水热法CdS纳米线的制备与表征

Preparation and Characterization of CdS Nanowires by Hydrothermal Method

摘要: CdS具有光吸收系数大与制备工艺简单等优点，可用于制光电探测器、太阳能电池等领域。尽管CdS纳米线的制备和应用已经在很多领域取得了进展，而对于通过低成本方式生长高质量的晶体结构还有很大进步空间。本文通过水热法制备了质量较高的CdS纳米线，研究以不同的硫源及反应时间制备得到了CdS纳米线，并利用拉曼光谱、光致荧光光谱(PL)、光学显微镜和扫描电子显微镜(SEM)表征测试技术对所制备的CdS纳米线进行了表征，实验结果表明，水热过程中，不同硫源与Cd²⁺及乙二胺的作用方式不同，所制备的CdS纳米线长度有所不同。表现为当硫源为硫粉时CdS纳米线形貌明显清晰，长度增加。而在反应时间方面，随着保温时间的增加纳米线有接合生长的趋势，表现为随着反应时间增加CdS纳米线长度明显增长。

Abstract: CdS has the advantages of large light absorption coefficient and simple preparation process, which can be used for making photodetectors, solar cells and other fields. Although the preparation and application of CdS nanowires have progressed in many fields, there is still much room for progress in the growth of high-quality crystal structures by low-cost methods. In this paper, high quality CdS nanowires were prepared by hydrothermal method, and the study obtained CdS nanowires prepared with different sulfur sources and reaction time, and the prepared CdS nanowires were characterized using Raman spectroscopy, photoluminescence spectroscopy (PL), optical microscopy and scanning electron microscopy (SEM) characterization test techniques, and the experimental results showed that the hydrothermal process of different sulfur sources with the experimental results showed that the lengths of the prepared CdS nanowires differed between different sulfur sources and Cd2+ and ethylenediamine in the hydrothermal process. The length of the CdS nanowires increased when the sulfur source was sulfur powder. As for the reaction time, there was a tendency of joint growth with the increase of holding time, which showed that the length of CdS nanowires increased significantly with the increase of reaction time.