由TiO2反胶束溶胶制备一系列TiO2纳米晶薄膜,对膜的吸收光谱和激发发射光谱研究表明制备的膜存在有二种模式的跃迁,直接跃迁和间接跃迁。由于厚膜中存在较强的表面相互作用,厚膜的直接跃迁禁带宽与薄膜相比发生了红移。在不同陈化时间,浸渍相同次数制得的膜具有相同的直接跃迁禁带宽。除浸渍一次的膜不存在间接跃迁外,所有的膜具有相同的间接跃迁禁带宽。所有的膜具有几乎相同的发射光谱模式。 A series of TiO2 nanocrystalline films were prepared from TiO2 reverse micellar sols. The absorption and excitation emission spectra of the films showed that there were two modes of transition, direct transition and indirect transition. Due to the strong surface interaction in the thick film, the direct transition of the thick film has a red shift compared with the film. Films made at the same aging times with the same number of impregnations have the same direct transition bandgap. All films have the same indirect transition bandgap, except that the membrane does not have an indirect transition. All films have almost the same emission spectrum pattern.