精品文档---下载后可任意编辑CdS 纳米棒及 CdS-TiO2 异质结的制备与光电特性讨论中期报告摘要本文介绍了 CdS 纳米棒及 CdS-TiO2 异质结的制备过程及光电特性，并对其性能进行了初步分析。通过溶液法制备 CdS 纳米棒，并在其表面修饰 TiO2 纳米颗粒，形成 CdS-TiO2 异质结。利用 X 射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)等测试手段对样品进行了表征，发现所制备的 CdS 纳米棒长度大致为 80-100 nm，直径为 20-30 nm，CdS-TiO2 异质结中 TiO2 纳米颗粒大小约为 10 nm，CdS 纳米棒和 TiO2 颗粒之间存在良好的结构匹配。利用紫外-可见吸收光谱分析了样品的光学吸收特性，并讨论了不同条件下的光催化性能。结果表明，CdS-TiO2 异质结在紫外光照射下具有较高的光催化活性，对罗丹明 B 溶液的降解率达到了 85%以上，在可见光照射下的光催化性能相对较差。关键词：CdS 纳米棒；TiO2 纳米颗粒；异质结；光催化性能AbstractThis paper introduces the preparation process and photoelectric properties of CdS nanorods and CdS-TiO2 heterojunction, and analyzes their properties preliminarily. CdS nanorods were prepared by solution method, and TiO2 nanoparticles were modified on their surfaces to form CdS-TiO2 heterojunction. The samples were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and other testing methods. It was found that the length of the prepared CdS nanorods was about 80-100 nm, with a diameter of 20-30 nm, and the size of TiO2 nanoparticles in CdS-TiO2 heterojunction was about 10 nm, and there was a good structural match between CdS nanorods and TiO2 particles.The optical absorption characteristics of the samples were analyzed by UV-visible absorption spectroscopy, and the photocatalytic properties under different conditions were studied. The results showed that CdS-TiO2 heterojunction had high photocatalytic activity under UV light irradiation, and the degradation rate of rhodamine B solution reached more than 精品文档---下载后可任意编辑85%, while the photocatalytic performance under visible light irradiation was relatively poor.Keywords: CdS nanorods; TiO2 nanoparticles; heterojunction; photocatalytic properties
