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The Cu-doped SiO2 composite aerogels were successfully prepared by sol–gel process and subsequently supercritical drying with ethanol and CO2. The Cu-doped SiO2 composite aerogels had porous texture, low density (<100 mg cm−3) and high specific surface area (>800 m2 g−1), which were investigated by FESEM and nitrogen adsorption desorption porosimetry. The FTIR spectra of the aerogels showed...
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