Spectroscopic, structural and textural properties of CaO and CaO-SiO2 materials synthesized by sol-gel with different acid catalysts

被引：38

作者：

Garcia, J. ^{[2
]}

Lopez, T. ^{[2
,3
]}

Alvarez, M. ^{[2
]}

Aguilar, D. H. ^{[1
]}

Quintana, P. ^{[1
]}

机构：

[1] CINVESTAV Merida, Dept Fis Aplicada, Yucatan 97110, Mexico

[2] Univ Autonoma Metropolitana Rectoria Gen, Mexico City 14387, DF, Mexico

[3] Inst Nacl Neurol & Neurocirugia MVS, Mexico City 14269, DF, Mexico

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2008年 / 354卷 / 2-9期

关键词：

ceramics; X-ray diffraction; phases and equilibria; sol-gels (xerogels); lime-silica; BET; FTIR;

D O I：

10.1016/j.jnoncrysol.2007.07.074

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Calcium oxide and a mixed CaO(10)-SiO2(90) wt% sample were synthesized by sol-gel method, using HCl or HNO3 as hydrolysis catalysts. The powders were thermally treated at 200, 400, 600 and 800 degrees C. Sample characterization was carried out by X-ray diffraction (XRD) and Fourier transform infrared (FT-IR) spectroscopy. The specific surface area and pore volume were measured by the BET method. For the pure samples, it was found that the crystalline phases and structural properties depend on the catalyst used during the synthesis; whereas the surface areas were similar in both cases. On the other hand, at high temperatures, the mixed CaO-SiO2 oxide showed glass-like properties, where CaO is dispersed in an amorphous phase. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：729 / 732

页数：4

共 23 条

[1] A study of the crystallization of ZrO2 in the sol-gel system:: ZrO2-SiO2 [J].

Aguilar, DH ;

Torres-Gonzalez, LC ;

Torres-Martinez, LM ;

Lopez, T ;

Quintana, P .

JOURNAL OF SOLID STATE CHEMISTRY, 2001, 158 (02) :349-357

[2] Quantification of CaCO3-CaSO3•0.5H2O-CaSO4•2H2O mixtures by FTIR analysis and its ANN model [J].

Böke, H ;

Akkurt, S ;

Özdemir, S ;

Göktürk, EH ;

Saltik, ENC .

MATERIALS LETTERS, 2004, 58 (05) :723-726

[3] OLEFIN SYNTHESIS WITH ORGANIC PHOSPHONATE CARBANIONS [J].

BOUTAGY, J ;

THOMAS, R .

CHEMICAL REVIEWS, 1974, 74 (01) :87-99

[4]

Brinker C.J., 1990, SOL GEL SCI

[5] Oxidative coupling of methane over alkaline earth oxides deposited on commercial support precoated with rare earth oxides [J].

Choudhary, VR ;

Mulla, SAR ;

Uphade, BS .

FUEL, 1999, 78 (04) :427-437

[6] Biodiesel from sunflower oil in supercritical methanol with calcium oxide [J].

Demirbas, Ayhan .

ENERGY CONVERSION AND MANAGEMENT, 2007, 48 (03) :937-941

[7] Crystallization and fracture: formation of product layers in sulfation of calcined limestone [J].

Duo, WL ;

Laursen, K ;

Lim, J ;

Grace, J .

POWDER TECHNOLOGY, 2000, 111 (1-2) :154-167

[8] Selective catalytic reduction of nitric oxide by methane in the presence of oxygen over CaO catalyst [J].

Fliatoura, KD ;

Verykios, XE ;

Costa, CN ;

Efstathiou, AM .

JOURNAL OF CATALYSIS, 1999, 183 (02) :323-335

[9] Synthesis of 1,3-dialkylurea from ethylene carbonate and amine using calcium oxide [J].

Fujita, S ;

Bhanage, BM ;

Kanamaru, H ;

Arai, M .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 230 (1-2) :43-48

[10]

KREIENBUHL P, 1999, Patent No. 908449

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