Nitrogen-doped porous carbon foams prepared from mesophase pitch through graphitic carbon nitride nanosheet templates

作者：Xie, Rui-Lun; Zong, Zhi-Min^*; Liu, Fang-Jing; Wang, Yu-Gao; Yan, Hui-Long; Wei, Zhe-Hao; Mayyas, Mohannad; Wei, Xian-Yong

来源：RSC Advances, 2015, 5(57): 45718-45724.

DOI：10.1039/c4ra14513e

• HIGH-PERFORMANCE SUPERCAPACITORS
• CHEMICAL-VAPOR-DEPOSITION
• ORDERED MESOPOROUS CARBON
• CO2 CAPTURE
• FUNCTIONAL-GROUPS
• FACILE SYNTHESIS
• GRAPHENE SHEETS
• LITHIUM STORAGE
• ELECTROCATALYSIS
• ELECTROLYTE

A scalable and facile method was developed to synthesize nitrogen-doped porous carbon foams (NDPCFs) using graphitic carbon nitride (g-C3N4) nanosheets as hard templates through the calcination of mesophase pitch. The morphology, structure, chemical composition and electrochemical performance of the as-prepared NDPCFs were characterized and investigated. The results show that NDPCFs are fabricated from crimpled and folded carbon nanosheets and have a three-dimensional interconnected structure. The carbon nanosheets show a certain degree of orientation of graphite crystallites. The specific surface area, wall thickness and nitrogen content are controllable by tuning the mass ratio of g-C3N4 nanosheets to mesophase pitch. The content of nitrogen species, most of which are quaternary-N and pyridinic-N components, significantly decreases from 6.48 to 0.74 at% with raising calcination temperature from 800 to 1600 degrees C. The NDPCFs prepared at 800 degrees C have a high specific surface area of 2098 m(2) g(-1), an ultra-large pore volume of 5.048 cm(3) g(-1) and a high nitrogen content of 6.48 at%. Furthermore, this material exhibits remarkable electrochemical performance as an electrode material for supercapacitors with a specific capacitance of 125.6 F g(-1) even at a high scan rate of 200 mV s(-1).

• 出版日期2015
• 单位中国矿业大学（北京）