Hydrothermal synthesis of MoS2 nanosheets for multiple wavelength optical sensing applications

Chaudhary, Nahid; Khanuja, Manika; Abid,; Islam, S. S.

doi:10.1016/j.sna.2018.05.008

Cited by 119 publications

(64 citation statements)

References 56 publications

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“…The broadening of the peaks indicate an amorphous nature of the polymer [19]. The peaks (marked with black rectangles) centred at 2θ (hkl): 14.33° (002), 38.23° (103), 44.40° (009), 58.27° (110), 64.76° (01111), 77.77° (0010) and 81.96° (0114) correspond to the hexagonal structure of MoS 2 [2,20]. Therefore, integration of PANI does not change the structural property of MoS 2 .…”

Section: Resultsmentioning

confidence: 99%

“…In search of highly efficient photocatalytic materials, 2D nanostructures have attracted tremendous interest as a possible replacement of existing photocatalytic materials due to their visible light driven photocatalytic activity. Two dimensional (2D) metal dichalcogenide (MoS 2 ), is known for its remarkable photocatalytic properties arising from its unique physicochemical characteristics such as porous structure, large surface areas and active sites, good crystallinity and better separation of charge carriers, etc [1][2][3]. Despite all its advantages, poor electronic conductivity acts as a major drawback in employing MoS 2 as a photocatalytic material [4].…”

Section: Introductionmentioning

confidence: 99%

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Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

et al. 2019

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In this work, the fabrication of MoS 2 -Polyaniline (PANI) nanocomposites, by in situ polymerization, has been described and its application as a photocatalyst for the degradation of organic pollutants such as methylene blue (MB) and 4-chlorophenol (4-CP), has been reported. The disadvantages of MoS 2 such as poor electronic conductivity and agglomeration between the nanosheets, was overcome by intercalating 2D MoS 2 layers with 1D conducting polymer, Polyaniline (PANI). The composite material was characterised by SEM, TEM, BET, XRD, FTIR, UV-Vis spectroscopy and XPS, indicating proper intercalation between MoS 2 nanosheets and PANI. Consequently, the synthesized composites were used for the degradation of MB and 4-CP, followed by kinetic investigations to determine the rate kinetics. The photoactivity of the nanocomposite is explained by the transfer of photogenerated electrons from PANI to the CB of MoS 2 , thus preventing the direct recombination of electrons and holes. Hence, a positive synergistic effect between MoS 2 and PANI resulted in efficient photocatalytic degradation of organic dyes like MB.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

et al. 2019

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“…Li et al [ 59 ] prepared MoS 2 hollow spheres and obtained that UV/vis ( Figure 3(a) ) of hollow spheres (335 nm) blue shifted as compared to bulk MoS 2 (340 nm). In another study, Chaudhary et al [ 60 ] reported that MoS 2 nanoflakes and UV/vis ( Figure 3(b) ) displayed two absorption peaks at 614 and 663 nm attributed to K -point excitonic transitions at the Brillouin zone. Their corresponding band gaps were 2.01 and 1.87 eV, respectively.…”

Section: Structural Morphological and Thermal Characterization Tmentioning

confidence: 99%

“…Thus, the wavenumber can be related to energy Δ E by the following equation:

where v is the frequency (Hertz), c is the speed of light (2.998 × 10 8 m s −1 ), and h is the Planck's constant (6.626 × 10 −34 J s). FTIR analysis of pristine MoS 2 presented in Figure 7 shows several characteristic peaks attributed to different stretching/vibrations [ 60 ]. The vibration bands at 478 cm −1 and 594 cm −1 are attributed to Mo-S and the bands at 927 cm −1 are due to S-S bonds.…”

Section: Structural Morphological and Thermal Characterization Tmentioning

confidence: 99%

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Instrumental Techniques for Characterization of Molybdenum Disulphide Nanostructures

Ramohlola

Iwuoha

Hato

et al. 2020

Journal of Analytical Methods in Chemistry

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The excellent chemical and physical properties of materials (nanomaterials) with dimensions of less than 100 nm (nanometers) resulted in researchers and industrialists to have great interest in their discovery and applications in various systems/applications. As their sizes are reduced to nanoscale, these nanomaterials tend to possess exceptional properties differing from those of their bulk counterparts; hence, they have found applications in electronics and medicines. In order to apply them in those applications, there is a need to synthesise these nanomaterials and study their structural, optical, and electrochemical properties. Among several nanomaterials, molybdenum disulphide (MoS2) has received a great interest in energy applications due to its exceptional properties such as stability, conductivity, and catalytic activities. Hence, the great challenge lies in finding the state-of-the-art characterization techniques to reveal the different properties of MoS2 nanostructures with great accuracy. In this regard, there is a need to study and employ several techniques to accurately study the surface chemistry and physics of the MoS2 nanostructures. Hence, this review will comprehensively discuss a detailed literature survey on analytical techniques that can be used to study the chemical, physical, and surface properties of MoS2 nanostructures, namely, ultraviolet-visible spectroscopy (UV-vis), photoluminescence spectroscopy (PL), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, time-of-flight secondary ion mass spectroscopy (TOF-SIMS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning and transmission electron microscopies (SEM and TEM), atomic force microscopy (AFM), energy dispersive X-ray spectroscopy (EDS/X), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and electroanalytical methods which include linear sweep (LSV) and cyclic (CV) voltammetry and electrochemical impedance spectroscopy (EIS).

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2D Materials for Wearable Energy Harvesting

Lee

2022

Adv Materials Technologies

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theoretical investigation into the effect of surface tension component ratios between the polar and dispersion components of applied solvents and 2D materials (Figure 3b). [523] The results indicated that a solvent suited for certain 2D materials LPE should have surface tension component ratios similar to the 2D materials. [523] However, direct exfoliation using sonication and Figure 3. Top-down approaches in 2D materials preparation. a) Schematically illustration of ultrasonic-assisted exfoliation. Reproduced with permission. [524] Copyright 2013, American Association for the Advancement of Science. b) Top and middle rows: dispersibility of graphene and MoS 2 as a function of total surface tension and polar to dispersive ratio. Bottom row showing the thickness histogram of graphene and MoS 2 exfoliated using solvents with the optimal surface tension and polar to dispersive component ratio. Reproduced with permission. [523] Copyright 2015, American Chemical Society. c) Detailed schematic of cathodic exfoliation (top) and anodic exfoliation (bottom) of graphene from graphite. Reproduced with permission. [1184] Copyright 2015, Elsevier. d) DFT calculation results of ion-intercalation exfoliation of graphite into graphene using SO 4 2− ion (bottom left), Li ion (top right) and K ion (bottom right). Reproduced under terms of the CC-BY license. [565] Copyright 2017, The Authors, published by the Royal Society of Chemistry. e) Left: SEM image (top) and AFM image (bottom) of a typical graphene obtained by ion-intercalated exfoliation. Right: Lateral size (top) and thickness (bottom) distribution of graphene through ion-intercalation exfoliation. Reproduced with permission.

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Hydrothermal synthesis of MoS2 nanosheets for multiple wavelength optical sensing applications

Cited by 119 publications

References 56 publications

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

Inorganic–organic nanohybrid of MoS2-PANI for advanced photocatalytic application

Instrumental Techniques for Characterization of Molybdenum Disulphide Nanostructures

2D Materials for Wearable Energy Harvesting

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