本研究采用阳极氧化法在金属钛箔上制备TiO2纳米管阵列,并用直流电沉积在退火后的TiO2纳米管内部填充CdS.用扫描电子显微镜(SEM)及电子能谱(EDS)、X射线衍射(XRD)对TiO2/CdS异质结进行表征,结果显示,TiO2/CdS同轴核壳结构有序规整排列,孔径大小均一,Cd、S两种元素化学配比接近1∶1.450℃空气退火后的TiO2是锐钛矿型,沉积的CdS为六方相.对TiO2纳米管和TiO2/CdS异质结分别进行了紫外-可见吸收光谱和紫外光下光催化降解甲基橙染料的性能测试.结果表明,复合后TiO2的吸收边出现了明显的红移；TiO2/CdS催化降解甲基橙的降解率最高达99.4％,与纯TiO2相比TiO2/CdS的光催化活性明显提高.
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