A new 2-methylimidazole-assisted liquid-exfoliation method for a rapid scalable fabrication of chemically pure MoS2 nanosheets

Sokolov, Maksim R.; Tumbinskiy, Konstantin A.; Zvyagina, Alexandra I.; Senchikhin, I. N.; Averin, A. A.; Aleksandrov, A. E.; Tameev, A. R.; Ezhov, A. A.; Kalinina, Maria A.

doi:10.1016/j.colcom.2022.100604

Cited by 6 publications

(6 citation statements)

References 33 publications

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“…The MoS 2 nanosheets with an average thickness of 1.5 nm obtained by the previously reported 3-methylimidazole-assisted exfoliation of micronized powder of MoS 2 (see the Experimental Section for details) were used for fabricating porphyrin-based hybrid material. To obtain SURMOF/MoS 2 hybrids, a stepwise solvothermal protocol previously described for intercalating ZnTCPP into microparticles of LeuH , was applied (Figure ).…”

Section: Resultsmentioning

confidence: 99%

“…In the SURMOF/MoS 2 hybrid, the Forster energy transfer between inorganic particles and organic chromophore can occur because the luminescence band of the MoS 2 nanosheets at 360 nm 45 overlap the absorption band of ZnTCPP at 440 nm. 39 The porphyrin molecules can be therefore excited either directly by visible-light irradiation or indirectly by a UVmediated energy transfer that offers an opportunity of switching the functioning of the hybrid in a controlled manner.…”

Section: Resultsmentioning

confidence: 99%

“…Nanosheets. Single-layer MoS 2 nanosheets were obtained by using the procedure previously reported in ref 45. A portion of 150 mL of a solution containing 11.7 g of 2methylimidazole was added to an excess of 0.500 g of molybdenum sulfide.…”

Section: Synthesis Of Mosmentioning

confidence: 99%

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Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Sokolov,

Tumbinskiy,

Varlamova

et al. 2023

ACS Appl. Mater. Interfaces

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A noncovalent integration of nanosheets of molybdenum disulfide (MoS2) and the zinc porphyrin complex Zn(II) 5,10,15,20-tetrakis(4-carboxyphenyl)porphine (ZnTCPP) through coordination bonding with metal clusters of zinc acetate (Zn[OAc]2) was applied for synthesis of stable hybrid nanomaterial avoiding surface prefunctionalization. The X-ray powder diffraction in combination with the BET nitrogen adsorption method confirms formation of a ZnTCPP-based surface-attached metal–organic framework (SURMOF) with micropores of 1.63 nm on the MoS2 nanosheets. Fluorescence spectroscopy confirmed Forster resonance energy transfer (FRET) between MoS2 and ZnTCPP without contact quenching. Fluorescent trapping with terephthalic acid for hydroxyl radicals and Sensor Green for singlet oxygen was applied for studying the pathways of photodegradation of model organic pollutant 1,5-dihydroxynaphthalene (DHN) in the presence of SURMOF/MoS2. Visible light initiates sensitization through the excitation of ZnTCPP generating singlet oxygen, whereas UV-light promotes either aerobic FRET-mediated “Z scheme” or anaerobic “Type II heterojunction” mechanisms. Owing to its multimodal photochemistry, the SURMOF/MoS2 hybrid showed comparatively high photocatalytic activity in UV-assisted degradation of DHN (k eff UV = 4.0 × 10–2 min–1) as well as the antibacterial activity confirmed by E. coli survival test under visible light. Noncovalent self-assembly utilizing coordination bonding in SURMOFs as supramolecular adhesive to avoid surface premodification provides a basis for new types of multicomponent nanosystems with switchable functionalities by combining different 2D materials and chromophores in one hybrid structure.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Sokolov,

Tumbinskiy,

Varlamova

et al. 2023

ACS Appl. Mater. Interfaces

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“…(Figure 2D). [ 26 ] Because of the pristine MoS 2 crystal structure disintegrates into several layers of nanosheets, the intensity of both bands sharply decreased after exfoliation. [ 27 ] The position of these peaks remains almost unchanged, but their width decreases slightly.…”

Section: Resultsmentioning

confidence: 99%

Molybdenum disulfide of modified in situ as a nanofiller for enhanced mechanical properties and thermal properties of polypropylene composites

