Post-synthetic preparations of titanium-containing mesopore molecular sieves

被引:79
作者
Ahn, WS [1 ]
Lee, DH
Kim, TJ
Kim, JH
Seo, G
Ryoo, R
机构
[1] Inha Univ, Dept Chem Engn, Inchon 402751, South Korea
[2] Chonnam Natl Univ, Dept Chem Technol, Kwangju 500757, South Korea
[3] KAIST, Dept Chem, Taejon 305751, South Korea
[4] KAIST, Ctr Mol Sci, Taejon 305751, South Korea
关键词
titanium; mesoporous molecular sieves; peroxide oxidation; post-synthesis;
D O I
10.1016/S0926-860X(98)00384-6
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Titanium-substituted mesoporous molecular sieves were prepared post-synthetically by applying Ti-butoxide in ethanol solutions of different concentrations to MCM-41, MCM-48, and KIT-1. The catalysts obtained were characterized by XRD, FT-IR, UV-Vis spectroscopies, XAS, and N-2 physisorption. Incorporation of Ti seems to promote further crosslinking of the mesoporous walls of the samples, and resulted in wall thickness increases. The post-synthetically prepared Ti-mesoporous derivatives using titanium butoxide grafting were catalytically active for the selective oxidation of 2,6-di-tert-butylphenol with H2O2 Their activities depended on the Ti concentration of the catalysts. Comparison works with hydrothermally prepared Ti-MCM-41, Ti-HMS or post-synthetically prepared Ti-mesopore catalysts, either using titanocene grafting or by TiCl4 atom planting method, are also reported. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:39 / 49
页数:11
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