ULTRASOUND AS A TOOL FOR THE PREPARATION OF GELS - EFFECT ON THE TEXTURAL PROPERTIES OF TIO2-SIO2 AEROGELS

被引：16

作者：

CALVINO, JJ ^{[1
]}

CAUQUI, MA ^{[1
]}

CIFREDO, G ^{[1
]}

ESQUIVIAS, L ^{[1
]}

PEREZ, JA ^{[1
]}

DELSOLAR, MR ^{[1
]}

RODRIGUEZIZQUIERDO, JM ^{[1
]}

机构：

[1] UNIV CADIZ,DEPT STRUCT & PROPERTIES MAT,E-11510 PUERTO REAL,SPAIN

来源：

JOURNAL OF MATERIALS SCIENCE | 1993年 / 28卷 / 08期

关键词：

D O I：

10.1007/BF00367583

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

TiO2-SiO2 aerogels have been prepared by hydrolysis and polycondensation of alkoxides following two different methods: the classic one, using ethanol as a solvent, and the sonic one, by means of activation with ultrasound. The work is focused on the comparison of the textural properties of gels obtained by both synthetic routes. Nitrogen physisorption, mercury pycnometry and transmission electron microscopy have been used as characterization techniques. The sonogels present higher values of specific surfaces and apparent densities, lower pore volumes, finer and sharper pore-size distributions and lower average particle size. These properties are discussed and related to the preparation techniques.

引用

页码：2191 / 2195

页数：5

共 23 条

[1]

ADAMSON AW, 1982, PHYSICAL CHEM SURFAC, P552

[2] HYDROLYSIS OF TITANIUM ALKOXIDES - MODIFICATION OF THE MOLECULAR PRECURSOR BY ACETIC-ACID [J].

DOEUFF, S ;

HENRY, M ;

SANCHEZ, C ;

LIVAGE, J .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1987, 89 (1-2) :206-216

[3]

EFREMOV DK, 1991, STUD SURF SCI CATAL, V62, P115

[4]

ESQUIVIAS L, 1990, RIV STAZ SPER VETRO, V5, P85

[5]

ESQUIVIAS L, 1988, 3RD P INT C ULTR PRO, P255

[6]

Gregg S.J., 1982, ADSORPTION SURFACE A, P111

[7] DECOMPOSITION OF 1,2-DICHLOROETHANE ON TIO2/SIO2 [J].

IMAMURA, S ;

TARUMOTO, H ;

ISHIDA, S .

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH, 1989, 28 (10) :1449-1452

[8]

INGEMAR CU, 1990, J CATAL, V125, P541

[9] SONOCHEMISTRY .2. SYNTHETIC APPLICATIONS [J].

LINDLEY, J ;

MASON, TJ .

CHEMICAL SOCIETY REVIEWS, 1987, 16 (03) :275-311

[10]

LIRONG Y, 1988, J NONCRYST SOLIDS, V100, P309, DOI DOI 10.1016/0022-3093(88)90038-5

← 1 2 3 →