A comparison of MoS 2 catalysts hydrothermally synthesized from different sulfur precursors in their morphology and hydrodeoxygenation activity

Liu, Yan; Wu, Kui; Guo, Xuanlin; Wang, Weiyan; Yang, Yong

doi:10.1016/s1872-5813(18)30023-9

Cited by 15 publications

(8 citation statements)

References 28 publications

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“…MoS 2 was synthesized by hydrothermal route [62] ammonium hepta molybdate and thiourea were used as a precursor. Ammonium hepta molybdate (1.5 mmol) and thiourea (22 mmol) were dispersed in 40 mL of double distilled water and stirred for 2 hours.…”

Section: Synthesis Of Mos 2 and Mos 2 -Rgomentioning

confidence: 99%

Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

et al. 2022

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For increasing demands of clean and sustainable energy, two-dimensional transition-metal dichalcogenides (2D-TMDs) have attracted great attention. Electrocatalysis, photoelectrochemical water splitting and photovoltaic activities are considered a suitable route for fulfilling this demand.Here, we have used hydrothermally synthesized vanadium sulfide (VS 4 ) and molybdenum disulfide (MoS 2 ) composite heterostructures for photocatalytic based renewable energy production. The catalytic activity of VS 4 observed for the water splitting process makes it a potential candidate for the applications. At the same time, it suffers from photogener-ated charge recombination and photocorrosion which limits its catalytic performances. The key motivation of this work was to diminish the charge recombination via appropriate composite formation with MoS 2 as well as to minimize the photocorrosion of resulting materials with the support of reduced graphene oxide (rGO). Eventually, separation of photogenerated charge carriers and anti-photocorrosion property of the VS 4 -MoS 2 -rGO based composite leads to its efficient catalyst for photocatalytic water splitting applications. The resulting composite shows 4.5 times higher catalytic activity and stability than bare constituent materials.

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Section: Synthesis Of Mos 2 and Mos 2 -Rgomentioning

confidence: 99%

Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

et al. 2022

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“…), elemental sulfur and thiocarbamide are non-volatile, non-toxic, and, moreover, available and not expensive. Elemental sulfur is known to be soluble in organic solvents [21], and thiocarbamide is soluble in water [22]. These properties allow the loading of S and TC into the reactionary system as a part of organic (for S) of aqueous (for TC) phase of reverse emulsion.…”

Section: Agents and Synthesis Processmentioning

confidence: 99%

“…These properties allow the loading of S and TC into the reactionary system as a part of organic (for S) of aqueous (for TC) phase of reverse emulsion. Both agents are often used as a source of sulfur for sulfidation of Mo-containing precursors on a laboratory scale [22][23][24][25]. Formation of H 2 S in a hydrogen atmosphere occurs at a moderate temperature of 120-200 • C [26,27] and 180 • C [28], for elemental sulfur and thiocarbamide, respectively.…”

Section: Agents and Synthesis Processmentioning

confidence: 99%

Ex-Situ Synthesis and Study of Nanosized Mo-Containing Catalyst for Petroleum Residue Hydro-Conversion

2019

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This study represents the results of ex-situ synthesis and research of the properties of concentrated suspensions with new catalysts for petroleum residue hydro-conversion. Suspensions were prepared and stabilized in a petroleum residue medium through reverse emulsions containing water-soluble Mo-precursor and S-containing agents (elemental sulfur, thiocarbamide) in the absence of a solid carrier. The resulting ex-situ catalyst dispersions had Mo content of 6-10 wt % and contained nanosized and submicron catalyst particles stabilized in a petroleum residue medium. The effects of S-containing agents on the properties of catalytic particles (sulfidation level, dispersity, structural and morphological features) were studied. The synthesis conditions for the optimal ex-situ catalyst providing the lowest coke yield (0.2 wt %) and the highest conversion (55.5 wt %) during petroleum residue hydro-conversion in a single pass mode have been determined.

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“…Transition-metal sulfides, especially molybdenum disulfide (MoS 2 ), are scientifically and technologically important materials and are widely used in applications in electrochemistry, 1 lubrication, 2,3 and catalysis, 4,5 thanks to their graphene-like structure, intrinsic band gap, and high mobility. Molybdenum disulfide has a hexagonal layer structure which consists of a layer of molybdenum atoms sandwiched between two layers of sulfur atoms, and connected by weak van der Waals forces.…”

Section: Introductionmentioning

confidence: 99%

“…12 Note that the absence of the 002 diffraction in the XRD of the obtained material indicates that no stacking of layers has taken place. 22 The morphology of the sample was primarily investigated by scanning-electron microscopy (SEM). SEM images show that the sample is formed entirely of agglomerated spheres with regular shape and polydispersed in size, having an average diameter near to 1 μm (Figure 2).…”

Section: Introductionmentioning

confidence: 99%

Subcritical hydrothermal synthesis of amorphous molybdenum disulfide spheres

Akram

Achak

Chafik

2020

Journal of Chemical Research

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Amorphous MoS2 spheres with diameters ranging from 150 nm to 1.5 μm are successfully prepared following a reliable one-pot hydrothermal route using a homemade autoclave and inexpensive reactants, at a low temperature (160 °C) and a short reaction time (12 h). The obtained material is comprehensively characterized by X-ray diffraction, scanning-electron microscopy, energy-dispersive X-ray spectroscopy, atomic force microscopy, and infrared spectroscopy. The X-ray diffraction pattern reveals the amorphous structure of the prepared sample without stacking layers, whereas scanning-electron microscopy and atomic force microscopy images indicate the formation of spheres with regular shape and morphology.

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A comparison of MoS 2 catalysts hydrothermally synthesized from different sulfur precursors in their morphology and hydrodeoxygenation activity

Cited by 15 publications

References 28 publications

Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

Ex-Situ Synthesis and Study of Nanosized Mo-Containing Catalyst for Petroleum Residue Hydro-Conversion

Subcritical hydrothermal synthesis of amorphous molybdenum disulfide spheres

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A comparison of MoS 2 catalysts hydrothermally synthesized from different sulfur precursors in their morphology and hydrodeoxygenation activity

Cited by 15 publications

References 28 publications

Synthesis of Photocorrosion‐Resistant VS4‐MoS2‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

Synthesis of Photocorrosion‐Resistant VS4‐MoS2‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

Ex-Situ Synthesis and Study of Nanosized Mo-Containing Catalyst for Petroleum Residue Hydro-Conversion

Subcritical hydrothermal synthesis of amorphous molybdenum disulfide spheres

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Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity

Synthesis of Photocorrosion‐Resistant VS₄‐MoS₂‐rGO Based Nanocomposite with Efficient Photoelectrochemical Water‐Splitting Activity