| 氨基改性介孔二氧化硅的制备及其吸附性能研究 |
| Macroporous Silica: Surface Modification and Adsorption Properties |
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| 摘要: 合成了一种具有较大孔径的氨基改性介孔二氧化硅材料(m-MCF)。通过XRD、TEM、低温氮吸附、TGA、FTIR以及原子吸收光谱(AAS)等表征方法对产物的结构和性能进行的分析表明:利用三甲基苯为扩孔剂制备得到的介孔材料具有较大的孔径，有利于功能基团对孔内表面的改性。当氨基改性介孔材料后，该材料仍然保留较大的孔径(22 nm)和较高的比表面积(444 m2·g-1)。研究发现:与改性而未扩孔的介孔二氧化硅SBA-15相比，该材料对铜离子的吸附能力提高了2倍。 |
| 关键词: 介孔材料 改性 扩孔 3-氨丙基三乙氧基硅烷 吸附 |
| 基金项目: |
| Abstract: macroporous silica materials were surface modified by a grafting method using amine functional groups. The structure and physicochemical properties of the materials were characterized with low-angle XRD， N2 adsorption-desorption， FTIR and atomic absorption spectrophotometry (AAS). The obtained materials still held a high surface area of 444 m2·g-1 and a larger pore size of 22 nm after the pore surface was functionalized with 3-aminopropyl- triethoxysilane (APTES). The adsorption properties were investigated by Cu2+ removal from aqueous solutions. The resultant materials demonstrated an improved adsorption capacity， which is almost three times as high as that of conventional amine modified mesoporous silica SBA-15. |
| Keywords: mesoporous materials modified pore-expanded 3-aminopropyltriethoxysilane adsorption |
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| 杨 娜,朱申敏,张 荻.氨基改性介孔二氧化硅的制备及其吸附性能研究[J].无机化学学报,2007,23(9):1627-1630. |
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