Liquid Phase Exfoliation of MoS2 Nano-sheets and Observation of Resistive Switching Memory in MoS2 Nano-sheets-PVDF-HFP Composite Films

Deb, Rajesh; Nair, Manjula G.; Halder, Sudipta; Sharma, Annu; Mohapatra, Swagat K.

doi:10.1016/j.matpr.2019.07.574

Cited by 14 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are two characteristic peaks at around 405 and 308 cm −1 , which correspond to the A 1g and E 1 2g vibration modes of 2H‐MoS 2 . [ 30 ] The red shift and broadening in FL‐MoS 2− x @HC are due to the changes in the concentration of S‐vacancies and the number of layers. [ 31 ] The changed character of E 1 2g peak is attributed to the decrease in the proportion of S elements, including the decrease of MoS chemical bonds and the increase of S‐vacancies.…”

Section: Resultsmentioning

confidence: 99%

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Luo

Ruan

Wang

et al. 2021

Small

View full text Add to dashboard Cite

The room‐temperature sodium–sulfur (RT‐Na/S) battery is one of the most promising technologies for low‐cost energy storage. However, application of RT‐Na/S batteries is currently impeded by severe shuttle effects and volume expansion that limits both energy density and cycling stability. Herein, first, the first‐principal calculation is used to find that the introduction of sulfur vacancies in MoS2 can effectively enhance polysulfide adsorption and catalytic ability as well as both the ion and electron conductivities. Then, unique MoS2−x/C composite spheres are further designed and synthesized with flower‐like few‐layer and interlayer‐enlarged MoS2−x nanosheets space‐confined in hollow carbon nanospheres by a “ship‐in‐a‐bottle” strategy. With this novel design, the mass loading of S in the MoS2−x/C composite can be reached to as high as 75 wt%. Owing to the synergetic effect of interlayer‐expanded and few‐layer MoS2−x nanosheets and hollow carbon spheres matrix with high electronic/Na+ conductivity, the RT‐Na/S batteries deliver highly stable cycle durability (capacity retention of 85.2% after 100 cycles at 0.1 A g−1) and remarkable rate capability (415.7 mAh g−1 at 2 A g−1) along with high energy density. This design strategy of defect‐ and interlayer‐engineering may find wide applications in synthesizing electrode materials for high‐performance RT‐Na/S batteries.

show abstract

Section: Resultsmentioning

confidence: 99%

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Luo

Ruan

Wang

et al. 2021

Small

View full text Add to dashboard Cite

show abstract

“…MoS 2 nanosheets can be synthesized through top-down methods, which consist of exfoliating the bulk MoS 2, and the bottom-up approach, consisting of growing nanosheets from single atoms using chemical methods such as chemical vapor deposition (CVD) or the hydrothermal method. Exfoliation processes are highly efficient and conveniently scalable, producing by-products that are less hazardous and lower costs than bottom-up methods [ 76 , 77 ]. However, bottom-up methods provide better control of phase composition and morphology.…”

Section: Common Synthesis Methods and Modifications Of Mosmentioning

confidence: 99%

“…The addition of a polymer may stabilize the MoS 2 nanosheets, thereby maintaining the properties of exfoliated nanosheets. For instance, Deepak et al [ 77 ] added the polymer poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and used dimethylformamide (DMF) as a solvent in the liquid-phase exfoliation method. Due to its surface energy, water is not considered a suitable solvent for this method.…”

Section: Common Synthesis Methods and Modifications Of Mosmentioning

confidence: 99%

MoS2 and MoS2 Nanocomposites for Adsorption and Photodegradation of Water Pollutants: A Review

Amaral

Daniel‐da‐Silva

2022

Molecules

View full text Add to dashboard Cite

The need for fresh and conveniently treated water has become a major concern in recent years. Molybdenum disulfide (MoS2) nanomaterials are attracting attention in various fields, such as energy, hydrogen production, and water decontamination. This review provides an overview of the recent developments in MoS2-based nanomaterials for water treatment via adsorption and photodegradation. Primary attention is given to the structure, properties, and major methods for the synthesis and modification of MoS2, aiming for efficient water-contaminant removal. The combination of MoS2 with other components results in nanocomposites that can be separated easily or that present enhanced adsorptive and photocatalytic properties. The performance of these materials in the adsorption of heavy metal ions and organic contaminants, such as dyes and drugs, is reviewed. The review also summarizes current progress in the photocatalytic degradation of various water pollutants, using MoS2-based nanomaterials under UV-VIS light irradiation. MoS2-based materials showed good activity after several reuse cycles and in real water scenarios. Regarding the ecotoxicity of the MoS2, the number of studies is still limited, and more work is needed to effectively evaluate the risks of using this nanomaterial in water treatment.

show abstract

“…MoS 2 nanoflakes in polymer hosts like PVA, PMMA, PVP and PVDF-HFP mostly show bipolar resistive switching (BRS) and WORM type memory operations. [9][10][11][12] The switching mechanism could be redox or charge-trapping type. However, unlike the case of bare MoS 2 , there are no reports of observing both unipolar and BRS in the polymeric nanocomposites of MoS 2 nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Polarity independent resistive switching in MoS₂ nanosheets and PEO-based nanocomposite films

DEB

Pathak

Mohapatra

et al. 2022

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Here, we report the exfoliation of bulk MoS2 (molybdenum disulfide) into few-layer nanosheets and then prepared nanocomposite films with poly(ethylene oxide) (MoS2-PEO). We observed nonpolar or polarity independent bistable resistive switching memory in two-terminal devices with indium tin oxide (ITO) and aluminum (Al) as bottom and top electrodes, respectively. In both bipolar and unipolar operation, it is observed that the biasing direction controls the current conduction mechanism. When positive bias is applied at the top Al electrode, the low resistance state (LRS) conduction is ohmic type. But in opposite biasing condition, LRS conduction is space charge controlled. The current-voltage characteristics of the bipolar and unipolar switching are distinctly different in terms of their RESET process. In bipolar, the RESET process is very sharp whereas in unipolar operation it is staggered and step-wise.

show abstract

Liquid Phase Exfoliation of MoS2 Nano-sheets and Observation of Resistive Switching Memory in MoS2 Nano-sheets-PVDF-HFP Composite Films

Cited by 14 publications

References 16 publications

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

MoS2 and MoS2 Nanocomposites for Adsorption and Photodegradation of Water Pollutants: A Review

Polarity independent resistive switching in MoS₂ nanosheets and PEO-based nanocomposite films

Contact Info

Product

Resources

About

Liquid Phase Exfoliation of MoS2 Nano-sheets and Observation of Resistive Switching Memory in MoS2 Nano-sheets-PVDF-HFP Composite Films

Cited by 14 publications

References 16 publications

Flower‐Like Interlayer‐Expanded MoS2−x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Flower‐Like Interlayer‐Expanded MoS2−x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

MoS2 and MoS2 Nanocomposites for Adsorption and Photodegradation of Water Pollutants: A Review

Polarity independent resistive switching in MoS2 nanosheets and PEO-based nanocomposite films

Contact Info

Product

Resources

About

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Flower‐Like Interlayer‐Expanded MoS₂₋_x Nanosheets Confined in Hollow Carbon Spheres with High‐Efficiency Electrocatalysis Sites for Advanced Sodium–Sulfur Battery

Polarity independent resistive switching in MoS₂ nanosheets and PEO-based nanocomposite films