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Structure and properties of polymer modified
TiO pillared montmorillonite |
| WANG Chenjing1, YU Jiang2, XING Jianmin3, LIU Huizhou3 |
| 1.Laboratory of Separation Science and Engineering, Institute of Process Engineering, Chinese Academy of Sciences; Graduate University of Chinese Academy of Sciences; 2.Laboratory of Separation Science and Engineering, Institute of Process Engineering, Chinese Academy of Sciences; Department of Environmental Science and Engineering, College of Chemical Engineering, Beijing University of Chemical Technology; 3.Laboratory of Separation Science and Engineering, Institute of Process Engineering, Chinese Academy of Sciences |
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Abstract With the aim of improving the microstructures and properties of TiO2 pillared montmorillonite (MMT), a long-chain polymer (polyoxypropylenediamine, PPO-D 2000) was used as a template to synthesize composite pillared MMT. The materials were characterized by X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR) spectrophotometer, Fourier Raman (FT-Raman) spectrophotometer, thermo-gravimeter/differential thermo-gravimeter (TG/DSC), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) methods. The results show that as compared to low-molecular weight surfactant, this polymer significantly expanded the interlayer spacing and thus more TiO2 could be intercalated into MMT. The specific surface area of polymer/TiO2 pillared MMT was increased by 13% with comparison to TiO2 pillared MMT and rose to 241.52 m2/g. Both the pore diameter and volume are doubled, and thus the pore structure is optimized markedly. The investigation on the photo-catalytic degradation of methyl orange in aqueous solution show that the modulation of polymer molecules raise the adsorption content of montmorillonite and improve the photo-catalytic activity. Therefore, this process provides a novel alternative to design and prepare the advanced eco-catalytic materials with high adsorption capacity and photo-catalytic activity.
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Issue Date: 05 September 2008
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