Journal
CHEMPLUSCHEM
Volume 84, Issue 11, Pages 1767-1774Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.201900635
Keywords
carbazole; carbon dioxide capture; covalent triazine frameworks; microporous polymers; supercapacitors
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Funding
- Ministry of Science and Technology, Taiwan [MOST 106-2221-E-110-067-MY3, 105-2221-E-110-092-MY3, and 108-2218-E-110-013-MY3] Funding Source: Medline
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In this study a series of bicarbazole-based covalent triazine frameworks (Car-CTFs) were synthesized under ionothermal conditions from [9,9'-bicarbazole]-3,3',6,6'-tetracarbonitrile (Car-4CN) in the presence of molten zinc chloride. Thermogravimetric and Brunauer-Emmett-Teller analyses revealed that these Car-CTFs possessed excellent thermal stabilities and high specific surface areas (ca. 1400 m(2)/g). The electrochemical performances of this Car-CTF series, investigated by using cyclic voltammetry, showed a highest capacitance of (545 F/g at 5 mV/s), which also exhibited excellent columbic efficiencies of 96.1 % after 8000 cycles at 100 mu A/0.5 cm(2). The other Car-CTF samples displayed similar efficiencies. Furthermore, based on CO2 uptake measurements, one of the series showed the highest CO2 uptake capacities: 3.91 and 7.60 mmol/g at 298 and 273 K, respectively. These results suggest a simple method for the preparation of CTF materials that provide excellent electrochemical and CO2 uptake performance.
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