TY - JOUR
T1 - Molten salt synthesis of hierarchical porous N-doped carbon submicrospheres for multifunctional applications
T2 - High performance supercapacitor, dye removal and CO2 capture
AU - Li, Junyi
AU - Tian, Liang
AU - Liang, Feng
AU - Wang, Junkai
AU - Han, Lei
AU - Zhang, Jun
AU - Ge, Shengtao
AU - Dong, Longhao
AU - Zhang, Haijun
AU - Zhang, Shaowei
N1 - Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Hierarchical porous N-doped carbon submicrospheres (HPNCs) are synthesized at 1000 °C by a facile molten salt method using diaminomaleonitrile as a precursor, iron trichloride as a catalyst, and ZnCl2-KCl to form the molten salt medium. The results indicated that the pore structure of resultant HPNCs could be tuned by changing the amount of iron catalyst, and those prepared with adding 7.1 wt% FeCl3·6H2O showed the highest specific surface area (3155 m2/g) and largest hierarchical pore volume (2.2 cm3/g) with micropore and mesopore surface areas of 808 m2/g and 2347 m2/g, respectively, in addition to their high mesopore ratio up to 84.4%. The resultant HPNCs showed outstanding specific capacitance up to 455 F/g in 6 M KOH electrolyte solution at a current density of 0.5 A/g, a considerably high energy density of 93.6 Wh/kg and high capacitance retention of 95% after 5000 cycles. Moreover, they exhibited high adsorption capacities of 812.2 mg/g and 805.2 mg/g, for methylene blue and methyl orange adsorption, respectively, and high CO2 adsorption capacity of 3.4 mmol/g at 25 °C and at an equilibrium pressure of 1 bar.
AB - Hierarchical porous N-doped carbon submicrospheres (HPNCs) are synthesized at 1000 °C by a facile molten salt method using diaminomaleonitrile as a precursor, iron trichloride as a catalyst, and ZnCl2-KCl to form the molten salt medium. The results indicated that the pore structure of resultant HPNCs could be tuned by changing the amount of iron catalyst, and those prepared with adding 7.1 wt% FeCl3·6H2O showed the highest specific surface area (3155 m2/g) and largest hierarchical pore volume (2.2 cm3/g) with micropore and mesopore surface areas of 808 m2/g and 2347 m2/g, respectively, in addition to their high mesopore ratio up to 84.4%. The resultant HPNCs showed outstanding specific capacitance up to 455 F/g in 6 M KOH electrolyte solution at a current density of 0.5 A/g, a considerably high energy density of 93.6 Wh/kg and high capacitance retention of 95% after 5000 cycles. Moreover, they exhibited high adsorption capacities of 812.2 mg/g and 805.2 mg/g, for methylene blue and methyl orange adsorption, respectively, and high CO2 adsorption capacity of 3.4 mmol/g at 25 °C and at an equilibrium pressure of 1 bar.
KW - Adsorption
KW - Carbon submicrospheres
KW - Hierarchical-pore
KW - Molten salt
KW - Specific capacitance
UR - http://www.scopus.com/inward/record.url?scp=85055915123&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2018.09.061
DO - 10.1016/j.carbon.2018.09.061
M3 - Article
AN - SCOPUS:85055915123
SN - 0008-6223
VL - 141
SP - 739
EP - 747
JO - Carbon
JF - Carbon
ER -