毕业论文论文题目（中文）3,4-二羟基苯甲醛改性的UiO-66-NH2对U(VI)的吸附行为研究论文题目（外文）Adsorption of U(VI) on 3,4-dihydroxybenzaldehyde modified UiO-66-NH23，4-二羟基苯甲醛改性的UiO-66-NH2对U(VI)的吸附性能研究摘要本文通过在120℃条件下在DMF中回流用ZrCl4和2-氨基对苯二甲酸合成了金属-有机骨架化合物UiO-66-NH2，再在氮气保护下在乙醇中回流用3,4-二羟基苯甲醛对UiO-66-NH2进行了功能化修饰,获得了UiO-66-OHBA。
通过红外光谱、元素分析以及X射线粉末衍射实验证明了3,4-二羟基苯甲醛成功修饰了UiO-66-NH2,且修饰后获得的UiO-66-OHBA骨架结构并未发生改变。
以UiO-66-NH2和UiO-66-OHBA为吸附剂吸附U(VI)并研究了pH、固液比、反应温度、离子强度、平衡时间等对吸附行为的影响，并对结果进行了分析。
实验结果表明UiO-66-NH2和UiO-66-OHBA均对U(VI)表现出比较良好的吸附能力，并且经修饰后的吸附剂吸附性能得到了提升。
pH值对吸附性能有较大影响，两者均在pH为4.5处吸附速率最大。
温度对UiO-66-OHBA吸附性能的影响要小于UiO-66-NH2,它们的吸附模型与Freundlich等温吸附模型吻合良好。
关键词：MOFs；UiO-66-NH2；3,4-二羟基苯甲醛；吸附；铀酰ADSORPTION OF U(VI) ON 3,4-DIHYDROXYBENZALDEHYDE MODIFIED UiO-66-NH2AbstractUsing ZrCl4and 2-aminoterephthalic acid,the metal-organic frameworks UiO-66-NH2was synthesized in refluxing DMF at 120℃.Then under the protection of nitrogen UiO-66-NH2 was functionally modified by 3,4-dihydroxy benzaldehyde in refluxing ethanol,yielding UiO-66-OHBA.The obtained samples were characterized by powder X-ray diffraction,FT-IR and elemental analysis,the results showed that the modification was successful.We studied how different pH value,solid-to-liquid ratio,ionic strength,temperature and time would influence the adsorption effect of uranyl from aqueous solution by UiO-66-NH2 and UiO-66-OHBA.According to the experiment,both UiO-66-NH2and UiO-66-OHBA had good adsorption capacity for U(VI),and the adsorption performance of UiO-66-OHBA was better than UiO-66-NH2.The pH value had a great influence on the adsorption performance,both of them reached the largest adsorption rate at ph 4.5.The effect of temperature on the adsorption capacity of UiO-66-OHBA was less than UiO-66-NH2,and the adsorption model was in good agreement with the Freundlich isotherm adsorption model.Key words: MOFs; UiO-66-NH2; 3,4-dihydroxy benzaldehyde;absorption;uranyl目录摘要-----------------------------------------------------------------------------------------------------------2 Abstract----------------------------------------------------------------------------------------------------3第一章绪论-----------------------------------------------------------------------------------------------71.1能源现状-----------------------------------------------------71.2 核能--------------------------------------------------------81.2.1 核能的优势---------------------------------------------81.2.2核能利用过程中存在的问题--------------------------------81.2.3含铀放射性废水的处理方法--------------------------------91.3金属-有机骨架材料（MOFs）------------------------------------101.3.1 MOFs材料简介-------------------------------------------101.3.2 新型MOFs材料UiO-66------------------------------------101.4 选题意义----------------------------------------------------11第二章 UiO-66-NH2及UiO-66-OHBA的合成及表征-------------------------------112.1引言---------------------------------------------------------112.2 实验--------------------------------------------------------112.2.1 UiO-66-NH2的合成---------------------------------------112.2.2 UiO-66-OHBA的合成--------------------------------------122.3 表征--------------------------------------------------------122.3.1傅里叶红外光谱（FT-IR）-----------------------------------122.3.2 C、H、N元素分析----------------------------------------132.3.3 X射线粉末衍射(PXRD)------------------------------------132.3.4 结论---------------------------------------------------14第三章 3,4-二羟基苯甲醛改性的UiO-66-NH2对U(VI)的吸附实验---153.1 实验所用试剂及仪器------------------------------------------153.2 实验部分----------------------------------------------------153.2.1 U(VI)的标准曲线----------------------------------------153.2.2 实验方法----------------------------------------------163.3不同条件对吸附剂吸附行为的影响---------------------------173.3.1 pH值对吸附U(VI)的影响---------------------------------173.3.2 离子强度对吸附U(VI)的影响-----------------------------183.3.4 平衡时间对吸附U(VI)的影响-----------------------------223.3.5 固液比对吸附U(VI)的影响-------------------------------233.4 本章小结---------------------------------------------------24第四章结论及思考---------------------------------------------------------------------------------254.1结论--------------------------------------------------------254.2 思考及展望-------------------------------------------------25参考文献---------------------------------------------------------------------------------------------------26致谢-------------------------------------------------------------------------------------------------------27第一章绪论1.1能源现状社会的发展和生产水平的进步，人类对能源的消耗量越来越大。
据有关数据显示，在1950年以前，人类消耗能量约为2.6×109t标准煤；到1987年，全球能源消耗上涨到了大约1.1×1010t标准煤；而到了2000年，全球能源消耗就已经超过了2.0×1010t标准煤。