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Exhaust gas based nanoarchitectonics for porous carbon materials for high-performance supercapacitor
Juan Du,Aibing Chen,Xueqing Gao,Haixia Wu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Pyrolyzing carbon precursors will also lead to a large amount of exhaust gas, which is a waste ofresources and a huge pollution. Therefore, realizing the full utilization of exhaust gas from carbon precursorsis significant. Herein, cobalt (Co) modified hard templates with micropores or mesopores is used toprepare porous carbon for supercapacitors, in which Co species provide the active sites for the captureand deposition of exhaust gas derived from zeoliticimidazolate framework. Using N2 as protective andcarrier gas, the whole process can be realized in a simple tubular furnace. The obtained PC can replicatethe morphology and pore structure of the hard template with the characteristics of micropores or mesoporesrespectively. The microporous structure of PC gives it higher surface area and pore volume than PCwith mesopores, which makes it have high capacitance of 445.7 F g1 in supercapacitor.
Juan Du,Lei Liu,Yifeng Yu,Yue Zhang,Aibing Chen 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.76 No.-
A self-assembly method using ionic liquids as soft-template and nitrogen precursor, resin as carbonprecursor, silica as assistant agent, mesoporous resin spheres as additive, is employed to prepare Ndopedcore–shell mesoporous sphere and carbon sheet composite (N-CMCS/CS). The obtained N-CMCS/CS possesses thin sheet, core–shell spheres, dual-mesoporous structure, large specific area and a certainof N-doping, which endows it with superior electrochemical performance as electrode material insupercapacitor.
Synthesis of N-doped Carbon Spheres Using Extended Stöber Method for SO2 Adsorption
Yunqian Li,Yifeng Yu,Lei Liu,Hongliang Zhang,Guoxu Wang,Aibing Chen 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.1
SO2 is one of the major pollutants in the atmosphere. N-doped microporous carbon spheres (NCS) have been demonstrated to be effective for SO2 adsorption. Here we report the synthesis of monodispersed NCS by the extended Stöber method with urea resorcinol-formaldehyde resins as carbon source, urea as nitrogen source and ammonia as catalyst in an ethanol-water mixed solvent. The obtained carbon spheres show a uniform diameter of around 550 nm, specific surface area of 476 m2 g-1, micropores pore volume of 0.20 cm3 g-1 and nitrogen doping. The NCS manifest special performance for SO2 capture with capability of 75.34 mg g-1 and good cycling stability, due to the large surface area, abundant micropores and nitrogen functionality.