Tuning of ZIF-Derived Carbon with High Activity, Nitrogen Functionality, and Yield - A Case for Superior CO2 Capture.
A highly effective and facile synthesis route is developed to create and tailor metal-decorated and nitrogen-functionalized active microporous carbon materials from ZIF-8. Clear metal- and pyrrolic-N-induced enhancements of the cyclic CO2 uptake capacities and binding energies are achieved, particularly at a much lower carbonization temperature of 700 °C than those often reported (1000 °C). The high-temperature carbonization can enhance the porosity but only at the expense of considerable losses of sample yield and metal and N functional sites. The findings are comparatively discussed with carbons derived from metal-organic frameworks (MOFs) reported previously. Furthermore, the porosity of the MOF-derived carbon is critically dependent on the structure of the precursor MOF and the crystal growth. The current strategy offers a new and effective route for the creation and tuning of highly active and functionalized carbon structures in high yields and with low energy consumption.
Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ (UK). gsrinivasphys@gmail.com.
Srinivas
S
Gadipelli
Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ (UK). z.x.guo@ucl.ac.uk.
Zheng Xiao
ZX
Guo
D000327:Adsorption; D002244:Carbon / Q000737:chemistry*; D002245:Carbon Dioxide / Q000737:chemistry* / Q000302:isolation & purification*; D007093:Imidazoles / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D058608:Nanopores; D009584:Nitrogen / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
D007093:Imidazoles; D017641:Zeolites; D002245:Carbon Dioxide; D002244:Carbon; C029899:imidazole; D009584:Nitrogen
adsorption; carbon; carbon storage; metal-organic frameworks; zinc