Synthesis and characterization of carbon sphere-silica core-shell structure and hollow silica spheres

被引:74
|
作者
Guo, Xingmei [1 ,2 ]
Liu, Xuguang [1 ,2 ]
Xu, Bingshe [2 ]
Dou, Tao [3 ]
机构
[1] Taiyuan Univ Technol, Coll Chem & Chem Engn, Taiyuan 030024, Peoples R China
[2] Taiyuan Univ Technol, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Peoples R China
[3] Taiyuan Univ Technol, Res Inst Special Chem, Taiyuan 030024, Peoples R China
关键词
Carbon sphere-silica; Core-shell; Hollow spheres; NANOPARTICLES; FABRICATION; MICROSPHERES; PARTICLES;
D O I
10.1016/j.colsurfa.2009.04.048
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
Carbon sphere-silica core-shell structured material was prepared in the presence of cetyltrimethylammonium bromide using tetraethyl orthosilicate as precursor of silica by a sol-gel method combined with Stober method. Carbon sphere cores with an average diameter of 300 nm were prepared by the pyrolysis of acetylene. After carbon sphere cores were removed by calcinations, hollow silica spheres with smooth surface and uniform shell thickness around 110nm were obtained. The core-shell structure of carbon sphere-silica composites and the hollow structure of silica spheres were characterized by FESEM, HRTEM, XRD, XPS and FTIR. The results indicate that the silica was coated on the surface of carbon spheres. The inner diameter of the hollow silica spheres with amorphous shell was about 290 nm. A possible formation mechanism of the core-shell structure of carbon sphere-silica and hollow silica spheres was proposed. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:141 / 146
页数:6
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