Novel route to synthesize complex metal sulfides: Hydrothermal coupled dissolution−reprecipitation replacement reactions

F. Xia; J. Zhou; J. Brugger; Y. Ngothai; B. O’Neill; G. Chen; A. Pring

doi:10.1021/cm7033883

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Novel route to synthesize complex metal sulfides: Hydrothermal coupled dissolution−reprecipitation replacement reactions

Journal article

Peer reviewed

Novel route to synthesize complex metal sulfides: Hydrothermal coupled dissolution−reprecipitation replacement reactions

F. Xia, J. Zhou, J. Brugger, Y. Ngothai, B. O’Neill, G. Chen and A. Pring

Chemistry of Materials, Vol.20(8), pp.2809-2817

2008

DOI: https://doi.org/10.1021/cm7033883

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Abstract

A novel route for the synthesis of complex metal sulfides using hydrothermal coupled dissolution−reprecipitation reactions is reported. Two thiospinels, (Ni,Fe)3S4 (violarite) and Co3S4 (linnaeite), were synthesized using (Fe,Ni)9S8 (pentlandite) and Co9S8 (cobaltpentlandite) as precursors. The Fe/Ni ratio of (Ni,Fe)3S4 can be adjusted by varying the reaction conditions, for example, temperature (125–145 °C), pH (2.90, 3.90, 5.00), and precursor stoichiometry ((FexNi1−x)9S8, x = 0.4, 0.5, 0.55, 0.6). Pure (Ni,Fe)3S4 can be synthesized by utilizing a flow-through hydrothermal cell rather than a static hydrothermal cell as the fluid flow improves mass transfer and flushes away the Fe2O3 byproduct from the reaction front. Synthesis times range from 10 to 20 days, compared to the traditional dry synthesis route for (Ni,Fe)3S4 that requires 3 months annealing to obtain a product of only 72 ± 3 wt % purity. This synthesis route is ideal for preparing compounds with low thermal stabilities (<500 °C).

Details

Title: Novel route to synthesize complex metal sulfides: Hydrothermal coupled dissolution−reprecipitation replacement reactions
Authors/Creators: F. Xia (Author/Creator)
J. Zhou (Author/Creator)
J. Brugger (Author/Creator)
Y. Ngothai (Author/Creator)
B. O’Neill (Author/Creator)
G. Chen (Author/Creator)
A. Pring (Author/Creator)
Publication Details: Chemistry of Materials, Vol.20(8), pp.2809-2817
Publisher: American Chemical Society
Identifiers: 991005544033307891
Copyright: © 2008 American Chemical Society
Murdoch Affiliation: Murdoch University
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 8 Earth Sciences; 8.8 Geochemistry, Geophysics & Geology; 8.8.1 Geochemical Petrogenesis
Web Of Science research areas: Chemistry, Physical; Materials Science, Multidisciplinary
ESI research areas: Materials Science