以异丙醇钛(C12H28O4Ti)为主要原料合成氧化钛(TiO2)前驱体溶胶,并结合230℃水热处理得到TiO2溶胶,利用电流体动力学(EHD)技术在掺氟氧化锡导电(FTO)玻璃基片上镀膜,450℃高温煅烧制备具有多级结构锐钛矿TiO2纳米薄膜.以硝酸银(AgNO3)及硫化钠(Na2S)分别为银源和硫源,采用化学浴沉积技术在TiO2薄膜上沉积制备了纳米硫化银敏化的异质复合薄膜.采用X射线衍射(XRD)、电子扫描电镜(SEM)、电子透射电镜(TEM)、紫外-可见吸收光谱(UV-vis absorbance spectra)对薄膜结构和性能进行表征,并对制备的复合薄膜组装光电化学电池进行了光电性能测试.结果表明,纳米TiO2薄膜具有亚微米球簇堆积结构,球簇之间形成尺寸连续分布的微纳通道.异质复合薄膜中硫化银以尺寸为3-5nm范围内纳米颗粒形式存在.UV-vis absorbance spectra证实量子点的量子限域效应.光电化学性能测试表明,该复合薄膜具有光电响应特性,但光电性能信号随时间发生衰减现象.
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