Hydrolysis catalyst effect on sol-gel silica structure

被引：23

作者：

Asomoza, M ^{[1
]}

Dominguez, MP ^{[1
]}

Solis, S ^{[1
]}

Lara, VH ^{[1
]}

Bosch, P ^{[1
]}

Lopez, T ^{[1
]}

机构：

[1] Univ Autonoma Metropolitana Iztapalapa, Dept Quim, Mexico City 09340, DF, Mexico

来源：

MATERIALS LETTERS | 1998年 / 36卷 / 5-6期

关键词：

SiO2; sol-gel; structure; hydrolysis catalyst; X-ray diffraction; RDF; FTIR; DSC; TGA;

D O I：

10.1016/S0167-577X(98)00043-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Silica samples were prepared by the sol-gel process varying the hydrolysis catalyst. The samples were characterized by X-ray diffraction and the radial distribution function was determined (R.D.F.). Fourier transform infrared spectroscopy and thermal analysis were also used. It was found that OH-retention capacity as well as order in the material may be modified with hydrolysis catalysts. When the hydrolysis catalyst was NH4OH the sample did not dehydroxylate even at 1000 degrees C. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：249 / 253

页数：5

共 17 条

[1] Calorimetric study of the sol-gel silica gelation stage: Effect of gelation pH [J].

Asomoza, M ;

Dominguez, MP ;

Solis, S ;

Lopez, T .

MATERIALS LETTERS, 1997, 33 (3-4) :153-160

[2] PT/SIO2 SONOGELS - SYNTHESIS AND CHARACTERIZATION [J].

BOSCH, P ;

LOPEZ, T ;

ASOMOZA, M ;

GOMEZ, R ;

CAUQUI, MA ;

RODRIGUEZIZQUIERDO, JM .

LANGMUIR, 1995, 11 (11) :4328-4332

[3] SURFACE-STRUCTURE AND CHEMISTRY OF HIGH SURFACE-AREA SILICA-GELS [J].

BRINKER, CJ ;

BROW, RK ;

TALLANT, DR ;

KIRKPATRICK, RJ .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1990, 120 (1-3) :26-33

[4]

Bruckner R., 1970, Journal of Non-Crystalline Solids, V5, P123, DOI 10.1016/0022-3093(70)90190-0

[5] BAND LIMITS AND THE VIBRATIONAL-SPECTRA OF TETRAHEDRAL GLASSES [J].

GALEENER, FL .

PHYSICAL REVIEW B, 1979, 19 (08) :4292-4297

[6] THE SOL-GEL PROCESS [J].

HENCH, LL ;

WEST, JK .

CHEMICAL REVIEWS, 1990, 90 (01) :33-72

[7]

Iler R.K., 1979, The Chemistry of Silica

[8]

KLEIN LC, 1985, ANNU REV MATER SCI, V15, P227

[9] THERMAL-DECOMPOSITION AND FTIR STUDY OF PYRIDINE ADSORPTION ON PT/SIO2 SONOGEL CATALYSTS [J].

LOPEZ, T ;

ASOMOZA, M ;

GOMEZ, R ;

BOSCH, P ;

RODRIGUEZIZQUIERDO, JM ;

CAUQUI, MA .

THERMOCHIMICA ACTA, 1995, 255 :319-328

[10]

LOPEZ T, 1992, MATER CHEM PHYS, V32, P236

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