优秀毕业论文（设计）_异相硫化镉纳米材料的制备及其光催化性能.docxVIP

摘 要光催化技术为缓解能源危机，解决环境污染提供了一种有效的途径。本实验制备出了一种新型的异相硫化镉光催化材料，并将其应用于印染废水中罗丹明B（RhB）的可见光降解，取得较好效果。主要实验结果如下：以氯化镉和硫代乙酰胺分别作为镉源和硫源，以三乙醇胺和水作为混合溶剂，水热法制备了立方相和六方相复合相硫化镉（h-CdS/c-CdS）半导体纳米材料。采用XRD,TEM,FT-IR等测试表征手段对所制备材料进行了物相分析和形貌测试。结果表明，水热法所制备的h-CdS/c-CdS为CdS两相复合材料，对应于立方CdS和六方CdS两相。以可见光下降解有机染料RhB来比较h-CdS/c-CdS和单相CdS的光催化性能，结果表明在30min内，h-CdS/c-CdS材料对RhB实现了完全降解，降解率达到了99%.以上，而单相CdS对RhB的降解效果不太显著。关键词：光催化 硫化镉 水热法Abstract Photocatalytic technology is a effective way to relieve the energy crisis and solve the environmental pollution. This experiment preparated a new kind of photocatalytic materials, and?applied it to the degradation of rhodamine B under visible light, and have achieved good result. The major experimental results as follows: This experiment with cadmium chloride and thioacetamide as the source of S and Cd, with triethanolamine and water as mixed solvent, using hydrothermal method preparate h-CdS/c-CdS cadmium sulfide semiconductor nanomaterials. The sample was conductted phase analysis and morphology test using XRD, TEM, FT-IR test means. The result shows that using hydrothermal method preparated h-CdS/c-CdS CdS is two-phase composite material.Through the degradation of organic pollutant RhB studied the photocatalytic performance of h-CdS/c-CdS CdS and single-phase CdS on the condition of visible ligh. The result shows that h-CdS/c-CdS CdS have completely degradated RhB in 30 minuts, the degradation rate reached 99%, the degradation effect of single-phase CdS to RhB is not significant.Keywords: Photocatalytic CdShydrothermal method目 录1. 绪论11.1研究背景11.2光催化技术11.2.1半导体光催化原理11.2.2半导体光催化剂21.2.3光催材料的制备31.2.4非均相光催化氧化技术在废水处理当中的应用41.3本实验研究内容52. 实验部分62.1硫化镉光催化材料的制备62.1.1实验试剂62.1.2 实验仪器62.1.3 硫化镉的制备方法62.2 硫化镉光催化性能的研究72.2.1 罗丹明B（RhB)72.2.2试验方法73. 结果及分析93.1结果与讨论93.1.1 物相分析（X射线粉末衍射仪）93.1.2 透射电镜分析103.1.3 红外光谱123.1.4 紫外可见漫反射123.2 催化性能的研究134. 结论16参考文献17致谢181. 绪论1.1研究背景 随着经济的飞速发展，环境污染问题也变得越来越严重。由于人类对环境的破坏速度远远超过了环境的自我净化速度，工业废弃物、生活废弃物、汽车尾气的大量堆积和排放，过量使用化学化肥和农药，过量开采矿产资源，因此引发了土壤污染，空气污染和水污染，以及臭氧