摘要：论文成功地合成了L-组氨酸（His）修饰硅基到介孔材料His-SBA-15，通过TEM, XRD, FT-IR, N2吸附-脱附实验手段，对材料的进行了表征，结果表明，修饰剂成功的键合在材料表面且材料的结构基本保持不变。研究了其对重金属离子Ni2+的吸附性能。论文考察了溶液pH值、吸附时间和吸附剂用量对Ni2+吸附效果的影响，结果表明，L-组氨酸修饰介孔氧化硅对Ni2+具有较好的吸附效果。74014

毕业论文关键词：硅基介孔材料， L-组氨酸改性，Ni（II）,吸附

Abstract：Mesoporous silica material SBA-15 functionalized with L- histidine was synthesised in this thesis。 The structures, surface adsorption properties and pore sized distribution of the synthesized materials SBA-15，NH2-SBA-15 and His-SBA-15 were successfully characterized by TEM, XRD, FT-IR, N2 adsorption-desorption and thermo gravimetric analysis。 The results indicated that the organic groups were successfully anchored on the SBA-15 surfaces, the ordering of the inorganic support was preserved during the chemical modifications and the materials had better thermo stability。 The adsorption property of modified materials for Ni2+ was also studied。 The factors which may influence the efficiency of the adsorption, such as pH, contact time and the concentration of the solution, was optimized。 The results indicated that His-SBA-15 had good adsorption performance to Ni2+。

Key words: SBA-15，L - histidine modified，Ni (II),  adsorption performance

目录

1前言 5

1。1有序介孔材料发展 5

1。1。1硅基介孔材料 5

1。1。2硅基介孔材料的应用 5

1。2 SBA-15 的研究进展 5

1。2。1 SBA-15的研究现状 5

1。2。2 SBA-15的改性研究 5

1。3 本论文的研究意义和内容 6

1。3。1研究意义 6

1。3。2研究内容 6

2。实验 7

2。1 实验部分 7

2。1。1 药品与试剂 7

2。1。2 测试仪器 7

2。2 材料的合成 7

2。2。1 介孔分子筛SBA-15的制备 7

2。2。2 介孔分子筛SBA-15 的半胱氨酸改性 8

2。3 表征分析 8

2。3。1 透射电镜(TEM)表征 8

2。3。2 XRD分析 9

2。3。3 红外FT-IR分析 10

2。3。4 N2吸附-脱附曲线 11

2。3。5 TGA热重分析 12

2。4 改性后介孔材料对Ni2+的吸附性能研究 13

2。4。1 选择性吸附实验 13

2。4。2 吸附实验 14

2。4。3 溶液pH对吸附效果影响 15

2。4。4 吸附剂用量对吸附效果的影响 15

2。4。5 吸附时间对吸附效果影响 16

2。4。6 吸附动力学研究 16