材料科学
比表面积
化学工程
催化作用
扫描电子显微镜
X射线光电子能谱
打赌理论
碳纤维
亚甲蓝
石墨烯
煅烧
拉曼光谱
电化学
透射电子显微镜
无机化学
纳米技术
光催化
化学
电极
有机化学
复合材料
物理化学
物理
光学
复合数
工程类
作者
Junfeng Miao,Zuozhao Zhai,Shasha Wang,Yuelong Xu,Shichao Du,Xiaolei Wang,Xiaoxi Dong,Bin Ren,Zhenfa Liu
标识
DOI:10.1016/j.jclepro.2022.133369
摘要
The hierarchical porous nitrogen-doped two-dimensional carbon (HNGC) was prepared by simple calcination of magnesium sulfate (MgSO4) and self-synthesized nitrogen-doped two-dimensional graphene-like carbon at a mild temperature in oxygen. The influence MgSO4 on the morphology, structure and chemical composition of the prepared HNGC samples were studied using scanning electron microscopy, transmission electron microscopy, X-ray diffraction, Raman spectroscopy, surface area analysis, X-ray photoelectron microscopy and elemental analyzer. HNGC-2 exhibited a uniform three-dimensional coral-like porous inter-connected structure, large specific surface area, high pore volume, and no loss of nitrogen content. HNGC-2 demonstrated an excellent rate capability of 62.8% at 20 A g−1, outstanding stability of 96.1% following 5000 cycles and the assembled symmetric supercapcitor achieved 12.5 Wh kg−1 at a 350 Wkg-1 and 7.5 Wh kg−1 at 3500 Wkg-1. The novel method was also found to be effective for facilitating the electrochemical performance of commercial biomass active carbon. In addition, HNGC-2 was used for the photo-catalytic degradation of methylene blue and over 99% of methylene blue was successfully degraded under 25-min visible irradiation in the presence of potassium persulfate. The enhanced electrochemical performance and the excellent photo-catalytic performance of HNGC-2 indicated that porous carbon can be successfully activated using an appropriate oxidation strategy.
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