CdSAl论文纳米复合结构材料的制备及其光催化性能的分析研究 .docx
精品名师归纳总结CdS/Al203 论文：纳 M复合结构材料的制备及其光催化性能的争论【中文摘要】近年来 , 环保问题越来越受到人们的关注, 污水和废气的排放对环境影响巨大 , 所以探究争论经济有效的污水及废气处理技术势在必行。纳 M材料具有特别的物理化学特性 , 具有良好的分别、光催化、【英文摘要】 In recent years, environmental problem is subjected to people s concern. Especially, there exists a huge influence of the sewage and waste gas emissions onenvironment. Therefore, the research on the economic and effective sewage waste gas treatment technology is imperative. For nanomaterials, they in general possess gene some special physical and chemistry properties, such as good separation, catalyst, reduction and adsorption.Additionally, the small size of structure unit can make it contact effectively with pollutants, and thus, it can show high photocatalyst effect compared with the traditional water treatment technology. Therefore, nanostructured materials show a wide application prospect in water treatment fields.The photocatalysis can completely degrade organic pollutants into CO2 and H2O. In general, the nanomaterials with photocatalytic properties are almost可编辑资料 - - - 欢迎下载精品名师归纳总结semiconductor. When the nanostructured particles are irradiated by the light with energy higher than its bandgap, electrons can be excited effectively from valence bandto conduction band. Thus, quantities of electrons and holes can exist in conduction band and valence band, respectively. Moreover, the high active electrons and holes can form a redox system. Additionally, because the size of nanoparticles is very small, photogenerated carriers can easily migrate onto the nanoparticle surface through a simple diffusion, and then take place redox reaction withthe electron donor or acceptor.The composite with two ormore nanomaterials may have some new features. When nanostructured CdS with a narrow band gap was loaded into one-dimensional 1D nanostructured Al2O3 with a high specific surface area, CdS can be used as photocatalyst and 1D Al2O3 can be used as an absorbent. Organic pollutants can be absorb effectively into the composites, and then degraded into CO2 and H2O. Thus, the photocatalytic efficiency is expected to increase.In this thesis, IDCdS/Al2O3 nanocomposites were prepared by a hydrothermal method, followed by a vulcanizationa at 600 under a weak reduction atmosphere. The products were measured by XRD,可编辑资料 - - - 欢迎下载精品名师归纳总结SEM, and laser particle size analyzer. The degradability of 1D CdS/Al2O3 nanocompositse, using methylene blue as an objective dye, was researched in detail. The results show that there is a great influence of light source power,reaction time, reaction temperature, and catalystconcentration on the photocatalytic degradation of methylene blue. Finally, the dye of methyl orange was also used to verify the activity of photocatalytic degradation.Our experiments show that the as-prepared CdS/Al2O3 nanocomposite possessed high photocatalytic activity for organic dyes.【关键词】 CdS/Al203 光催化性能 亚甲基蓝【英文关键词】 CdS/Al2O3photocatalytic activity methylene blue【目录】纳 M复合结构材料的制备及其光催化性能的争论摘要 3-4ABSTRACT4-5第一章 绪论 8-151.1争论背景 8-111.1.1纳 M技术与纳 M材料 8-91.1.2纳 M材料的物理特性9-101.1.3纳 M材料的应用 10-111.2纳 M粒子的制备方法11-121.2.1纳 M微粒子的物理制备方法 111.2.2纳 M微粒子的化学制备方法 11-121.3半导体光催化原理 12-141.3.1 光催化机理和催化性能的调控机制12-131.3.2影响催化反应的因素 13-141.3.3光催化反应的动力学基础141.4论文构思可编辑资料 - - - 欢迎下载精品名师归纳总结14-15其次章 纳 M复合结构材料的制备与分析表征15-282.1试验试剂与仪器 15-162.2材料的制备 16-192.2.1 CdS/Al_2O_3纳 M球状材料的制备 162.2.2 CdS/Al_2O_3纳 M棒状材料的制备16-172.2.3掺杂 Au的 CdS/Al_2O_3纳 M棒状材料的制备 17-182.2.4 CdSe/Al_2O_3纳 M棒状材料的制备 18-192.3分析表征 19-262.3.1 XRD 分析 19-212.3.2粒度分析 21-242.3.3扫描电镜分析24-262.4小结 26-28第三章 光催化降解试验 28-453.1试验装置 283.2分析方法28-313.2.1试验方法 28-293.2.2最大吸取波长的确定29-303.2.3绘制标准曲线 30-313.3光催化亚甲基蓝试验31-363.3.1光催化验证反应 31-323.3.2空白试验 32-333.3.3暗反试验 33-343.3.4不同催化剂光催化亚甲基蓝对比反应 34-363.4光催化降解甲基橙试验 36-383.4.1甲基橙最大吸取波峰的测定 36-373.4.2甲基橙标准曲线的绘制373.4.3甲基橙光催化降解试验37-383.5外部因素对光催化反应的影响38-443.5.1光强对光催化的影响 38-393.5.2光照时间的影响 39-403.5.3温度的影响 40-413.5.4催化剂用量的影响 41-433.5.5 PH 值的影响 43-443.6小结 44-45第四章 结论 45-46致谢 46-47参考文献 47-50攻读学位期间的争论成果 50可编辑资料 - - - 欢迎下载精品名师归纳总结可编辑资料 - - - 欢迎下载
