Investigation of electronic properties and chemical interactions of graphene-MoSx composites

Sygellou, Labrini; Tzanidis, Iordanis; Tasis, Dimitrios

doi:10.1016/j.apsusc.2020.146188

Cited by 9 publications

(5 citation statements)

References 55 publications

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“…Moieties, such as unsaturated sulphur atoms in MoS x lattice, have been assigned at similar binding energies (163.5 eV), as the one of CÀ S bonding type. [41] The third component at ~168 eV was assigned to sulfur-oxide species at the surface.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids

Kostelenos

Bairamis

Karamoschos

et al. 2021

Chemistry A European J

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Among the various organic pollutants and industrial chemicals, 4-nitrophenol has been one of the most monitored substances in aqueous environments, due to its enhanced solubility in such systems. This research reports for the first time the microwave-assisted synthesis of CdS/carbon/MoS x hybrids and the subsequent utilization of such systems as photocatalysts for 4-nitrophenol degradation. The hybrids demonstrated a variable photocatalytic activity, by using a variety of organic substances as precursors for the solvothermal carbonization step. By using ascorbic acid as precursor, the corresponding ternary composite exhibited excellent photocatalytic activity, with the 4-nitrophenol concentration been almost quantitatively decayed within 45 min of irradiation. This could be ascribed due to the generation of a high population of heterojunctions as well as the chemical speciation of Mo-based nanostructures. Such ternary hybrids may be utilized as potential photocatalytic systems in processes, where removal of toxic water-soluble substances is the key issue.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids

Kostelenos

Bairamis

Karamoschos

et al. 2021

Chemistry A European J

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“…While graphene exhibits a gapless band structure [7], in particular, 2H-MoS 2 can tune its band structure by simply adjusting the number of packed layers along the basal direction [103]. Like other TMDC materials, MoS 2 features inert basal planes and active sulfur edge-sites, and increasing the density of these ligands can enhance both their chemical and electronic properties [104][105][106][107]. The intrinsic properties of layered MoS 2 are dependent on its layer number and it could be related to the reduction in vdW interactions, which is one of the main reasons why this dichalcogenide-layered material is of great interest [108].…”

Section: Main Types Of Layered Tmdcs and Their Characteristicsmentioning

confidence: 99%

“…Another possibility is the use of graphene on the top, in a semiconducting 2D materials class [107]. The issue, in this case, is the control and preservation of a high-quality interface during the graphene transfer [300].…”

Section: -Based Heterostructuresmentioning

confidence: 99%

Recent Advances in Layered MX2-Based Materials (M = Mo, W and X = S, Se, Te) for Emerging Optoelectronic and Photo(electro)catalytic Applications

Pinto,

de Conti,

Pereira

et al. 2024

Catalysts

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Transition metal dichalcogenides (TMDCs), represented by MX2 (where M = Mo, W and X = S, Se, and Te), and more recently, their moiré superlattices (i.e., formed by superimposing layers of TMDCs with different rotation angles) have attracted considerable interest due to their excellent physical properties and unique nanoscale functionalities. Compared to graphene, the literature indicates that TMDCs offer a competitive advantage in optoelectronic technologies, primarily owing to their compositionally controlled non-zero bandgap. These two-dimensional (2D) nanostructured single or multiple layers exhibit remarkable properties that differ from their bulk counterparts. Moreover, stacking different TMDC monolayers also forms heterostructures and introduces unique quantum effects and extraordinary electronic properties, which is particularly promising for next-generation optoelectronic devices and photo(electro)catalytic applications. Therefore, in this review, we also highlight the new possibilities in the formation of 2D/2D heterostructures of MX2-based materials with moiré patterns and discuss the main critical challenges related to the synthesis and large-scale applications of layered MX2 and MX2-based composites to spur significant advances in emerging optoelectronic and photo(electro)catalytic applications.

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“…In addition to functionalization of TMDs by physisorption or chemisorption of atoms atop TMD surfaces (discussed in section 4), foreign atoms can dope the TMD structure by replacing metal or chalcogen atoms. 208,427,428 In addition to conventional solution-based processes, 429−431 plasma treatment is a promising technique to modify the electronic structure of 2D TMDs through either in situ or ex-situ doping, as schematically shown in Figures 14a and b. In-situ doping approaches rely on introducing the adatoms to the structure during the fabrication process without the need for any extra steps.…”

Section: Dopingmentioning

confidence: 99%

“…In addition to functionalization of TMDs by physisorption or chemisorption of atoms atop TMD surfaces (discussed in section ), foreign atoms can dope the TMD structure by replacing metal or chalcogen atoms. ,, In addition to conventional solution-based processes, − plasma treatment is a promising technique to modify the electronic structure of 2D TMDs through either in situ or ex-situ doping, as schematically shown in Figures a and b. In-situ doping approaches rely on introducing the adatoms to the structure during the fabrication process without the need for any extra steps. Although adatoms may become well-distributed through the structure, the doping processes and mechanisms are not controllable and well-understood. , In contrast, ex-situ processes rely on separate steps to modify the surface and to insert the adatoms into the structure .…”

Section: Dopingmentioning

confidence: 99%

Plasma Processing and Treatment of 2D Transition Metal Dichalcogenides: Tuning Properties and Defect Engineering

Sovizi,

Angizi,

Ahmad Alem

et al. 2023

Chem. Rev.

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Two-dimensional transition metal dichalcogenides (TMDs) offer fascinating opportunities for fundamental nanoscale science and various technological applications. They are a promising platform for next generation optoelectronics and energy harvesting devices due to their exceptional characteristics at the nanoscale, such as tunable bandgap and strong light-matter interactions. The performance of TMD-based devices is mainly governed by the structure, composition, size, defects, and the state of their interfaces. Many properties of TMDs are influenced by the method of synthesis so numerous studies have focused on processing high-quality TMDs with controlled physicochemical properties. Plasma-based methods are cost-effective, well controllable, and scalable techniques that have recently attracted researchers' interest in the synthesis and modification of 2D TMDs. TMDs' reactivity toward plasma offers numerous opportunities to modify the surface of TMDs, including functionalization, defect engineering, doping, oxidation, phase engineering, etching, healing, morphological changes, and altering the surface energy. Here we comprehensively review all roles of plasma in the realm of TMDs. The fundamental science behind plasma processing and modification of TMDs and their applications in different fields are presented and discussed. Future perspectives and challenges are highlighted to demonstrate the prominence of TMDs and the importance of surface engineering in next-generation optoelectronic applications.

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Investigation of electronic properties and chemical interactions of graphene-MoSx composites

Cited by 9 publications

References 55 publications

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids

Recent Advances in Layered MX2-Based Materials (M = Mo, W and X = S, Se, Te) for Emerging Optoelectronic and Photo(electro)catalytic Applications

Plasma Processing and Treatment of 2D Transition Metal Dichalcogenides: Tuning Properties and Defect Engineering

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Investigation of electronic properties and chemical interactions of graphene-MoSx composites

Cited by 9 publications

References 55 publications

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoSx Hybrids

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoSx Hybrids

Recent Advances in Layered MX2-Based Materials (M = Mo, W and X = S, Se, Te) for Emerging Optoelectronic and Photo(electro)catalytic Applications

Plasma Processing and Treatment of 2D Transition Metal Dichalcogenides: Tuning Properties and Defect Engineering

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Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids

Highly Efficient Simulated Solar Light‐Driven Photocatalytic Degradation of 4‐Nitrophenol over CdS/Carbon/MoS_x Hybrids