羧甲基化壳聚糖Fe3O4磁性纳米粒子制备和表征

摘要：本文以羧甲基壳聚糖包覆的四氧化三铁磁性纳米粒子作为研究对象，并通过利用透射电子显微镜(TEM)、X射线衍射(XRD)、傅立叶红外(FT-IR)、差热-热重（TG-DTA）等对它进行了表征，羧甲基壳聚糖已经包覆在Fe3O4磁性纳米粒子表面，羧甲基壳聚糖磁性纳米粒子由于其结构特征，有很强的吸附能力，在50mL 10mg/L 的Co2+水溶液中，当温度为315K，pH为6，搅拌时间为60min，羧甲基壳聚糖磁性纳米粒子的用量为84mg时，处理效果最好，去除率可达93%。同时羧甲基壳聚糖磁性纳米粒子对钴离子以及一些有机物也有很好的吸附作用。在生产中可以利用其吸附性好的特点处理一些混合重金属的溶液。67961

毕业论文关键词：壳聚糖，四氧化三铁，钴离子，纳米粒子，吸附

Abstract：Magnetic nano-particles coating with carboxymethyl chitosan were prepared in this paper. The particles were synthesized by use carboxymethyl chitosan to modify magnetic nano-particles. CMC- MNP were characterized by the images of transmission electron microscope (TEM) ,X-ray diffraction patterns (XRD) , Fourier transform in-frared (FT-IR) and DTA-TG. They show that carboxymethyl chitosan are coated on the surface of Magnetite nanoparticles, carboxymethyl chitosan magnetic nanoparticles due to its structure, strong adsorption capacity, in 50 ml / L Cobaltic ion in aqueous solution. When the temperature for 315K, pH 6, stirring time was 60min, the amount of carboxymethyl chitosan magnetic nanoparticles is 84, the treatment effect is best, removal rate can reach 93%. At the same time carboxymethyl chitosan magnetic nanoparticles have good adsorption effect of cobalt ions and some organic compounds. In the production process can take advantage of its good adsorptioncharacteristics of some metal mixture solution.

Key words: Chitosan，Magnetite，Cobaltic ion， Nano-particles， Absorption

1 绪论 4

1.1 羧甲基壳聚糖的概念 4

1.2 羧甲基壳聚糖的基本性质及其应用 4

1.3 羧甲基壳聚糖在应用中的一些难题以及其解决方案 5

1.4 Fe3O4磁性纳米粒子的概念 5

1.5 Fe3O4磁性纳米粒子的制备 5

1.6 羧甲基壳聚糖磁性纳米粒子 6

2 实验部分 6

2.1 实验试剂 6

2.2 实验仪器 7

2.3 Fe3O4磁性纳米粒子的制备 7

2.4 羧甲基化壳聚糖Fe3O4磁性纳米粒子的制备 7

2.5 羧甲基化壳聚糖Fe3O4磁性纳米粒子的表征 8

2.6 Co2+溶液的配制 8

2.7 羧甲基壳聚糖磁性纳米粒子对Co2+的吸附 8

3 结果与讨论 8

3.1 羧甲基壳聚糖磁性纳米粒子的TEM分析 8

3.2 羧甲基壳聚糖磁性纳米粒子的XRD分析 9

3.3 羧甲基壳聚糖磁性纳米粒子的红外光谱分析 10

3.4 羧甲基壳聚糖磁性纳米粒子的差热-热重分析 10

3.5 影响羧甲基壳聚糖磁性纳米粒子对Co2+的吸附：用量羧甲基化壳聚糖Fe3O4磁性纳米粒子制备和表征:http://www.751com.cn/huaxue/lunwen_76344.html