Preparation of amorphous silica gel from Algerian siliceous by-product of kaolin and its physico chemical properties

被引：28

作者：

Brahmi, D. ^{[1
]}

Merabet, D. ^{[1
]}

Belkacemi, H. ^{[1
]}

Mostefaoui, T. A. ^{[2
]}

Ouakli, N. Ait ^{[1
]}

机构：

[1] Univ Bejaia, Mat Technol Lab Proc Engn LTMGP, Bejaia 06000, Algeria

[2] Univ Bejaia, Lab Phys Chim & Catalyse, Equipe LuMaNo, Bejaia 06000, Algeria

来源：

CERAMICS INTERNATIONAL | 2014年 / 40卷 / 07期

关键词：

Siliceous by-product; Sodium silicate; Amorphous silica; Sol-gel; SODIUM-SILICATE; CHITOSAN; AEROGELS;

D O I：

10.1016/j.ceramint.2014.03.021

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：

The present work is aimed to achieve valorization of siliceous by-product of Algerian kaolin in the preparation of sodium silicate. This silicate is commonly used as a precursor in silica gel preparation. To prepare sodium silicate, a by-product sample is mixed with sodium carbonate with a molar ratio SiO2/Na2O=3 and heated at high temperature (1000 degrees C). Hydrochloric acid is then slowly added to the hydrated sodium silicate to obtain silica gel. The siliceous by-product and the prepared silica gel are characterized by XRF, XRD, FTIR and BET. The study of porous texture by Nitrogen Adsorption Technique at 77 K shows that the specific surface area S-BET increases in the silica gel compared to those of kaolin byproduct from 5.6 m(2) g(-1) to 477.9 m(2) g(-1). (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：10499 / 10503

页数：5

共 22 条

[1] Optically transparent silica aerogels based on sodium silicate by a two step sol-gel process and ambient pressure drying [J].

Bangi, Uzma K. H. ;

Jung, In-Keun ;

Park, Chang-Sun ;

Baek, Seungsu ;

Park, Hyung-Ho .

SOLID STATE SCIENCES, 2013, 18 :50-57

[2]

Falcone James S., DETERMINATION SODIUM

[3] SYNTHESIS OF POROUS SIO2 SPHERICAL-PARTICLES BY SOL-GEL METHODS IN W/O EMULSION [J].

HIROSE, A ;

YAMASHITA, H ;

MAEKAWA, T .

ANALYTICAL SCIENCES, 1994, 10 (05) :737-741

[4] Effective preparation of crack-free silica aerogels via ambient drying [J].

Hwang, Sung-Woo ;

Jung, Hae-Hyun ;

Hyun, Sang-Hoon ;

Ahn, Young-Soo .

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 2007, 41 (02) :139-146

[5] Aero-sol-gel synthesis of nanostructured silica powders [J].

HyeonLee, J ;

Beaucage, G ;

Pratsinis, SE .

CHEMISTRY OF MATERIALS, 1997, 9 (11) :2400-2403

[6] Characterization of silicas precipitated from solution of sodium metasilicate and hydrochloric acid in emulsion medium [J].

Jesionowski, T .

POWDER TECHNOLOGY, 2002, 127 (01) :56-65

[7] Aggregation in SiO2 sols from sodium silicate solutions [J].

Knoblich, B ;

Gerber, T .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 2001, 283 (1-3) :109-113

[8] Rietveld refinement of amorphous SiO2 prepared via sol-gel method [J].

Martinez, J. R. ;

Palomares-Sanchez, S. ;

Ortega-Zarzosa, G. ;

Ruiz, Facundo ;

Chumakov, Yurii .

MATERIALS LETTERS, 2006, 60 (29-30) :3526-3529

[9] Synthesis and grafting of silica aerogels [J].

Marzouk, S ;

Rachdi, F ;

Fourati, M ;

Bouaziz, J .

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 2004, 234 (1-3) :109-116

[10]

Merabet D., 2007, GLASS REINFORCEMENT, P78

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