期刊
DALTON TRANSACTIONS
卷 40, 期 1, 页码 243-248出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0dt01107j
关键词
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资金
- Natural Science Foundation of China [50972130, 20701033, 10874153, 50772100, 20901081]
- Chinese Academy of Sciences, China Post-doctoral Science Foundation [20090450292]
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
- Jilin University
- Open Project Program of Key Laboratory of Photochemical Conversion and Optoelectronic Materials
- Technical Institute of Physics and Chemistry
- Chinese Academy of Sciences
- Zhengjiang Top Academic Discipline of Applied Chemistry and Eco-Dyeing Finishing [YR2010004]
Hierarchical and well-defined cobalt sulfide with flower-like, cube-like, ball-like, and surface hollowed-out nanostructures were successfully prepared by a facile one-pot hydrothermal synthesis approach, employing Co(NO3)(2)center dot 6H(2)O as a cobalt precursor and thiourea as a sulfur source. The morphologies of these structures can be easily controlled by simply adjusting the molar ratio of reactants and solvents, reaction time, reaction temperature, and ligand types. Thiourea plays two important roles in the growth process of CoS nanostructures. First, it is decomposed to produce S2- for the final formation of CoS. On the other hand, it serves as a structure-directing agent to control the crystalline growth of CoS. The electrochemical capacitance performances of the CoS nanostructures were studied, and the flower-like CoS nanostructures show the best charge-discharge performance among all CoS products with the highest specific capacitance values of 389 F g(-1) at current density of 5 mA cm(-2), and 277 F g(-1) at higher current density of 50 mA cm(-2).
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