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Issue 35, 2013
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(NH4)2S, a highly reactive molecular precursor for low temperature anion exchange reactions in nanoparticles

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Abstract

Ammonium sulfide ((NH4)2S) exhibits high reactivity as a sulfide reagent in anion exchange reactions that transform CoO to cobalt sulfide nanoparticles (NPs). The faster diffusion of Co2+ and O2− than the incoming S2− during the anion exchange causes a significant expansion of the NP voids. The low temperature (70 °C) anion exchange reaction produces amorphous cobalt sulfide NPs with Co : S ratio of ca. 3 : 4, which are converted into crystalline NPs with a major phase of cubic Co3S4 by annealing at high temperature in an organic solution.

Graphical abstract: (NH4)2S, a highly reactive molecular precursor for low temperature anion exchange reactions in nanoparticles

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Publication details

The article was received on 25 Mar 2013, accepted on 03 Jun 2013 and first published on 03 Jun 2013


Article type: Communication
DOI: 10.1039/C3DT50803J
Citation: Dalton Trans., 2013,42, 12596-12599
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    (NH4)2S, a highly reactive molecular precursor for low temperature anion exchange reactions in nanoparticles

    H. Zhang, L. V. Solomon, D. Ha, S. Honrao, R. G. Hennig and R. D. Robinson, Dalton Trans., 2013, 42, 12596
    DOI: 10.1039/C3DT50803J

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