Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium

Bindhu, B.; Sharu, B. K.; Gopika, M. S.; Praseetha, P.K.; Veluraja, K.

doi:10.1039/c5ra25368c

Cited by 21 publications

(14 citation statements)

References 57 publications

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“…The (002) peak ascribing to a d-spacing of 0.62 nm illustrates the stacking of single layers, whereas peaks at higher angle are attributes of the crystallinity of the samples [37]. After laser irradiation, the intensity reduction of (002) peak proposed more discount in the thickness of MoS 2 nanosheets [38,39]. It is considered that the (002) diffraction peak of the MoS 2 powder, after laser irradiation, involves a shift to the lower angles and as a result, an increase in d-spacing indicating the destacking of MoS 2 layers.…”

Section: Resultsmentioning

confidence: 99%

Preparation of Few-Layered Wide Bandgap MoS2 with Nanometer Lateral Dimensions by Applying Laser Irradiation

2020

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In this study, we report a new method for the quick, green, and one-step preparation of few-layered molybdenum disulfide (MoS2) nanosheets with wide bandgap. MoS2 nanosheets with small lateral dimension and uniform size distribution were synthesized for various applications. MoS2 powder was synthesized using the hydrothermal method; then, thinned by applying laser irradiation with different energies from 40 to 80 mJ. Transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV-Vis absorption spectra, and photoluminescence (PL) spectra were applied for the characterization of the MoS2 nanosheets in terms of morphology, crystal structures, and optical properties. The widest calculated bandgap 4.7 eV was for the sample under 80 mJ laser energy. The results confirmed the successful preparation of highly pure, uniform, and few-layered MoS2 nanosheets. Furthermore, it was possible to enhance the production rate of MoS2 nanosheets (including nanosheets and nanoparticles) through laser irradiation. Thus, the present paper introduces a simple and green alternative approach for preparing few-layered MoS2 nanosheets of transition metal dichalcogenides or other layered materials.

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Section: Resultsmentioning

confidence: 99%

Preparation of Few-Layered Wide Bandgap MoS2 with Nanometer Lateral Dimensions by Applying Laser Irradiation

2020

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“…MoS 2 consists of strong covalent bonds within the layers and weak van-der-waals interaction between the layers. It is composed of S-Mo-S sandwich layers, where the middle molybdenum atom is coordinated by six S-atoms by strong bonds in a single 2D layer of MoS 2 [3].…”

Section: Introductionmentioning

confidence: 99%

“…Also the compatibility of the filler with the matrix is also to be considered to a large extent . Because these factors paves way for better interfacial interaction between the filler and the polymer matrix , thereby promoting significant property enhancement in the composite [3]. The compatibility of the filler and the matrix can be effectively improved through suitable modification of the filler using chemical surfactants.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Characterization of Few Layered MoS2 Nano Flakes

2019

ijrte

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Two dimensional layered materials have become a prominent area of current research and development due to the significant properties exhibited by them. Exploiting graphene's layered structure have led to the property enhancement and thereby making it a good candidate for potential applications. MoS2 (Molybdenum disulphide), a transition metal dichalcogenide possess exceptional electrical, thermal and mechanical properties which can be well exploited on exfoliation. The present work report the exfoliation of pristine MoS2. The layers of pristine MoS2 are held together by weak van der Waals interaction, which is disturbed by the addition of a suitable modifier facilitating the exfoliation process. The modifier treated MoS2 is elucidated by powder X-ray diffraction, Photoluminesence and Raman spectroscopy

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“…The reduction of (002) intensity can suggest the reduction in thickness of bulk MoS 2 (decrease in the number of layers in each tactoid). Additionally, the widened diffraction peaks show the transformation of bulk MoS 2 to nanosized sheets [52,53]. To investigate the effect of hydrothermal on structural properties of bulk MoS 2 , the XRD patterns of MoS 2 /DDS/acetone before and after hydrothermal process were obtained (Figure 7a).…”

Section: Resultsmentioning

confidence: 99%

A Hydrothermal-Assisted Ball Milling Approach for Scalable Production of High-Quality Functionalized MoS2 Nanosheets for Polymer Nanocomposites

Ahmadi

Zabihi

et al. 2019

Nanomaterials

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The most known analogue of graphene, molybdenum disulfide (MoS2) nanosheet, has recently captured great interest because it can present properties beyond graphene in several high technological applications. Nonetheless, the lack of a feasible, sustainable, and scalable approach, in which synthesizing and functionalization of 2H-MoS2 nanosheets occur simultaneously, is still a challenge. Herein, a hydrothermal treatment has been utilised to reduce the effect of breaking mechanisms on the lateral size of produced nanosheets during the ball milling process. It was demonstrated that the hydrothermal pre-treatment led to the initial intercalation of an organic molecule such as 4,4′-diaminodiphenyl sulfone (DDS) within the stacked MoS2 sheets. Such a phenomenon can promote the horizontal shear forces and cause sliding and peeling mechanisms to be the dominated ones during low energy ball milling. Such combined methods can result in the production of 2H functionalized MoS2 nanosheets. The resultant few layers showed an average lateral dimension of more than 640 nm with the thickness as low as ~6 nm and a surface area as high as ~121.8 m2/g. These features of the synthesised MoS2 nanosheets, alongside their functional groups, can result in fully harnessing the reinforcing potential of MoS2 nanosheets for improvement of mechanical properties in different types of polymeric matrices.

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Molybdenum disulfide nanoflakes through Li-AHA assisted exfoliation in an aqueous medium

Abstract: A novel route to synthesize MoS2 nanoflakes though Li-AHA assisted liquid phase exfoliation.

Cited by 21 publications

References 57 publications

Preparation of Few-Layered Wide Bandgap MoS2 with Nanometer Lateral Dimensions by Applying Laser Irradiation

Preparation of Few-Layered Wide Bandgap MoS2 with Nanometer Lateral Dimensions by Applying Laser Irradiation

Preparation and Characterization of Few Layered MoS2 Nano Flakes

A Hydrothermal-Assisted Ball Milling Approach for Scalable Production of High-Quality Functionalized MoS2 Nanosheets for Polymer Nanocomposites

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