Pulsed-laser-induced synthesis of nickel sulphides in sulphur-containing liquids

Anischik, V.M.; Markevich, M. I.; Piskunov, F.A.; Yanushkevich, V. A.

doi:10.1016/s0040-6090(94)06496-2

Cited by 8 publications

(7 citation statements)

References 4 publications

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“…31 Conventional solid state reactions for 6-8 months at low temperatures (200-300 °C) as well as other lowtemperature procedures have invariably resulted in the formation of impurity phases. 15,16,32,33 Interestingly, the ambient temperature procedure described in this study is able to access singlephase Ni 3 S 4 . However, it disproportionates on heating at higher temperatures T > 100 °C (Figure 4) to give other phases.…”

Section: Resultsmentioning

confidence: 88%

Synthesis of Nickel Sulfides in Aqueous Solutions Using Sodium Dithionite

Jeong

Manthiram

2000

Inorg. Chem.

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Reaction of nickel chloride with sodium dithionite in aqueous solutions at ambient temperature has been investigated systematically to obtain nickel sulfides. The products are characterized by X-ray diffraction, thermogravimetric analysis, and electrical resistivity and magnetic susceptibility measurements. It is found that the compositions and structures of the products are controlled by the reaction pH and the amount of the reactants. While reactions under highly acidic (pH < or = 2) and basic (pH > or = 7) conditions yield crystalline sulfur and amorphous or poorly crystalline NiySx, respectively, those at intermediate 3 < or = pH < or = 6 give crystalline NiySx. Both crystalline Ni3S2 (heazlewoodite structure) and Ni3S4 (spinel structure) have been obtained at room temperature. Additionally, NiS (millerite structure) is obtained by carefully heating Ni3S4 at 200 degrees C in a mixture of 90% Ar and 10% H2. Ni3S4 is found to be metastable, and it begins to disproportionate above 100 degrees C. Both Ni3S2 and Ni3S4 show metallic behavior. While Ni3S2 exhibits temperature-independent magnetic susceptibility, Ni3S4 shows ferrimagnetic ordering below 20 K.

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Section: Resultsmentioning

confidence: 88%

Synthesis of Nickel Sulfides in Aqueous Solutions Using Sodium Dithionite

Jeong

Manthiram

2000

Inorg. Chem.

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“…Ni(en) 3 S 4 Û NiS 2 + 2S + 3en (14) Ni(en) 3 S 4 Û NiS 2 + NiS + NiS 1.03 +S + en (15) The further decomposition of NiS 2 into NiS(M) and NiS 1.03 (trace content) phases is possible as suggested by XRD data when the temperature is increased to 200 C (Eqs. 9±11).…”

Section: Possible Reaction Mechanism Phase Formation and Transformamentioning

confidence: 96%

“…Metastable Ni 3 S 4 single phase was obtained recently by an ambient temperature reaction between aqueous NiCl 2 and Na 2 S 2 O 4 solutions. [14] Anischik et al [15] reported a pulsed-laser-induced synthesis of nickel sulfides by pulsed laser on nickel disks in sulfur-containing liquids. They observed that the products are NiS and Ni 3 S 4 phases and the phase composition of the surface products is highly dependent on the laser irradiation power density.…”

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confidence: 99%

“…They observed that the products are NiS and Ni 3 S 4 phases and the phase composition of the surface products is highly dependent on the laser irradiation power density. [15] Hexagonal NiS films were deposited on Si(111) and Al 2 O 3 (012) substrates by using pulsed laser ablation. [16] It is worth noting that investigations of laser-induced reactions for synthesis of materials have mainly focused on the interactions at vapor±solid interfaces but recently attempts have been made to explore the possibilities of synthesizing new materials by pulsed-laser-induced reactions at We have demonstrated a soft solution-processing route for selective synthesis of various phases of nickel sulfides, in which a novel liquid±solid interfacial reaction between a nickel substrate and sulfur is involved, and the reaction of the Ni 2+ ion with sulfur in different solvents at low temperatures (£ 200 C).…”

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confidence: 99%

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Fabrication of Powders and Thin Films of Various Nickel Sulfides by Soft Solution-Processing Routes

Yoshimura²

2002

Adv. Funct. Mater.

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We have demonstrated a soft solution‐processing route for selective synthesis of various phases of nickel sulfides, in which a novel liquid–solid interfacial reaction between a nickel substrate and sulfur is involved, and the reaction of the Ni2+ ion with sulfur in different solvents at low temperatures (≤ 200 °C). Nanostructured Ni3S2 thin films, NiS (millerite) nanowhiskers, and NiS2 single crystals with dodecahedron {101} unit polytype shape were directly synthesized in ethylenediamine. Similar reactions in other solvents were also investigated. In addition, a new molecular precursor Ni(en)xSy (where (en) is the ethylenediamine ligand) with the composition Ni(en)3S4 derived in ethylenediamine was found to be an excellent precursor for synthesis of nickel sulfide nanoparticles. The reaction mechanism, phase formation, and transformation process are proposed. Nickel sulfide materials with different phases and special shapes could find applications in catalysis, semiconductors, and magnetic devices.

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“…Among these are solid-state reactions [24,25], physical vapor and atomic layer depositions [14,26], laserinduced reactions [27], electrochemical processes [8], solvo-and hydrothermal routes [2,4,[11][12][13], spray pyrolysis [16], solution-based processes at room temperature [6,22], or microwave-assisted syntheses [3,5].…”

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confidence: 99%

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

et al. 2017

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Nickel sulfide thin films and nanocrystals stabilized with oleylamine ligands are prepared from two different nickel xanthates as single-source precursors, which decompose at approx. 180°C, and are thereby converted into nickel sulfide. These nickel xanthates comprise branched alkyl moieties allowing the choice of a wide range of nonpolar organic solvents for the processing to nickel sulfide thin films as well as to nanoparticles. The crystal structures of both compounds show a typical square-planar coordination of the sulfur atoms of both xanthates to the nickel central atom. The thermal decomposition via the Chugaev reaction forming nickel sulfide was studied by thermal gravimetric analysis showing the reaction taking place at about 180°C. Consequently, by thermally converting spin-coated metal xanthate films directly on the substrates in the solid state, thin films consisting of hexagonal nickel sulfide are formed. If the nickel xanthates are heated in an oleylamine solution, oleylaminecapped nickel sulfide nanocrystals are obtained, exhibiting hexagonal NiS as main phase and Ni 3 S 4 as secondary phase. This is also reflected in a sulfur-rich composition of the synthesized nickel sulfide nanocrystals as observed from TEM-EDX analyses.

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Pulsed-laser-induced synthesis of nickel sulphides in sulphur-containing liquids

Cited by 8 publications

References 4 publications

Synthesis of Nickel Sulfides in Aqueous Solutions Using Sodium Dithionite

Synthesis of Nickel Sulfides in Aqueous Solutions Using Sodium Dithionite

Fabrication of Powders and Thin Films of Various Nickel Sulfides by Soft Solution-Processing Routes

Nickel sulfide thin films and nanocrystals synthesized from nickel xanthate precursors

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