摘要本文以Cd(C3H5OS2)2 为前驱体，乙二胺为溶剂，采用溶剂热法制备了硫化镉纳米晶．采用透射电子显微镜（TEM），固体紫外可见漫反射光谱(DRS),粉末X射线衍射(XRD)，X射线光电子能谱分析（XPS），荧光光谱（PL），拉曼光谱（Raman）对合成产物进行了表征。以CdS纳米晶作为可见光光催化剂，用难降解的离子型染料罗丹明B为探针分子，讨论了在CdS中，所掺金属离子的种类、质量分数对光催化降解罗丹明B的影响。结果表明：Ni2+掺杂能提高CdS光催化降解罗丹明B的活性，最佳的离子质量分数为催化剂用量的1.5%。Mn2+及Zn2+对CdS光催化降解罗丹明没有显著影响。63748

毕业论文关键词  硫化镉  罗丹明B  光催化

毕业设计说明书（论文）外文摘要

Title       Doping on structure and properties of CdS                     

Abstract

Nano—crystal CdS photocatalyst was prepared by solvothermal method with Cd(C3H5OS2)2  as precursor,and ethylene diamine as solvent. The product was characterized by transmission electron microscopy (TEM), UV—Vis diffused reflectance spectroscopy(DRS,) X—ray diffraction(XRD), X photoelectron spectroscopy (XPS), photoluminescence fluorescence spectrum (PL) and Raman spectrum. The effects of the variety of doping and concentration of doping on the photodegradation of RhodamineB(RhB) were investigated under the conditions of the nano—crystal CdS and bulk CdS as the visible—light photocatalyst and RhB as a molecule Probe．The results show that the Ni2+ was found to significantly improve the activity of photocatal—ysis，the Mn2+ and Zn2+ had not significant effect on photocatalysis reaction,and the optimal mass fraction of dopants are 1.5% and 3% of CdS mass .

Keywords  CdS  RhodamineB(RhB)  photocatalyst

目次

1 绪论 1

1.1  引言 1

1．2  纳米材料概述 2

1．3  纳米材料的制备 3

1．4  CdS简介 5

1．4．1 CdS粒子概述 5

1．4．2 CdS制备 6

1．4．3 CdS光催化降解有机物原理 8

1.4.4 有机污染物经CdS降解后处理效果的表征方式 10

1.5 常见表征手段 10

1．6废水中的有机污染物的分类及其降解 11

1．6．1概述 11

1．6．2染料废水的光催化降解 11

1．7 本课题的研究内容 12

2  CdS的制备、表征及其光催化性能研究 13

2.1  药品与仪器 13

2.1.1  实验药品 13

2.1.2  实验仪器 13

2.2  标准曲线的绘制 14

2.3 CdS的制备 15

2.4 CdS的表征 16

2.4.1 形貌表征 16

2.4.2 UV-Vis漫反射表征 16

2.4.3  XRD表征 17

2.4.4 XPS表征 18

2.5  CdS光催化性能分析