Aerogel–copper nanocomposites prepared using the adsorption of a polyfluorinated complex from supercritical CO2
Source abstract
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 (scCO2). Adsorption isotherms of CuDI6 onto various aerogels from scCO2 were determined at 35 °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 °C and at a CO2 density of 736.1 kg/m3. 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 °C.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aerogels and thermal insulation · Phase Equilibria and Thermodynamics · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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