Some Studies on the Synthesis and Characterization of Carbon Aerogel

Abstract

Publication details, including instructions for authors and subscription information: http://www.tandfonline.com/loi/tcer20 Trans. Ind. Ceram. Soc., 69 (2) 83-88 (2010).Porous carbon aerogels were synthesized from resorcinol-formaldehyde monomers using acetic acid, sodium carbonate and sodium hydroxide catalysts. The synthesized aerogels were characterized by XRD, TGA, SEM, BET and FTIR. The carbon aerogel developed by acetic acid catalyst produced a very high surface area (619.26 m 2 .g -1 ). All the different catalysts resulted in different surface morphology of the aerogels. The synthesized carbon aerogels contained significant amount of hydroxyl, carboxyl groups and different types of C-C linkages. These aerogels exhibited potential as adsorbents for removal of toxic materials and heavy metals.

Multifunctional Carbon Aerogels Derived by Sol–Gel Process of Natural Polysaccharides of Different Botanical Origin

“…Carbon aerogels are a special class of nanostructured and highly porous aerogels that have been known for about 28 years, and were prepared for the first time by the American scientist Richard W. Pekala and his colleagues at Lawrence Livermore National Laboratory [ 3 ]. In contrast to the conventional porous carbon materials, carbon aerogels have a continuous network structure of interconnected nanosized primary particles [ 4 ]. Furthermore, these ultralight carbon materials exhibit extraordinary properties, including well-defined and controlled porosity, large surface area, chemical stability, and low electrical resistance, which make them desirable materials for a wide range of technological applications (e.g., thermal insulation [ 5 , 6 , 7 ], heavy metal or organic solvents absorption [ 8 , 9 , 10 ], energy storage [ 11 , 12 , 13 , 14 ], catalyst supports [ 15 , 16 , 17 ], and biomedicine [ 18 , 19 , 20 ]).…”

Carbon aerogel and their polypyrrole composites used as capacitive materials

“…1395 cm −1 and 1555 cm −1 wavenumbers show CC and CN stretching. 2990 cm −1 and 3676 cm −1 wavenumbers shows CH 2 stretching mode and NH stretching, 2,20,21 605 cm −1 , 630 and 676 cm −1 wavenumbers showed the CC (CCH 2 ) stretching 42 . As can be understood from the stretch modes, the N bond is seen in the composites indicates the presence of pyrrole.…”

“…2810 and 2945 cm −1 wavenumbers show CH stretching. 3065 cm −1 , 3625 cm −1 and 3730 cm −1 wavenumbers indicating the OH group 42 …”

“…In particular, the peak in the 1555 cm −1 wavenumber is also a characteristic peak belonging to the pyrrole. 42 XRD analysis was performed to determine the crystal structures of the synthesized CA and PPy composites. XRD results are given in Figure 3 for CA1, CA2 and polypyrrole composites.…”

Catalytic Chemical Vapor Deposition Synthesis of Carbon Aerogels of High-Surface Area and Porosity

“…Carbon aerogels are usually synthesized by hightemperature pyrolysis of organic aerogels, which in turn are prepared by polymerization of two monomers (e.g., resorcinol-formaldehyde) using sol-gel methods and processing the resulting material under supercritical conditions [5,6]. This type of synthesis involves several steps under very diverse conditions.…”