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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. shu

Characterization of Mesoporous Silicas with Chemically Bonded β-Cyclodextrin and Their Adsorption Performance

1.
College of Chemistry and Molecular Science, Wuhan University, Wuhan 430072

Corresponding author: FENG Yu-Qi,
Received Date: 8 October 2003
Available Online: 26 February 2004
Fund Project: 国家自然科学基金资助项目(20275029) (20275029)

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.
- mesoporous silica,
- chemical bonding,
- β-cyclodextrin,
- adsorption,
- phenols
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