Synthesis and characterization of antimony oxide nanoparticles
- PDF / 186,161 Bytes
- 3 Pages / 612 x 792 pts (letter) Page_size
- 74 Downloads / 275 Views
Lin Guo Department of Chemistry, Hong Kong University, Hong Kong, People’s Republic of China
Wendong Wang Beijing Laboratory of Electron Microscopy, Institute of Physics and Center for Condensed Matter Physics, Chinese Academy of Science, P.O. Box 2724, Beijing 1000080, People’s Republic of China (Received 21 March 2000; accepted 3 January 2001)
Antimony oxide nanoparticles were synthesized in the presence of the polyvinyl alcohol in water solution through the reaction between SbCl3 and NaOH. The size of the particle ranges from 10 to 80 nm, and the largest one can even reach 200 nm, which may begin to grow in the initial stage of the reflux. Transmission electron microscopy and high-resolution electron microscopy (HREM) were used to characterize the microstructure of these nanoparticles. Using silicon single crystals as internal standards, the polycrystalline diffraction pattern analysis shows only presence of cubic Sb2O3 phase. The bright-field micrograph displays that the particles may have various polyhedral configurations. HREM results show that the particles are crystallographically perfect. Moreover, the formation mechanism of nanoparticles is discussed.
I. INTRODUCTION
Nanostructure materials are known to possess properties or combination properties that can be novel or even outstanding. Crystallites with nanometer dimensions demonstrate a host of unusual properties that set them apart from both extended and molecular materials. Semiconductor nanocrystaline material has been an area of intense investigation, and there has been much effort focused on the synthesis, structure, and properties. One particularly interesting aspect, in terms of variety of properties and applications, is the investigation of semiconductor metal oxide nanocrystals. The nanostructure material is still an attractive research topic.1–4 Antimony oxide is useful for flame retardants by using it together with halogen-containing resin and halogenated flame retardant. Extremely fine particles of colloidal antinomy phenoxide have wide application as optic materials because of their high refractive index and high abrasive resistance. And recently some authors reported hydrous antinomy oxide to exhibit high proton conductivity, and these compounds are likely to be extremely useful in humidity-sensing materials.5,6
a)
Address all correspondence to this author. e-mail: [email protected] J. Mater. Res., Vol. 16, No. 3, Mar 2001
http://journals.cambridge.org
Downloaded: 21 Jan 2015
In this paper we report the synthesis of antimony oxide nanoparticles by microemulsion and furthermore characterize it by TEM and HREM. To our knowledge the formation of antimony oxide nanoparticles modified by using PVA as stabilizer and analysis of antimony oxide nanoparticles by TEM techniques have not been reported.
II. EXPERIMENTAL
The procedures for the synthesis of antimony oxide nanoparticles were as the following: The remarkable features are that the polymer PVA was used. A 228-mg amount of SbCl3 was dissolved into 100 ml of hydrochloric acid with a
Data Loading...
