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通过磁控溅射法在Ti O2薄膜上生长Cu-Cu2O复合层,从而制备新型Cu-Cu2O/Ti O2双层纳米复合薄膜。并采用X射线衍射(XRD),扫描电子显微镜(SEM),荧光光谱(PL),X射线光电子能谱(XPS)和紫外可见漫反射光谱(DRS)等方法对膜的结构,形态和光学性能进行了研究。X射线衍射谱表明,Cu-Cu2O混合物层和Cu2O层都没有影响Ti O2的结晶相。XPS结果表明,Cu的存在抑制了Cu2O表面在空气中的氧化。SEM分析表明,结晶良好的Cu-Cu2O混合物微小纳米颗粒均匀分散于Ti O2表面。由于紫外可见漫反射光谱的Cu-Cu2O/Ti O2复合薄膜的吸收边发生红移。PL光谱证实了在Cu的存在下,激发电子和空穴的复合率降低。光催化实验表明,与纯Cu2O/Ti O2相比,所制备的Cu-Cu2O/Ti O2-8显示出更高的光生载流子效率,其光催化性能也显著提高。此外,还对Cu-Cu2O/Ti O2-8光催化活性增强的原因进行了讨论。
Cu-Cu2O composite layer was grown on Ti O2 thin film by magnetron sputtering method to prepare a novel Cu-Cu2O / Ti O2 double-layered nanocomposite film. The structure, morphology and optical properties of the films were characterized by XRD, SEM, PL, XPS and DRS. Were studied. X-ray diffraction analysis showed that neither the Cu-Cu2O layer nor the Cu2O layer affected the crystalline phase of Ti O2. XPS results show that the presence of Cu inhibits the oxidation of Cu2O in air. SEM analysis showed that the well-crystallized Cu-Cu2O mixture of fine nano-particles uniformly dispersed in the Ti O2 surface. Red shift occurs due to the absorption edge of the Cu-Cu2O / Ti O2 composite film in the UV-visible diffuse reflectance spectrum. The PL spectrum confirmed the decrease in the recombination rate of excited electrons and holes in the presence of Cu. Photocatalytic experiments show that compared with pure Cu2O / Ti O2, the prepared Cu-Cu2O / Ti O2-8 exhibits higher photocarrier efficiency and a significantly higher photocatalytic performance. In addition, the reasons for the enhanced photocatalytic activity of Cu-Cu2O / Ti O2-8 are also discussed.