Synthesis and Characterization of Copper-Doped Carbon Aerogels

We have prepared carbon aerogels (CAs) doped with copper through sol−gel polymerization of formaldehyde with the potassium salt of 2,4-dihydroxybenzoic acid, followed by ion exchange with Cu(NO3)2, supercritical drying with liquid CO2, and carbonization at 1050 °C under a N2 atmosphere. The material...

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Bibliographic Details
Published in:Langmuir 2002-09, Vol.18 (18), p.7073-7076
Main Authors: Baumann, Theodore F, Fox, Glenn A, Satcher, Joe H, Yoshizawa, Noriko, Fu, Ruowen, Dresselhaus, Mildred S
Format: Article
Language:English
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Summary:We have prepared carbon aerogels (CAs) doped with copper through sol−gel polymerization of formaldehyde with the potassium salt of 2,4-dihydroxybenzoic acid, followed by ion exchange with Cu(NO3)2, supercritical drying with liquid CO2, and carbonization at 1050 °C under a N2 atmosphere. The materials were characterized by elemental analysis, nitrogen adsorption, high-resolution transmission electron microscopy, and X-ray diffraction. Results obtained indicate that this approach is an effective method for controlling both the amount and the distribution of a desired metal species within the carbon framework. We also found that carbonization of the copper-doped organic aerogels results in the formation of spherical copper nanoparticles within the carbon framework of the aerogel. The copper nanoparticles have a cubic crystalline structure and range in size from 10 to 50 nm. The Cu-doped CAs retain the overall open cell structure of metal-free CAs, exhibiting high surface areas and pore diameters in the micro- and mesoporic region.
ISSN:0743-7463
1520-5827
DOI:10.1021/la0259003