Concentration of surface hydroxyl groups on MCM-41

被引：146

作者：

Jentys, A ^{[1
]}

Kleestorfer, K ^{[1
]}

Vinek, H ^{[1
]}

机构：

[1] Vienna Tech Univ, Inst Phys Chem, A-1060 Vienna, Austria

来源：

MICROPOROUS AND MESOPOROUS MATERIALS | 1999年 / 27卷 / 2-3期

基金：

奥地利科学基金会;

关键词：

MCM-41; surface hydroxyl groups; infrared spectroscopy; structure simulation;

D O I：

10.1016/S1387-1811(98)00265-0

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The type and concentration of hydroxyl groups present on MCM-41 were investigated by infrared spectroscopy as a function of the Si/Al ratio and the pore size. The purely siliceous samples contained the highest concentrations of weakly acidic silanol groups. On aluminum-containing MCM-41 samples additionally Bronsted and strong Lewis acid sites were observed. Their concentration increased with increasing aluminum content, while that of the weakly acidic silanol groups decreased. For MCM-41 samples prepared with C(12)TMABr, higher concentrations of weakly acidic hydroxyl groups and strong Lewis acid sites, and lower concentrations of Bronsted acid sites, were observed compared with MCM-41 prepared with C(16)TMABr. Comparison of the spectroscopic data with the results of a structure simulation revealed that the internal surface of MCM-41 is only partially covered with hydroxyl groups. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：321 / 328

页数：8

共 36 条

[1] HIGH-RESOLUTION TRANSMISSION ELECTRON-MICROSCOPY OF MESOPOROUS MCM-41 TYPE MATERIALS [J].

ALFREDSSON, V ;

KEUNG, M ;

MONNIER, A ;

STUCKY, GD ;

UNGER, KK ;

SCHUTH, F .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1994, (08) :921-922

[2] A NEW FAMILY OF MESOPOROUS MOLECULAR-SIEVES PREPARED WITH LIQUID-CRYSTAL TEMPLATES [J].

BECK, JS ;

VARTULI, JC ;

ROTH, WJ ;

LEONOWICZ, ME ;

KRESGE, CT ;

SCHMITT, KD ;

CHU, CTW ;

OLSON, DH ;

SHEPPARD, EW ;

MCCULLEN, SB ;

HIGGINS, JB ;

SCHLENKER, JL .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (27) :10834-10843

[3] Voids in variable chemical surroundings: Mesoporous metal oxides [J].

Behrens, P .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1996, 35 (05) :515-518

[4] SYNTHESIS, CHARACTERIZATION, AND CATALYTIC ACTIVITY OF TI-MCM-41 STRUCTURES [J].

BLASCO, T ;

CORMA, A ;

NAVARRO, MT ;

PARIENTE, JP .

JOURNAL OF CATALYSIS, 1995, 156 (01) :65-74

[5] Influence of the aluminum content on the adsorptive properties of MCM-41 [J].

Boger, T ;

Roesky, R ;

Glaser, R ;

Ernst, S ;

Eigenberger, G ;

Weitkamp, J .

MICROPOROUS MATERIALS, 1997, 8 (1-2) :79-91

[6] SYNTHESIS OF ALUMINUM-RICH MCM-41 [J].

BORADE, RB ;

CLEARFIELD, A .

CATALYSIS LETTERS, 1995, 31 (2-3) :267-272

[7]

BURCH R, 1996, J CHEM SOC CHEM COMM, V16, P951

[8] STUDIES ON MESOPOROUS MATERIALS .1. SYNTHESIS AND CHARACTERIZATION OF MCM-41 [J].

CHEN, CY ;

LI, HX ;

DAVIS, ME .

MICROPOROUS MATERIALS, 1993, 2 (01) :17-26

[9] Hydrogenation of aromatics in diesel fuels on Pt/MCM-41 catalysts [J].

Corma, A ;

Martinez, A ;

MartinezSoria, V .

JOURNAL OF CATALYSIS, 1997, 169 (02) :480-489

[10] From microporous to mesoporous molecular sieve materials and their use in catalysis [J].

Corma, A .

CHEMICAL REVIEWS, 1997, 97 (06) :2373-2419

← 1 2 3 4 →