Abstract
A cost-effective nitrogen-doped super high surface area carbon cryogel has been successfully synthesized from phenol–urea–formaldehyde (PUF) resin. Pore structure and chemical characteristics were investigated using scanning electron microscopy, Fourier transform infrared spectroscopy, element analysis, X-ray photoelectron spectrometry, mercury porosimetry and N2 adsorption–desorption. It was found that the organic cryogel with mesopores and macropores from PUF resin having a N content of 9.03 wt%, which is an ideal precursor for preparing N-doped carbon cryogels. The carbon cryogel obtained having a high apparent surface area of up to 1710 m2/g, large micropore volumes up to 0.64 cm3/g, a small average micropore width of 1.04 nm and a moderate nitrogen content of 2.08 wt%. The lab-made carbon cryogel showed good CO2/N2 sorption selectivity, 15.8:1 at 273 K and 16.4:1 at 298 K. The CO2 capture capacities as high as 5.5 mmol/g at 273 K and 4.5 mmol/g at 298 K up to 1 bar were obtained, which were among the highest compared to other commercial carbon materials.
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The present research was supported by the National Natural Science Foundation of China (31300488) and the Fujian Agriculture and Forestry University Fund for Distinguished Young Scholars (xjq201420).
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Li, Z., Chen, T., Wu, X. et al. Nitrogen-containing high surface area carbon cryogel from co-condensed phenol–urea–formaldehyde resin for CO2 capture. J Porous Mater 26, 847–854 (2019). https://doi.org/10.1007/s10934-018-0680-6
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DOI: https://doi.org/10.1007/s10934-018-0680-6