热重分析
超级电容器
材料科学
循环伏安法
沸石咪唑盐骨架
硫化钴
电极
化学工程
钴
电化学
硫化物
纳米孔
扫描电子显微镜
电解质
硫化
介电谱
无机化学
金属有机骨架
化学
纳米技术
复合材料
有机化学
冶金
吸附
硫黄
物理化学
工程类
作者
Rabia Shabir Ahmad,Naseem Iqbal,Tayyaba Noor
出处
期刊:Materials
[MDPI AG]
日期:2019-09-11
卷期号:12 (18): 2940-2940
被引量:18
摘要
Zeolitic Imidazolate Framework (ZIF-67) was prepared in two different solvents—water and methanol. Nanoporous carbon was derived from ZIF-67 via pyrolysis in an inert atmosphere. Anion exchange step of sulfidation on the synthesized material has a great influence on the structure and properties. Structural morphology and thermal stability were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM)/energy dispersive x-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET), and thermogravimetric (TG) analysis. The electrochemical analysis was evaluated by cyclic voltammetry, chronopotentiometry, and impedance analysis. The as-prepared nanoporous carbon and cobalt sulfide (NPC/CS) electrode material (water) in 2M KOH electrolyte solution exhibit high specific capacitance of 677 F/g. The excellent electrochemical performance of the NPC/CS was attributed to its hierarchical structure. This functionalized ZIF driven strategy paves the way to the preparation of various metal oxide and metal sulfide-based nanoheterostructures by varying the type of metal.
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