A Cu2O/ZnO composite film was prepared by synthesizing a Cu2O film with single preferred orientation (111) on a porous ZnO film through successive cathodic electrodeposition with conductive glass (FTO) as substrate. The structure and morphology of the films were characterized by X-ray diffraction and scanning electron microscopy, respectively. The photoabsorption spectrum indicated that the photoabsorption capability of the composite film is good in range of visible light. Test of visible light-catalyzed degradation of rhodamine B showed that the Cu2O/ZnO composite film has a better photocatalytic activity than the single Cu2O film due to the fact that there exists charge transfer at the contact interface of the two semiconductors. The degradation rate of rhodamine B is up to 70% after reaction for 2.5 h for the Cu2O/ZnO film, but only 60% for the single Cu2O film under the same conditions.%以导电玻璃(FTO)为基底,采用连续阴极电沉积方法在多孔结构的ZnO薄膜上合成具有单一(111)择优取向的Cu2O,制备了Cu2O/ZnO复合薄膜.采用X射线衍射和扫描电镜分别对薄膜的结构及形貌进行了表征.光吸收谱显示复合薄膜在可见光范围内具有较好的光吸收性能.可见光催化降解罗丹明B的实验表明,由于在两半导体接触界面上发生了电荷的转移,Cu2O/ZnO复合薄膜比单一的Cu2O薄膜具有更高的光催化活性,在2.5 h内对罗丹明B的降解率可达到70％,而在相同条件下Cu2O薄膜的降解率仅为60％.
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