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Issue 1, 2011
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Hydrothermal synthesis and structure evolution of hierarchical cobalt sulfide nanostructures

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Abstract

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)2·6H2O 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.

Graphical abstract: Hydrothermal synthesis and structure evolution of hierarchical cobalt sulfide nanostructures

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Publication details

The article was received on 26 Aug 2010, accepted on 07 Oct 2010 and first published on 18 Nov 2010


Article type: Paper
DOI: 10.1039/C0DT01107J
Citation: Dalton Trans., 2011,40, 243-248
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    Hydrothermal synthesis and structure evolution of hierarchical cobalt sulfide nanostructures

    W. Dong, X. Wang, B. Li, L. Wang, B. Chen, C. Li, X. Li, T. Zhang and Z. Shi, Dalton Trans., 2011, 40, 243
    DOI: 10.1039/C0DT01107J

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