Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 20, Issue 24, Pages 5080-5085Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm00050g
Keywords
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Funding
- National Natural Science Foundation of China [20903025]
- Scientific Research Foundation for Returned Scholars
- Ministry of Education of China [20091001]
- Science Foundation for the Excellent Youth Scholars of Beijing Institute of Technology [2008Y0411]
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The organic conducting PEDOT-PSS aerogels can be prepared by supercritical CO2 drying of metal ion crosslinked PEDOT-PSS supermolecular hydrogels. The PEDOT-PSS hydrogel precursors were synthesized by polymerizing 3,4-ethylenedioxythiophene with excess ferric nitrate as oxidizing agent as well as crosslinking agent in the presence of poly(sodium 4-styrenesulfonate). The supermolecular crosslinking mechanism of the hydrogel precursors and the chemical composition of the resulting aerogels were revealed by X-ray photoelectron spectroscopy (XPS). The molecular structure of the resulting PEDOT-PSS aerogels was further confirmed by Raman and infra-red spectroscopy. The morphology and textural properties of the resultant aerogels were investigated by scanning electron microscopy (SEM), nitrogen adsorption/desorption, and X-ray powder diffraction (XRD) tests, respectively. The resulting aerogels show light weight (0.138-0.232 g cm(-3)), large BET surface area (170-370 m(2) g(-1)) and hierarchically porous structure with wide pore size distribution. The large surface area and wide pore size distribution, together with their electro-optical properties, would allow these organic conducting aerogels to be applied in many fields with unexpected performance.
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