Properties, preparation, and application of tungsten disulfide: a review

Ding, Jinzi; Feng, Ailing; Li, Xiaodong; Ding, Shijiu; Liu, Liang; Ren, Wei

doi:10.1088/1361-6463/abd9e8

Cited by 32 publications

(20 citation statements)

References 99 publications

(113 reference statements)

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“…The XRD data present no change in the diffraction pattern between the two treatments (Figure ). In both cases, two discrete phases are observed: the detrital Co 9 S 8 (Fm3m, PDF #01-086-2273) and the catalytically active MoS 2 (isostructural with WS 2 P6 3 /mmc, PDF #00-008-0237) . These observations are supported by the TEM data (Figure ).…”

Section: Results and Discussionsupporting

confidence: 68%

Observation of Phase Transformations during Sulfidation: An Ex-Situ Study Involving a Promoted Experimental Catalyst

Kliewer

Wooler

2022

J. Phys. Chem. C

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The stepwise, ex-situ gas phase (0.1 MPa 10% H 2 S/ 90% H 2 ) sulfidation of an unsupported, Co-promoted MoS 2 catalyst from an experimental Co 2 MoO x precursor is examined. Time−temperature transformation studies involving X-ray diffraction and transmission electron microscopy yield insights into the evolution of Co 9 S 8 and MoS 2 structures and the associated phase partitioning phenomena that occur during sulfidation. Discrete CoS x (initially Co 4 S 3 and then Co 9 S 8 ) structures form prior to the MoS 2 particle development. CoS x growth continues as MoS 2 slabs begin to form. However, substantial CoS x particle formation is essentially completed even as MoS 2 growth continues, suggesting that a significant amount of the Co promoter is consumed in the CoS x phase prior to the complete MoS 2 particle development. These data indicate that it is only those Co ions unable to diffuse into the CoS x phase that are ultimately available to create active sites by decorating the S-edges of the MoS 2 particles.

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Section: Results and Discussionsupporting

confidence: 68%

Observation of Phase Transformations during Sulfidation: An Ex-Situ Study Involving a Promoted Experimental Catalyst

Kliewer

Wooler

2022

J. Phys. Chem. C

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“…Despite having significant intrinsic losses, Tu was chosen for optical wavelength applications because of the excellent impedance matching with open space. Because weak transmission and reflection quality leads to increased absorption behavior [ 26 ]. SiO 2 was chosen as a dielectric substrate material because it is lossless in the optical wavelengths.…”

Section: Geometric Structure Of the Absorber Unit Cellmentioning

confidence: 99%

Broadband Plasmonic Metamaterial Optical Absorber for the Visible to Near-Infrared Region

et al. 2023

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An oblique angle and polarization insensitive metamaterial absorber (MA) are highly desired for the visible and infrared optical applications like, wave energy harvesting, optical filters, and detecting thermal leaks and electrical defects. In this paper, a multi-layered MA consisting of two layers of tungsten resonators on a silicon dioxide substrate, coated with additional SiO2 materials is investigated. The unit cell size of the MA is 0.5λ × 0.5λ × 0.8λ, at the lowest wavelength. The proposed MA offers an average absorption of 92% from 400 nm to 2400 nm with stable oblique incident angles up to 45°. The structure also achieves polarization insensitivity at the entire visible and near-infrared spectrum. Moreover, the MA is found highly compatible for solar absorber applications with high y AAM1.5. The structure is also compatible for filter application in optical communication system by modifying the plasmonic nano structure. The modified structure can block the wavelengths of the visible band (450 nm to 800 nm) and transmit optical communication bands (800 to 1675 nm). These versatile absorption and filtering performance make the proposed design highly potential for solar energy harvesting, photodetection, thermal imaging, photo-trapping, and optical communications applications.

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“…The purpose of using W in the patch and ground of this design was due to the high intrinsic loss and impedance matching feature with free space in optical wavelength applications. Therefore, this leads to an increased absorption behavior by offering low reflection and transmission properties [ 29 ]. The SiO 2 was selected as a dielectric substrate due to its lossless property at optical wavelengths and large negative part of permittivity in the whole optical region instated of the large imaginary part.…”

Section: Absorber Designmentioning

confidence: 99%

Wide-Oblique-Incident-Angle Stable Polarization-Insensitive Ultra-Wideband Metamaterial Perfect Absorber for Visible Optical Wavelength Applications

et al. 2022

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Metamaterial absorbers are very attractive due to their significant absorption behavior at optical wavelengths, which can be implemented for energy harvesting, plasmonic sensors, imaging, optical modulators, photovoltaic detectors, etc. This paper presents a numerical study of an ultra-wide-band double square ring (DSR) metamaterial absorber (MMA) for the complete visible optical wavelength region, which is designed with a three-layer (tungsten-silicon dioxide-tungsten) substrate material. Due to the symmetricity, a polarization-insensitive absorption is obtained for both transverse electric (TE) and transverse magnetic (TM) modes by simulation. An absorption above 92.2% and an average absorption of 97% are achieved in the visible optical wavelength region. A peak absorption of 99.99% is achieved at 521.83 nm. A wide range of oblique incident angle stabilities is found for stable absorption properties. A similar absorption is found for different banding angles, which may occur due to external forces during the installation of the absorber. The absorption is calculated by the interference theory (IT) model, and the polarization conversion ratio (PCR) is also validated to verify the perfect MMA. The electric field and magnetic field of the structure analysis are performed to understand the absorption property of the MMA. The presented MMA may be used in various applications such as solar cells, light detection, the biomedical field, sensors, and imaging.

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Properties, preparation, and application of tungsten disulfide: a review

Cited by 32 publications

References 99 publications

Observation of Phase Transformations during Sulfidation: An Ex-Situ Study Involving a Promoted Experimental Catalyst

Observation of Phase Transformations during Sulfidation: An Ex-Situ Study Involving a Promoted Experimental Catalyst

Broadband Plasmonic Metamaterial Optical Absorber for the Visible to Near-Infrared Region

Wide-Oblique-Incident-Angle Stable Polarization-Insensitive Ultra-Wideband Metamaterial Perfect Absorber for Visible Optical Wavelength Applications

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