Uniformity and ordering of inner walls of (Al)MCM-41

被引：6

作者：

Dedecek, J ^{[1
]}

Zilková, N ^{[1
]}

Cejka, J ^{[1
]}

机构：

[1] Acad Sci Czech Republ, J Heyrovsky Inst Phys Chem, CZ-18223 Prague 8, Czech Republic

来源：

COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS | 2001年 / 66卷 / 04期

关键词：

mesoporous materials; molecular sieves; (Al)MCM-41; VIS spectroscopy; Co(II) ions; heterogeneous catalysis;

D O I：

10.1135/cccc20010567

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The uniformity and ordering of the surface of (AI)MCM-41 channel walls was investigated employing bare Co(II) ions as probes. VIS spectra of Co(II) ions evidenced the presence of two types of uniform cationic sites in dehydrated Co-(AI)MCM-41 in a wide range of Si/Al/Co chemical composition (Si/Al = 11-76, Co/Al = 0.08-0.44). These cationic sites represent centers of two types of uniform domains, containing in minimum 18 surface T atoms, present on the surface of the channel walls of (Al)MCM-41. These domains represent majority of the inner surface of the (AI)MCM-41 molecular sieve.

引用

页码：567 / 574

页数：8

共 14 条

[1]

Corma A, 1998, STUD SURF SCI CATAL, V117, P201

[2]

Dedecek J, 1999, J PHYS CHEM B, V103, P1462

[3] Co2+ ion siting in pentasil-containing zeolites, part 3.: Co2+ ion sites and their occupation in ZSM-5:: a VIS diffuse reflectance spectroscopy study [J].

Dedecek, J ;

Kaucky, D ;

Wichterlová, B .

MICROPOROUS AND MESOPOROUS MATERIALS, 2000, 35-6 :483-494

[4] Experimental study of the effect of Si/Al composition on the aluminum distribution in (Al)MCM-41 [J].

Dedecek, J ;

Zilková, N ;

Cejka, J .

MICROPOROUS AND MESOPOROUS MATERIALS, 2001, 44 (44-45) :259-266

[5]

DEDECEK J, 2000, STUD SURF SCI CATAL, V129, P235

[6] Co2+ ion siting in pentasil-containing zeolites II.: Co2+ ion sites and their occupation in ferrierite.: A VIS diffuse reflectance spectroscopy study [J].

Kaucky, D ;

Dedecek, JI ;

Wichterlová, B .

MICROPOROUS AND MESOPOROUS MATERIALS, 1999, 31 (1-2) :75-87

[7] The influence of pH on the structure of templated mesoporous silicas prepared from sodium metasilicate [J].

Kooyman, PJ ;

Slabová, M ;

Bosácek, V ;

Cejka, J ;

Rathousky, J ;

Zukal, A .

COLLECTION OF CZECHOSLOVAK CHEMICAL COMMUNICATIONS, 2001, 66 (04) :555-566

[8] ORDERED MESOPOROUS MOLECULAR-SIEVES SYNTHESIZED BY A LIQUID-CRYSTAL TEMPLATE MECHANISM [J].

KRESGE, CT ;

LEONOWICZ, ME ;

ROTH, WJ ;

VARTULI, JC ;

BECK, JS .

NATURE, 1992, 359 (6397) :710-712

[9] Mesoporous silica with controlled porous structure and regular morphology [J].

Schulz-Ekloff, G ;

Rathousky, J ;

Zukal, A .

INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 1999, 1 (01) :97-102

[10] Structure, distribution, and properties of Co ions in ferrierite revealed by FTIR, UV-Vis, and EXAFS [J].

Sobalík, Z ;

Dedecek, J ;

Kaucky, D ;

Wichterlová, B ;

Drozdová, L ;

Prins, R .

JOURNAL OF CATALYSIS, 2000, 194 (02) :330-342

← 1 2 →