A Simple and Efficient Route to Prepare Inorganic Compound/Polymer Composites in Supercritical Fluids
✍ Scribed by Jiaqiu Wang; Chengliang Zhang; Zhimin Liu; Kunlun Ding; Zhenzhong Yang
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 237 KB
- Volume
- 27
- Category
- Article
- ISSN
- 1022-1336
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✦ Synopsis
Abstract
Summary: A simple and efficient route to prepare inorganic compound/polymer composites in CO~2~‐based supercritical solution is presented. By this method, using polymeric hollow spheres as a substrate and Eu(NO~3~)~3~ as precursor, Eu~2~O~3~/polymer composites are successfully fabricated via the decomposition of the precursor in a supercritical CO~2~/ethanol mixture at 120 °C. The resulting composites are characterized by means of transmission electron microscopy, X‐ray diffraction, and X‐ray photoelectron spectroscopy. It is indicated that besides being decorated on the outer surface of the polymer spheres, Eu~2~O~3~ nanoparticles are imbedded in the shell and further into the hollow cavity of the polymer spheres. The loading content and particle size of Eu~2~O~3~ on the polymer spheres can be controlled by changing the concentration of precursor in the solutions. The photoluminescence spectrum of the composites exhibit two peaks at 592 and 615 nm, which indicates that the composites can be used as optical material to emit red light. This method is also extended to the preparation of other inorganic compound/polymer composites with different functions.
Eu~2~O~3~ nanoparticles are decorated on the outer surface of the polymer spheres.
magnified imageEu~2~O~3~ nanoparticles are decorated on the outer surface of the polymer spheres.