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TiO2具有无毒、物理化学性质稳定、廉价易得及光催化活性高等优点,已广泛应用于光催化和太阳能电池等领域。目前,研究和使用的TiO2多为粉体,虽然光催化活性很高,但悬浮体系光利用效率低、反应后催化剂难回收循环使用。固定化TiO2薄膜可以改善TiO2的光催化效率并易于重复使用。对纳米TiO2薄膜的固定化技术,包括溶胶-凝胶法、化学气相沉积法、液相沉积法、溅射法、电化学等方法进行了综述,并对以上技术的优缺点进行了分析。
TiO2 has the advantages of non-toxic, stable physical and chemical properties, low cost and high photocatalytic activity, and has been widely used in the fields of photocatalysis and solar cells. At present, most of the TiO2 studied and used are powders. Although the photocatalytic activity is high, the light utilization efficiency of the suspension system is low, and the catalyst is difficult to recycle after the reaction. Immobilized TiO2 film can improve the photocatalytic efficiency of TiO2 and can be easily reused. The immobilization technology of nano-TiO2 film, including sol-gel method, chemical vapor deposition method, liquid deposition method, sputtering method and electrochemical method, is reviewed. The advantages and disadvantages of the above techniques are also analyzed.