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利用溶胶-凝胶法和浸渍-提拉法于载玻片表面沉积了TiO2纳米薄膜,然后通过化学氧化法得到了聚苯胺/TiO2纳米复合膜。借助XRD、AFM、UV-Vis、XPS等方法对复合膜进行了表征。结果表明,所得TiO2薄膜由规则立方体外形的纳米TiO2组成,颗粒直径为20nm。包覆后所得聚苯胺/TiO2复合膜由不规则球形颗粒组成,颗粒直径增大为35nm。薄膜的UV-Vis光谱分析表明,聚苯胺/TiO2复合膜的吸收带边约为390nm,对可见光的吸收显著增强。XPS分析结果表明,复合膜中N+/N之比高达0.63,高于块体聚苯胺的0.57和理想的本征态盐中的0.5,表明掺杂程度高。
TiO2 thin films were deposited on glass slides by sol-gel method and dip-pull method, and then polyaniline / TiO2 nanocomposite films were obtained by chemical oxidation. The composite films were characterized by means of XRD, AFM, UV-Vis and XPS. The results show that the obtained TiO2 thin film consists of regular cube-shaped nano-TiO2 with particle diameter of 20 nm. After the coating obtained polyaniline / TiO2 composite film consists of irregular spherical particles, the particle diameter increased to 35nm. UV-Vis spectral analysis of the film showed that the polyaniline / TiO2 composite film absorption band edge of about 390nm, the visible light absorption increased significantly. XPS analysis showed that the ratio of N + / N in the composite film was as high as 0.63, 0.57 higher than bulk polyaniline and 0.5 in the ideal eigenstate salt, indicating a high degree of doping.