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Direct Synthesis of Microporous Bicarbazole-Based Covalent Triazine Frameworks for High-Performance Energy Storage and Carbon Dioxide Uptake.
ChemPlusChem ( IF 3.0 ) Pub Date : 2019-11-01 , DOI: 10.1002/cplu.201900635
Mohamed Gamal Mohamed,Ahmed F M El-Mahdy,Mahmoud M M Ahmed,Shiao-Wei Kuo

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 m2 /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 μA/0.5 cm2 . 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.

中文翻译:

直接合成基于微孔联咔唑的共价三嗪骨架,可实现高性能的能量存储和二氧化碳吸收。

在这项研究中,在电热条件下,由[9,9'-bicarbazole] -3,3',6,6'-四碳腈(Car-4CN)在离子热条件下合成了一系列基于联咔唑的共价三嗪骨架(Car-CTF)。熔融氯化锌的存在。热重分析和Brunauer-Emmett-Teller分析表明,这些Car-CTF具有出色的热稳定性和高比表面积(约1400 m2 / g)。通过循环伏安法研究的该Car-CTF系列的电化学性能显示出最高的电容(在5 mV / s时为545 F / g),在100μA/ 0.5的8000次循环后,也显示出96.1%的出色的哥伦布效率。平方厘米 其他Car-CTF样品显示出相似的效率。此外,根据对二氧化碳的吸收测量,其中一个系列显示出最高的二氧化碳吸收能力:3.91和7。在298 K和273 K下分别为60 mmol / g。这些结果表明了一种简单的制备CTF材料的方法,该材料可提供出色的电化学和CO2吸收性能。
更新日期:2019-11-21
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