Effect of Structural Water on the Dielectric Properties of Hydrated Tungsten Trioxide

Manuja, M.; Sarath, K; Thomas, T. W.; Jose, Joshy; Jose, Gijo

doi:10.1007/s11664-020-07948-8

Cited by 7 publications

(3 citation statements)

References 64 publications

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“…The least square approach is adopted for refining the recorded data to match with theoretical profiles. Psedovoigit function in a linear combination of Gaussian and Lorentzianfunctions 14,15 is used for the better refinement following the relation,…”

Section: Resultsmentioning

confidence: 99%

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

Manuja,

Thomas,

Jose

2024

J. ISAS

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All polymorphs of 2D MoS2 (1T, 2H & 3R) are layered with planes of molybdenum atoms sandwiched between two sulphur atoms (S-Mo-S layers) with intra planar covalent bonding and weak interlayer van der Waal’s interactions. Here in this work, the role of polyethylene glycol as surfactant in the formation of 3R-MoS2 is recognized. XRD and FTIR results provide structural elucidation and bonding information in the compound. More detailed crystal structure investigations and polyhedral visualizations were obtained in the Rietveld refinement procedure. The trigonal prismatic metal coordination in the 3R phase is portrayed with the ABC-ABC type layer stacking sequence. The morphology of layered 3R-MoS2 nanostructure was identified from HRTEM images and the percentage composition from FESEM mapping and EDAX analyses. Temperature dependent mass loss in the compound is monitored and the quantitative analysis confirms the complete transformation of 3R-MoS2 -MoO3 at a temperature of 398 °C. Endo and exothermic peaks in the DSC and DTA measurements help to substantiate the results. Thus the work highlights the temperature assisted conversion of sulphide (3R-MoS2 -MoO3) of molybdenum at 398°C by cleavage of S-S bonds and preserving the layered nature.

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Section: Resultsmentioning

confidence: 99%

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

Manuja,

Thomas,

Jose

2024

J. ISAS

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“…The Nyquist diagram can deduce the relationship between the real and imaginary parts of the product impedance, and the crystal grain and grain boundary will determine the two semicirculars of the high frequency and low-frequency bands, respectively. 51 The CuWO 4 / WO 3 -10 microsphere arc radius of the Nyquist diagram is smaller than that of pure WO 3 , which indicates that the CuWO 4 /WO 3 -10 microsphere interface resistance is lower than that of pure WO 3 , suggesting that the surface charge transfer rate of CuWO 4 /WO 3 -10 microsphere becomes faster and the recombination efficiency of the photogenerated carriers of the CuWO 4 /WO 3 -10 decreases. 41 As shown in Fig.…”

Section: Electrochemical Performancementioning

confidence: 97%

S-scheme heterojunction based on CuWO₄/WO₃ microspheres with an improved photocatalytic property under visible light irradiation

Sun,

Ge,

et al. 2024

CrystEngComm

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“…The orthorhombic phase of WO30.33H2O is prepared hydrothermally in light of our previous reports from sodium tungstate precursors [16]. All reagents were of analytical grade and used without further purification.…”

Section: Sample Preparationmentioning

confidence: 99%

Temperature stimulated bandgap tailoring in the smart chromogenic WO₃0.33H₂O

Manuja¹,

Thomas²,

Jose³

2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The orthorhombic form of WO30.33H2O is prepared hydrothermally and the thermochromic property of the material is identified using spectroradiometer with in a wavelength range of 325 nm to 1075 nm. The variation of reflectance with temperature is observed and it is accompanied with a change in bandgap. The absorbance relation with temperature is analyzed and the presence of Inter Valence Charge Transfer (IVCT) band is detected in the absorbance spectra. The IVCT bands illustrate the homovalent charge transfer mechanism behind the thermochromism taking place in the compound. The change in bandgap with temperature provides further supportive evidence to the thermochromic phenomenon observed in the compound.

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Effect of Structural Water on the Dielectric Properties of Hydrated Tungsten Trioxide

Cited by 7 publications

References 64 publications

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

S-scheme heterojunction based on CuWO₄/WO₃ microspheres with an improved photocatalytic property under visible light irradiation

Temperature stimulated bandgap tailoring in the smart chromogenic WO₃0.33H₂O

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Effect of Structural Water on the Dielectric Properties of Hydrated Tungsten Trioxide

Cited by 7 publications

References 64 publications

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

Temperature Assisted Ligand Conversion from 3R-MoS2 to α-MoO3 by Preserving Layered Nature

S-scheme heterojunction based on CuWO4/WO3 microspheres with an improved photocatalytic property under visible light irradiation

Temperature stimulated bandgap tailoring in the smart chromogenic WO30.33H2O

Contact Info

Product

Resources

About

S-scheme heterojunction based on CuWO₄/WO₃ microspheres with an improved photocatalytic property under visible light irradiation

Temperature stimulated bandgap tailoring in the smart chromogenic WO₃0.33H₂O