Silylation of mesoporous silica MCM-41 with the mixture of Cl(CH2)3SiCl3 and CH3SiCl3:: combination of adjustable grafting density and improved hydrothermal stability
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作者:
Yang, HQ
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机构:Wuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R China
Yang, HQ
Zhang, GY
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Wuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R ChinaWuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R China
Zhang, GY
[1
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Hong, XL
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机构:Wuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R China
Hong, XL
Zhu, YY
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机构:Wuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R China
Zhu, YY
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[1] Wuhan Univ, Sch Chem & Mol Sci, Wuhan 430072, Peoples R China
[2] China Res Inst Daily Chem Ind, Taiyuan 030001, Peoples R China
Surface modification of MCM-41 with the mixture of Cl(CH2)(3)SiCl3 and CH3SiCl3 produced chloropropyl-methyl-bifunctionalized MCM-41 in one pot. It was found that CH3SiCl3 as a small molecule silylating agent could be used as both a thinner to adjust chloropropyl group loading density and end-capping one to decrease the amount of silanol groups on mesoporous silica. The chloropropyl-methyl-bifunctionalized MCM-41 has a better hydrothermal stability than chloropropyl-functionalized MCM-41 due to improved surface hydrophobicity. (C) 2003 Elsevier Inc. All rights reserved.