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Journal of Nanomaterials
Volume 2013 (2013), Article ID 843570, 4 pages
http://dx.doi.org/10.1155/2013/843570
Research Article

One-Step Synthesis and Characterization of Silica Nano-/Submicron Spheres by Catalyst-Assisted Pyrolysis of a Preceramic Polymer

1School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
2School of Science, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received 2 May 2013; Accepted 17 June 2013

Academic Editor: Renzhi Ma

Copyright © 2013 Feng Gao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Silica nanospheres have attracted tremendous interest due to their importance in extensive applications. However, the direct large-scale fabrication of silica nanospheres with controlled morphology and high purity remains a significant challenge. In this work, silica nano-/submicron spheres were successfully synthesized by a simple method through pyrolysis of an amorphous polysilazane preceramic powder with catalyst FeCl2. The synthesized spheres possess well-designed shape with diameter of 600–800 nm and high purity. The surfaces of the spheres are smooth and clean without any flaws. Besides, the spheres are identified as amorphous silica, and their growth mechanism was also proposed.