 所制备的薄膜具有纳米结构；Fe³⁺、Ce³⁺单掺和 Fe³⁺/Ce³⁺共掺均 可提高 TiO₂ 薄膜的光催化性能，但相同条件下共掺离子的光催化活性 更高。 

关键词：溶胶-凝胶；复合纳米薄膜；光催化性能

Abstract：The metal ions were coated on TiO₂ colloidal films prepared by sol－gel method，and a sintering process was adopted to make composite TiO₂－Fe₂O₃－CeO₂ nano-films. Taking methyl orange as degraded，it was aimed to discuss the effect of transition metal ion Fe³⁺ and rare earth ion Ce³⁺ on photo-catalytic activity of TiO₂ thin films. SEM，XRD and EDS were used to characterize the composite oxide-films. The experiment re sults showed that the film had nano-structure. The co-doped Fe³⁺ and Ce⁴⁺composite TiO₂ films were more effective than the pure TiO₂，doped Fe³⁺ or doped Ce⁴⁺ films to photo-degradation methyl orange in solution. 

Keywords：sol－gel；composite nano-films；photo-catalysis