Dong

Liu²,

Li³

et al. 2022

Polymer Composites

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Few-layer molybdenum disulfide (MoS 2 ) was prepared by liquid phase exfoliation with in-situ modification as a nanofiller for polypropylene (PP). Scanning and transmission electron microscopies (SEM, TEM) showed uniform dispersion and excellent adhesion of MoS 2 within the PP matrix. When MoS 2 was centrifuged at 1000 rpm, the mechanical properties of the composite were greatly improved by adding only 0.5 wt.% of MoS 2 . The yield strength, bending modulus, and impact strength increased by 2.3%, 8.9%, and 44.03%, respectively. X-ray diffraction (XRD) and differential scanning calorimetry (DSC) showed that the enhanced mechanical properties of the composites were related to PP crystallographic transformation. Thermogravimetric analysis (TGA) showed that the incorporation of 2 wt.% MoS 2 increased the maximum weight-loss temperature of the composites by approximately 30 C. The mechanisms for increasing thermal stability have been thoroughly demonstrated by band energy analysis. MoS 2 nanosheets have high aspect ratios and strong insulation with a change in band gap width compared to bulk MoS 2 , which is resulting in the stronger interactions at the MoS 2 /PP substrate interface. Furthermore, due to the outstanding carrier for rigid and thermally stable materials, MoS 2 composites displayed excellent mechanical and thermal properties. In addition, unlike PP, the melt flow rate (MFR) of composite materials is more conducive to downstream product processing. This will further promote the application scope of MoS 2 /PP composites.

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“…In this case, intensive tensile stress is fashioned on the layered block, which causes the block to peel off 58 . The key challenge involving this exfoliation method is to match the surface energy between the layered block and the solvent system, and two main types of solvents are used: organic solvents and water with added surfactants 59–63 . The exfoliation could be achieved more effectively as the solvent has surface energy similar to that of the block.…”

Section: Synthesis Of Ultra‐small Mos2mentioning

confidence: 99%

A review on ultra‐small undoped MoS₂ as advanced catalysts for renewable fuel production

Liu,

Ding,

Meng

et al. 2024

Carbon Energy

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Molybdenum disulfide (MoS2) has garnered significant attention in the field of catalysis due to the high density of active sites in its unique two‐dimensional (2D) structure, which could be developed into numerous high‐performance catalysts. The synthesis of ultra‐small MoS2 particles (<10 nm) is highly desired in various experimental studies. The ultra‐small structure could often lead to a distinct S–Mo coordination state and nonstoichiometric composition in MoSx, minimizing in‐plane active sites of the 2D structure and making it probable to regulate the atomic and electronic structure of its intrinsic active sites on a large extent, especially in MoSx clusters. This article summarizes the recent progress of catalysis over ultra‐small undoped MoS2 particles for renewable fuel production. Through a systematic review of their synthesis, structural, and spectral characteristics, as well as the relationship between their catalytic performance and inherent defects, we aim to provide insights into catalysis over this matrix that may potentially enable advancement in the development of high‐performance MoS2‐based catalysts for sustainable energy generation in the future.

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A new 2-methylimidazole-assisted liquid-exfoliation method for a rapid scalable fabrication of chemically pure MoS2 nanosheets

Cited by 6 publications

References 33 publications

Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Molybdenum disulfide of modified in situ as a nanofiller for enhanced mechanical properties and thermal properties of polypropylene composites

A review on ultra‐small undoped MoS₂ as advanced catalysts for renewable fuel production

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A new 2-methylimidazole-assisted liquid-exfoliation method for a rapid scalable fabrication of chemically pure MoS2 nanosheets

Cited by 6 publications

References 33 publications

Noncovalent Self-Assembly of Single-Layer MoS2 Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Noncovalent Self-Assembly of Single-Layer MoS2 Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Molybdenum disulfide of modified in situ as a nanofiller for enhanced mechanical properties and thermal properties of polypropylene composites

A review on ultra‐small undoped MoS2 as advanced catalysts for renewable fuel production

Contact Info

Product

Resources

About

Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

Noncovalent Self-Assembly of Single-Layer MoS₂ Nanosheets and Zinc Porphyrin into Stable SURMOF Nanohybrids with Multimodal Photocatalytic Properties

A review on ultra‐small undoped MoS₂ as advanced catalysts for renewable fuel production