摘要介孔材料具有高比表面积，规则可调节的纳米孔道结构，孔径分布窄，且具有良好的热稳定性；而介孔氧化硅空心球由于其大空腔结构，可大幅提升客体分子的负载量，成为研究热点之一，可广泛应用于药物输运和吸附分离等领域。67803

本课题中，我们成功地制备了介孔SiO2空心球。并在此基础上，对空心球结构进行了调控，获得了介孔孔道结构、粒径、壳层厚度不同的介孔空心球，且通过TEM和N2吸附脱附测试对其进行表征。

通过浸渍法将离子液体负载于空心球中，从而获得了介孔CO2吸附剂。室温下吸附实验结果表明吸附剂的吸附量为0.23 mmol/g-sorbent左右（112 mmol/mol-IL以上），与纯离子液体1-胺丙基-3-甲基咪唑四氟硼酸盐的3 mmol/mol-IL相比，吸附能力存在明显的大幅提高。通过调整负载量，我们得到当负载比率为0.42：1时，吸附剂吸附效果最好，为0.41 mmol/g-sorbent。

毕业论文关键词  介孔SiO2空心球 结构调控 CO2捕获 介孔吸附剂 离子液体

毕业设计说明书（论文）外文摘要

Title    Research of the novel adsorbents for CO2 capture based on hollow mesoporous nanospheres

Abstract

Mesoporous materials have unique advantages as following: high specific surface area, regular, narrow dispersed and adjustable pore size, and thermal stability. Hollow mesoporous silica spheres, in particular, attract great attention of researchers. Their big cavity structure can greatly elevate the loading capacity of guest molecules, making it possible to be widely used in the fields of drug delivery, gas adsorption and separation.

In this paper, we successfully synthesized hollow mesoporous silica spheres. Their hollow core size, shell pore size and thickness can be tuned by changing the etching time, ammonia and silica precursor concentrations, respectively. TEM and N2 adsorption-desorption analysis were used to characterize their pore structures.

Furthermore, novel mesoporous adsorbents for CO2 capture were synthesized by loading ionic liquids into hollow mesoporous silica spheres via wet impregnation. The results showed that the CO2 adsorption capacity of the adsorbents can reach around 0.23 mmol/g-sorbent（above 112 mmol/mol-IL）, which is much higher than (3 mmol/mol-IL) that of free ionic liquid [APMIm]BF4. By adjusting the recipe, we achieved the highest adsorption capacity of 0.41 mmol/g-sorbent at the ratio of IL: HMSs=0.42:1. 

Keywords  Hollow mesoporous silica spheres, Structure regulation, Carbon dioxide capture, Mesoporous adsorbents, Ionic liquids

目   次

1  引言 1

1.1  介孔材料的合成概述 1

1.2  介孔材料的应用概述 7

1.3  CO2吸附剂 7

1.4  课题的选择及意义 11

2  介孔二氧化硅的制备和结构调控 14

2.1  实验所用原料、试剂及设备 14

2.2  实验过程 14

2.3  实验结果与讨论 17

3  新型纳米介孔CO2吸附剂的制备和性能测试 26

3.1  实验所用原料、试剂及设备 26

3.2  实验过程 26

3.3  实验结果与分析 27

结论 33

致谢 34