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Studies on the Surface Properties of MCM-41 被引量:4

Studies on the Surface Properties of MCM-41
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摘要 MCM 41 materials with a well ordered long range structure, a large pore size and a high surface area have been synthesized. Their surface properties including the number and the nature of the surface hydroxyl groups and surface hydrophobicity/hydrophilicity have been investigated by means of 29 Si MAS NMR and FT IR spectra and TPD of probe molecules. The results clearly show that the surface of MCM 41 has an abundance of acidic silanol groups, and that the hydrophobicity/hydrophilicity can be modified by the introduction of Al and transition metals Ti, Cr, Ni and Fe into it. MCM 41 materials with a well ordered long range structure, a large pore size and a high surface area have been synthesized. Their surface properties including the number and the nature of the surface hydroxyl groups and surface hydrophobicity/hydrophilicity have been investigated by means of 29 Si MAS NMR and FT IR spectra and TPD of probe molecules. The results clearly show that the surface of MCM 41 has an abundance of acidic silanol groups, and that the hydrophobicity/hydrophilicity can be modified by the introduction of Al and transition metals Ti, Cr, Ni and Fe into it.
出处 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第3期242-245,共4页 高等学校化学研究(英文版)
基金 Supported by the National Natural Science Foundation of China(No. 2 0 1730 0 3) and State Key Basic Research Projectof China(No. 2 0 0 0 0 4 80 0 9)
关键词 Hydroxyl group Hydrophobicity/Hydrophilicity MCM 41 Hydroxyl group Hydrophobicity/Hydrophilicity MCM-41
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