Iron-intercalated molybdenum disulfide obtained from single-layer dispersion

Danot, M.; Mansot, Jean-Louis; Golub, A. S.; Protzenko, G.A.; Fabritchnyi, P.B.; Novikov, Yu. N.; Rouxel, J.

doi:10.1016/0025-5408(94)90003-5

Cited by 48 publications

(35 citation statements)

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“…The interaction of negatively charged molybdenum disulfide single layers in dispersions with the [Cu(phen) 2 Cl] + complex cation (I) was expected to pro ceed via two routes. The first of them is the formation of layered compounds [Cu(phen) 2 Cl] +…”

Section: Resultsmentioning

confidence: 99%

“…This is based on the earlier 9 observation of the reduction of Cu 2+ in aqueous solu tions of the copper salts by the (MoS 2 ) x-layers and a comparison of the redox potentials for the copper ions (Е(Cu 2+ /Cu + ) = +0.16 V) and for the complex under study (Е([Cu II (phen) 2 Cl] + /[Cu I (phen) 2 ] + ) = +0.30 V). 12 In complex I, the coordination sphere of the Cu 2+ ion contains four nitrogen atoms and one chlorine atom that form a distorted tetragonal pyramid ( Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In the present work, we used the copper(II) complex [Cu(phen) 2 Cl] + as an example to study the reduction effect of single layer dispersions on this compound and both routes of formation of layered MoS 2 compounds involving this complex.…”

mentioning

confidence: 99%

“…3). Taking into account the recent data 9 on the ability of the negatively charged MoS 2 layers to manifest reduction properties, we intended to study a possibility of reducing complex cations in single layer dispersions of molybdenum disulfide and reveal spe cific features of intercalation of cations, which can be reduced in this system via reaction (2) or (3).…”

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confidence: 99%

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Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

et al. 2005

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

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“…In all these cases, their conditions of synthesis correspond to low temperature conditions. For instance, the synthesis of a composite structure of iron hydroxide layers alternating with molybdenite layers, MoS2, has been obtained by Danot et al (1994) at ambient conditions. It has the formula: [0.5(Fe2~Ve~;)(OH)2] ~ (MoS2) ~ where trivalent Fe permits electron donation to the sulphide layer, as in yushkinite.…”

Section: Comparison With Other Natural and Synthetic Composite Hydroxmentioning

confidence: 99%

Re-examination of yushkinite: chemical composition, optical properties and interlayer charge transfer

Moëlo

Rouer²,

Cario

et al. 1999

Mineral. mag.

