Synthesis of silica powders by pressured carbonation

被引：76

作者：

Cai, X. ^{[1
,2
]}

Hong, R. Y. ^{[1
,2
,3
]}

Wang, L. S. ^{[1
,2
]}

Wang, X. Y. ^{[1
,2
,4
]}

Li, H. Z. ^{[3
]}

Zheng, Y. ^{[5
]}

Wei, D. G. ^{[6
]}

机构：

[1] Soochow Univ, SIP, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

[2] Soochow Univ, SIP, Key Lab Organ Synth jiangsu Prov, Suzhou 215123, Peoples R China

[3] Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100080, Peoples R China

[4] SND, Akzo Nobel NV Suzhou, Suzhou 215008, Jiangsu, Peoples R China

[5] Univ New Brunswick, Dept Chem Engn, Fredericton, NB E3B 5A3, Canada

[6] Harvard Univ, Sch Engn & Appl Sci, Ctr Nanoscale Syst, Cambridge, MA 02139 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2009年 / 151卷 / 1-3期

基金：

中国国家自然科学基金;

关键词：

Silica; Pressured carbonation; Carbon dioxide (CO2); Surfactant; NANOPARTICLES; PARTICLES; ROUTE; FINE;

D O I：

10.1016/j.cej.2009.03.060

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

A method was proposed for the preparation of silica powders using inexpensive material of sodium silicate (Na2SiO3) and carbon dioxide (CO2) by pressured carbonation, in which carbon dioxide acted as a precipitating reagent. Microstructure and size analyses of the precipitated silica powders were carried out using transmission electron microscopy and dynamic light scattering. The average particle size, size distribution and yield of silica powders were affected by reaction time, temperature and concentrations of surfactant and sodium silicate solutions. The particle size of silica powders increased with reaction temperature and concentration of sodium silicate, and the yield of silica powders increased with increasing reaction time. The size distribution of silica powders was affected by concentration of surfactant PEG. The optimal preparation conditions were experimentally determined for obtaining the silica powders with nanometer size, narrow size distribution, spherical shape and high purity without sodium carbonate and surfactant. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：380 / 386

页数：7

共 30 条

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SYNTHESIS OF NANOSIZE SILICA IN AEROSOL OT REVERSE MICROEMULSIONS [J].