在有序介孔碳修饰电极上析出铀

摘要通过水热晶化法以P123为模板、以TEOC为硅源制备介孔分子筛SBA-15，然后采用硬模板法以SBA-15为模板、以蔗糖为碳源制备有序介孔碳材料CMK-3，用XRD、TEM、SEM、红外光谱、N2吸附-脱附测试对得到的SBA-15、CMK-3进行结构表征，得到的SBA-15孔径为5.4nm，孔体积为0.65cm3/g。将得到的CMK-3修饰到ITO玻璃电极上，以硝酸铀酰溶液为电解液，构建电解槽，用三电极体系在电化学工作站进行循环伏安测试，ITO玻璃电极作工作电极，Ag/AgCl电极作参比电极，Pt电极作为辅助电极。测得在pH为4，硝酸铀酰溶液浓度为100mg/L时铀的析出电位为-3.489V。通过紫外分光光度法测量电沉积的效果，计算得铀酰离子在CMK-3修饰ITO玻璃电极上电沉积的吸附容量为7.381 mg•g-1，吸附效率18.945%。28488
关键词有序介孔碳铀电化学电析出
毕业论文设计说明书外文摘要
Title    Electrodeposit uranium(Ⅵ) using ordered mesoporous carbon modified electrode
Abstract
Mesoporous molecular sieve SBA-15 was prepared by hydrothermal crystallization method with P123 as the template and TEOC as the silica source, and then using SBA-15 as template and sucrose as carbon source to prepare ordered mesoporous carbon CMK-3 by hard template method. The structure of CMK-3 and SBA-15 was characterized by XRD, TEM, SEM, FT-IR, N2 adsorption desorption tests. The pore diameter of SBA-15 was 5.4nm, and the pore volume was 0.65cm3/g. The CMK-3 was modified to the ITO electrode. Construct an electrolytic cell with uranium nitrate solution as the electrolyte with a three electrode system in electrochemical workstation of cyclic voltammmetry(CV). Use the ITO electrode as working electrode, Ag/AgCl electrode as reference electrode and Pt electrode as auxiliary electrode. The potential of the uranium precipitaion at pH 4 concentration 100mg/L was measured -3.489V. The adsorption capacity of the uranium ion on the CMK-3 modified ITO glass electrode was 7.381 mg•g-1, and the adsorption efficiency wa 18.945%.
Keywords Ordered mesoporous carbon   Uranium   Electrochemistry   Electrodeposit
目   次
1 绪论    1
1.1 铀    1
1.1.1 我国的铀资源现状    1
1.1.2 海水提铀技术的发展    2
1.1.3 电沉积技术提取铀的优势    3
1.2 介孔分子筛    3
1.3 有序介孔碳    4
1.3.1 有序介孔碳的简介    4
1.3.2 有序介孔碳在吸附中的应用    4
1.4 电化学    5
1.4.1 电化学测试简介    5
1.4.2 电化学工作站    6
1.4.3 三电极体系    6
1.4.4 循环伏安法    7
1.5 废水中铀的测量方法    8
2 实验部分    9
2.1 实验材料及试剂    9
2.2 实验仪器    9
2.3 表征方法    10
2.3.1 X射线粉末衍射（XRD）    10
2.3.2 透射电子显微镜（TEM）    10
2.3.3 扫描电子显微镜（SEM）    10
2.3.4 红外光谱（FT-IR）    10
2.3.5 N2吸附-脱附测试（BET）    10
2.4 实验流程图    11
2.5 介孔分子筛SBA-15的制备    11
2.6 有序介孔碳CMK-3 的制备    12 在有序介孔碳修饰电极上析出铀:http://www.751com.cn/huaxue/lunwen_23347.html