Publication: Aerogel-copper nanocomposites prepared using the adsorption of a polyfluorinated complex from supercritical CO2
Program
KU-Authors
KU Authors
Co-Authors
Kostenko, Svetlana O.
Kurykin, Michael A.
Khrustalev, Victor N.
Khokhlov, Alexei R.
Zhang, Lichun
Aindow, Mark
Advisor
Publication Date
2012
Language
English
Type
Journal Article
Journal Title
Journal ISSN
Volume Title
Abstract
A supercritical deposition method has been used to synthesize aerogel-copper nanocomposites. Carbon, resorcinol-formaldehyde, and silica aerogels (CAs, RFAs, and SAs) were impregnated with a new polyfluorinated copper precursor (CuDI6), which has a high solubility in supercritical carbon dioxide (scCO(2)). Adsorption isotherms of CuDI6 onto various aerogels from scCO(2) were determined at 35 degrees C and 10.6 MPa using a batch method which is based on the measurement of the fluid phase concentration. The relative affinity between CuDI6 and different aerogels changed in the following order: CA > RFA > SA. The effect of temperature on the adsorption isotherms for the CuDI6-CO2-CA system was also studied at 35 and 55 degrees C and at a CO2 density of 736.1 kg/m(3). The CuDI6 uptake at a particular CuDI6 concentration increased with increasing temperature. Adsorbed CuDI6 was found to convert into Cu and Cu/Cu2O nanoparticles on the aerogel supports after chemical or thermal treatments at ambient pressure and at temperatures ranging from 200 to 400 degrees C.
Description
Source:
Journal of Nanoparticle Research
Publisher:
Springer
Keywords:
Subject
Chemistry, Nanoscience, Nanotechnology, Materials science