Details

Autor(en) / Beteiligte

• Zhang, Haitao
• Solomon, Louis V
• Ha, Don-Hyung
• Honrao, Shreyas
• Hennig, Richard G
• Robinson, Richard D

Titel

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

Ist Teil von

• Dalton transactions : an international journal of inorganic chemistry, 2013-09, Vol.42 (35), p.12596-12599

Ort / Verlag

England

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• 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 Co(2+) and O(2-) than the incoming S(2-) 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.