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The hydroxy-sulphide yushkinite from the type deposit has been re-examined by electron probe microanalysis and reflectance measurement. The EPMA indicates minor Cu (up to 1.5 wt.%) and confirms an excess of V. Taking into account its composite structm-e (brucite-like hydroxide layer alternating with a berndtite-type sulphide layer) the proposed structural formula is, with the addition of minor intercalated Cu: [(Mgo,71Alo.36Vo.03)El.lo(OH)2,1800.02 ]Cuo.02 [VS2]. At the crystal scale, some crystal edges give a variable excess of Si and A1 (in the 1/1 ratio), indicating a late topotactic intergrowth with a layered alumino-silicate (or a composite silicate-sulphide). New specular reflectance data are given in air and oil from 400 to 800 nm, with the polarization plane parallel or perpendicular to the elongation. The refractive index n and absorption coefficient k are given; no absorption band exists in the perpendicular position, with constant n close to 1.9, and k to 0.3. In a parallel position, a pseudo-transparency window is centred around 500-520 nm (-2.4 eV). The main absorption band, centred around 730 nm (-1.7 eV), corresponds probably to a transition t2g ~ eg related to intra-layer V -V bonding. Charge transfer from the brucite-type layer to the VSz one, strictly controlled throtigh H-bonding, induces a mean formal valency of V close to 3.6. Yushkinite is compared with other synthetic layered hydroxy-sulphides, as well as brucite-type intercalated compounds.KEYWORD$" yushkinite, hydroxy-sulphide, vanadium, electron microprobe data, specular reflectance data, charge transfer, hydrogen bonding. IntroductionYUSHKINITE is a complex lamellar hydroxysulphide of V discovered by Makeev et al. (1984) in quartz-calcite hydrothermal veins near the Sylova-Yaha river (Pai-Hoi anticlinorium, Komi Autonomous Republic, in the former Soviet Union). To date, this is the only known occurrence of yushkinite, and it has not been synthetized. Makeev et al. (1984) revealed the hybrid, non-commensurate character of the crystal structure of yushkinite, and showed that it was related to those of valleriite and tochilinite. In yushkinite, a brucite-like hydroxide layer alternates with a V-containing octahedral sulphide layer. Makeev et al. (1984) gave the structural formula:Organova (1989) proposed a new crystal chemical formula on the basis of the ratio of the t w o i n t r a -l a y e r s u b -c e l l s : Makovicky and Hyde (1992), in a general study of the group of minerals with incommensurate sandwiched layered structure ('2D-misfit compounds'), highlighted the close relationship between the sulphide layer of yushkinite and the pseudo-hexagonal VS2 layer of synthetic (PbS)I.12VS2, which is closely related to the layered structure of berndtite, SnS2.During the study of synthetic lanthanide-V sulphides of the misfit type (Carlo, 1998) compound close to (SmS)l.21VS2 revealed optical properties (purple colour and reflectance data) very similar to those of yushkinite. This led to the current re-examination of yushkinite, in order to u...

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The Modified Liquid‐Liquid Interface: The Effect of an Interfacial Layer of MoS₂ on Ion Transfer

2021

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MoS2 nanosheets have been assembled at the water|1,2‐dichlorobenzene (DCB) interface into uniform films, and the ion‐transfer properties investigated by voltammetry at the interface between immiscible electrolyte solutions. Remarkably, interfacial MoS2 films were found to enhance the simple and facilitated transfer of cationic species while restricting the transport of anionic species. The enhancement is attributed to a localised increase in the cationic concentration at the interface due to the adsorption onto the negatively charged surface of the exfoliated MoS2 nanosheets. Size‐selectivity for the cationic species was also recognized as a feature of such films. Characterisation of the interfacial film's structure revealed the inclusion of multiple emulsified droplets stabilised by MoS2, where the droplet number and size depend on the concentration of the MoS2 dispersion. Besides increasing the interfacial corrugation and area, the emulsified droplets are believed to influence the mass transport mechanism across the interface. Cyclic voltammetric measurements of saturated films suggested a capillary‐like structure of these films. While the capillaries/nanochannels allow them to have a degree of size‐selectivity that depends on the thickness/density of the film, they also affect the diffusion zones towards and away from the interface. Consequently, steady‐state conditions of mass transport similar to those found in solid‐state supported micro‐ITIES are observed in these nanofilms.

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Iron-intercalated molybdenum disulfide obtained from single-layer dispersion

Cited by 48 publications

References 10 publications

Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

Re-examination of yushkinite: chemical composition, optical properties and interlayer charge transfer

The Modified Liquid‐Liquid Interface: The Effect of an Interfacial Layer of MoS₂ on Ion Transfer

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Iron-intercalated molybdenum disulfide obtained from single-layer dispersion

Cited by 48 publications

References 10 publications

Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

Intercalation of molybdenum disulfide with chlorobis(phenanthroline)copper(II)

Re-examination of yushkinite: chemical composition, optical properties and interlayer charge transfer

The Modified Liquid‐Liquid Interface: The Effect of an Interfacial Layer of MoS2 on Ion Transfer

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The Modified Liquid‐Liquid Interface: The Effect of an Interfacial Layer of MoS₂ on Ion Transfer