Abstract: Biomimetic Fe-TiO2 films were prepared by the sol gel method using polyethylene glycol (PEG) as a pore direction agent. The thermal decomposition behavior of the gel film was analyzed by TG-DSC. The effect of the gel heat-treatment regime on the morphology，phase and hydrophilicity of the film was investigated by scanning electron microscope，X-ray diffraction and contact goniometer，respectively. The results showed that a constant temperature regime produced a continuous film with well-distributed 2—5 μm spherical pores，while a temperature programming regime formed a well-distributed about 100μm sunflower-like spots on the film surface. Amorphous and anatase films could be obtained by using no ageing precursor sol and aged sol at 80℃ for 8h，respectively. Doping Fe3+ and forming pores could remarkablely increase the hydrophilicity of the TiO2 film. Furthermore，hydrophilicity of the film produced by the constant temperature regime was superior to that of the film produced by the temperature programming regime.

摘要： 实验采用溶胶-凝胶法，以聚乙二醇（PEG）为致孔剂制备了仿生的Fe3+掺杂TiO2（Fe- TiO2）多孔薄膜。应用TG-DSC分析了凝胶薄膜的热分解行为，采用SEM、XRD及接触角测定仪等分析测试手段分别考察了两种热处理方式对形成薄膜的表面形态、相态以及亲水性的影响。结果表明：由恒温方式处理得到的薄膜连续无裂纹，其表面形成了分布均匀的、直径2～5 μm的球面形气孔，而升温方式得到的薄膜其表面形成了分布均匀的、直径约100 μm的葵花状斑块；溶胶不经陈化得到的薄膜为无定形，而经80 ℃、8 h陈化后制备的薄膜为锐钛型；采用Fe3+掺杂及在薄膜表面形成气孔，能显著提高TiO2薄膜的亲水性，并且恒温热处理方式得到的薄膜其亲水性优于升温方式得到的薄膜样品。