引用本文:
范毅武, 冯钰锜, 达世禄, 施治国, 徐丽. β-环糊精键合改性介孔硅胶的表征和吸附性能评价[J]. 应用化学,
2004, 21(9): 878-883.
Citation: FAN Yi, FENG Yu-Qi, DA Shi-Lu, SHI Zhi-Guo, XU Li. Characterization of Mesoporous Silicas with Chemically Bonded β-Cyclodextrin and Their Adsorption Performance[J]. Chinese Journal of Applied Chemistry, 2004, 21(9): 878-883.
Citation: FAN Yi, FENG Yu-Qi, DA Shi-Lu, SHI Zhi-Guo, XU Li. Characterization of Mesoporous Silicas with Chemically Bonded β-Cyclodextrin and Their Adsorption Performance[J]. Chinese Journal of Applied Chemistry, 2004, 21(9): 878-883.
β-环糊精键合改性介孔硅胶的表征和吸附性能评价
摘要:
以3种具有不同比表面积和孔结构的介孔硅胶为基质,采用2种不同的键合方法将β-环糊精引入到介孔材料体系中,结果表明,采用先将偶联剂与β-环糊精反应再在较大体积的反应溶剂中与硅胶键合的方法可得到较大的键合量。考察了键合前后的介孔硅胶的比表面积和孔结构参数,结果表明β-环糊精的引入使硅胶的比表面积、孔径和孔容均有较明显的下降,孔结构发生变化。具有最大比表面积的介孔硅胶MS1经适当方法键合改性后,可获得最高的表面β-环糊精修饰量(1.36 μmol/m2),表现出对酚类化合物的强吸附性能,尤其是对2,4二硝基酚吸附量达24.81 mg/g。从不同的介孔硅胶基质获得的β-环糊精键合材料对于不同的酚类化合物表现出不同的选择性,体现了介孔材料在引入β-环糊精进行键合时由于孔结构的不同而导致的差异。而有序或无序孔结构对于材料的吸附性能未发现显著影响。
English
Characterization of Mesoporous Silicas with Chemically Bonded β-Cyclodextrin and Their Adsorption Performance
Abstract:
Three mesoporous silica materials were chemically bonded with β-cyclodextrin(β-CD) using two different methods. The bonding methods were compared by calculating the bonded amount of β-cyclodextrin. The results indicated that larger bonding amount of β-CD could be obtained by first coupling β-CD with KH-560 and then reacting with silica. The resulting materials were characterized by N2 adsorption measurement and the physical and porous parameters were compared before and after bonding. Surface areas and pore diameters of all the materials decrease after bonding. The bonded materials were evaluated as adsorbents for phenols. The ordered mesoporous silica(MS1) with 1.36 μmol/m2 of β-CD bonded showed the largest adsorption capability towards phenols; its adsorption capacity for 2,4-dinitrophenol was found to be 24.81 mg/g. And the pore structure of the mesoporous silicas can affect the adsorption selectivity of the resulting β-CD bonded adsorbents towards the studied phenols.
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Key words:
- mesoporous silica
- / chemical bonding
- / β-cyclodextrin
- / adsorption
- / phenols
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