Study of the nanoparticle/matrix interactions in Y2O3-SiO2 samples

被引：24

作者：

Cannas, C ^{[1
]}

Casu, M ^{[1
]}

Lai, A ^{[1
]}

Musinu, A ^{[1
]}

Piccaluga, G ^{[1
]}

机构：

[1] Univ Cagliari, Cittadella Univ Monserrato, Dipartimento Sci Chim, I-09042 Cagliari, Italy

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2002年 / 4卷 / 11期

关键词：

D O I：

10.1039/b110996k

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：

Two Y2O3-SiO2 nanocomposites with 10 and 30 wt.% yttrium oxide were obtained by a sol gel method, and characterized by TEM, X-ray diffraction, FTIR, Si-29 MAS and CPMAS NMR spectroscopy. It was found that small (2-3 nm) amorphous yttria nanoparticles are homogeneously dispersed in the silica matrix. Their size does not appear to grow with thermal treatment up to 900degreesC nor with yttria content. The silica interacts strongly at the interface with yttria nanoparticles through hydrogen bonds, sometime mediated by bridging water molecules, but also via direct Si-O-Y bonds.

引用

页码：2286 / 2292

页数：7

共 33 条

[11]

Engelhardt G., 1987, HIGH RESOLUTION SOLI

[12] NOVEL ASPECTS OF MID AND FAR IR FOURIER SPECTROSCOPY APPLIED TO SURFACE AND ADSORPTION STUDIES ON SIO2 [J].

HOFFMANN, P ;

KNOZINGER, E .

SURFACE SCIENCE, 1987, 188 (1-2) :181-198

[13]

*INT CTR DIFFR DAT, 1998, 201412 NN INT CTR DI

[14]

*INT CTR DIFFR DAT, 1998, 481623 N INT CTR DIF

[15]

LEJEUS AM, 1980, CURRENT TOPICS MAT S, V4, P481

[16] SI-29 NUCLEAR-MAGNETIC-RESONANCE STUDY OF SILICA [J].

LEONARDELLI, S ;

FACCHINI, L ;

FRETIGNY, C ;

TOUGNE, P ;

LEGRAND, AP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1992, 114 (16) :6412-6418

[17] Effects of the coating process on nanoscale Y2O3:Eu3+ powders [J].

Li, Q ;

Gao, L ;

Yan, DS .

CHEMISTRY OF MATERIALS, 1999, 11 (03) :533-+

[18] STRUCTURAL STUDIES OF SILICATES BY SOLID-STATE HIGH-RESOLUTION SI-29 NMR [J].

LIPPMAA, E ;

MAGI, M ;

SAMOSON, A ;

ENGELHARDT, G ;

GRIMMER, AR .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1980, 102 (15) :4889-4893

[19] SI-29 NUCLEAR MAGNETIC-RESONANCE STUDY OF THE SURFACE OF SILICA-GEL BY CROSS POLARIZATION AND MAGIC-ANGLE SPINNING [J].

MACIEL, GE ;

SINDORF, DW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1980, 102 (25) :7606-7607

[20] SURFACE FUNCTIONALITY OF AMORPHOUS SILICA BY INFRARED SPECTROSCOPY [J].

MCDONALD, RS .

JOURNAL OF PHYSICAL CHEMISTRY, 1958, 62 (10) :1168-1178

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