Synthesis and characterization of nanosilica prepared by precipitation method

被引：142
|
作者：
Jal, PK
Sudarshan, M
Saha, A
Patel, S
Mishra, BK [1 ]
机构：
[1] Sambalpur Univ, Ctr Studies Surface Sci & Technol, Dept Chem, Jyoti Vihar 768019, India
[2] Calcutta Ctr, Inter Univ Consortium DAE Facil, Kolkata 700098, W Bengal, India
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2004年 / 240卷 / 1-3期
关键词：
precipitation; nanosilica; TEM; TGA; surface area;
D O I：
10.1016/j.colsurfa.2004.03.021
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：
Nanosilica was prepared by precipitation method and was characterized by various analytical tools. From transmission electron micrograph the silica particles are found to have almost spherical shape with a dimension of similar to50 nm. The surface area is found to be of 560 m(2) g(-1) and density 2.2 g cm(-3). From thermogravimetric analysis the total silanol density in the silica is found to be 7.68 nm(-2). A two tier hydration model is proposed from the results of thermogravimetric analysis. The number of reactive silanols that forms hydrogen bond with water molecules is found to be 2.48. The infrared spectral data supports the presence of hydrogen bonded silanol group and the siloxane groups in silica. (C) 2004 Elsevier B.V. All rights reserved.
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页码：173 / 178
页数：6
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