NH4F effect in post-synthesis Al-MCM-41 mesoporous treatment of materials

被引：45

作者：

Luque, R ^{[1
]}

Campelo, JM ^{[1
]}

Luna, D ^{[1
]}

Marinas, JM ^{[1
]}

Romero, AA ^{[1
]}

机构：

[1] Univ Cordoba, Fac Ciencias, Dept Quim Organ, E-14014 Cordoba, Spain

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 2005年 / 84卷 / 1-3期

关键词：

heterogeneous catalysis; mesoporous materials; MCM-41;

D O I：

10.1016/j.micromeso.2005.05.013

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

A series of Al-MCM-41 mesoporous molecular sieves, with Si/Al ratio in the range 15-40, were synthesized and characterized by XRD, N-2 physisorption, DRIFT and Al-27 and Si-29 MAS NMR analysis. Al-MCM-41 samples were prepared by two procedures. (i) Synthesis at room temperature, following the procedure described by Grun et al. including some variations. (ii) The as-synthesized samples obtained in (i) were suspended in 300 mL of NH4F 0.1 M for 34 h. Al-MCM-41 samples with high surface acidity were synthesized. The NH4F treatment contributed to enhance these acidic properties, leading to materials highly active in the vaporphase cumene conversion, studied as a catalytic test. The catalytic activity was related to tetrahedral or octahedral aluminum environments for non-fluorinated samples and fluorinated ones, respectively. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：11 / 20

页数：10

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