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Structural investigation and sonophotocatalytic properties of the solid solutions Sr(Mo1−xWx)O4 crystals synthesized by the sonochemical method.

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Title: Structural investigation and sonophotocatalytic properties of the solid solutions Sr(Mo1−xWx)O4 crystals synthesized by the sonochemical method.
Authors: de Sousa, P. B.1 (AUTHOR), Nogueira, I. C.2 (AUTHOR), Gusmão, G. O.M.3 (AUTHOR), Gusmão, S. B.S.1 (AUTHOR), Lopes, F. H.P.3 (AUTHOR), Sousa, B. S.3 (AUTHOR), Sczancoski, J. C.4 (AUTHOR), Gouveia, A. F.5 (AUTHOR), Cavalcante, L. S.1,3 (AUTHOR) laeciosc@gmail.com
Source: Journal of Materials Science: Materials in Electronics. Oct2022, Vol. 33 Issue 28, p22127-22152. 26p.
Subjects: Solid solutions, Metal carbonyls, Crystals, Conduction bands, Valence bands, Tungstates, Reflectance spectroscopy
Abstract: In this paper, the solid solutions of strontium molybdate-tungstate [Sr(Mo1−xWx)O4] crystals with (x = 0, 0.25, 0.50, 0.75, and 1) were synthesized by the sonochemical method. Their structure, morphology, optical, and sonophotocatalytic properties were performed in function of the replacement of Mo6+ by W6+ cations into the lattice. Their structure and elemental composition were characterized using X-ray diffraction, Rietveld refinement, micro-Raman, energy-dispersive X-ray, and Fourier-transform infrared spectroscopies proving that all samples are monophasic, crystalline, and exhibit a scheelite-type tetragonal structure. Field-emission scanning electron microscopy images revealed the octahedral and dumbbell-like morphologies for SrMoO4 and SrWO4 crystals. Moreover, it is noted to pass through spindle-like morphology for the microcrystals containing both Mo6+ and W6+ cations (x = 0.25, 0.50, and 0.75). Ultraviolet-visible diffuse reflectance spectroscopy showed a directly proportional increase in the optical band gap (Egap) values from 4.27 to 5.01 eV. These data indicate an increase in the intermediary electronic levels between valance and conduction bands with the increase in the concentration of W6+ cations in the lattice. Finally, we have obtained good sonophotocatalytic performances for SrMoO4 crystals (90%), and mainly to Sr(Mo0.25W0.75)O4 crystals (98%) in the degradation of Rhodamine B dye until 240 min under UV-C light. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Materials Science: Materials in Electronics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Structural investigation and sonophotocatalytic properties of the solid solutions Sr(Mo<subscript>1−x</subscript>W<subscript>x</subscript>)O<subscript>4</subscript> crystals synthesized by the sonochemical method.
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Materials+Science%3A+Materials+in+Electronics%22">Journal of Materials Science: Materials in Electronics</searchLink>. Oct2022, Vol. 33 Issue 28, p22127-22152. 26p.
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  Data: <searchLink fieldCode="DE" term="%22Solid+solutions%22">Solid solutions</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+carbonyls%22">Metal carbonyls</searchLink><br /><searchLink fieldCode="DE" term="%22Crystals%22">Crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Conduction+bands%22">Conduction bands</searchLink><br /><searchLink fieldCode="DE" term="%22Valence+bands%22">Valence bands</searchLink><br /><searchLink fieldCode="DE" term="%22Tungstates%22">Tungstates</searchLink><br /><searchLink fieldCode="DE" term="%22Reflectance+spectroscopy%22">Reflectance spectroscopy</searchLink>
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  Data: In this paper, the solid solutions of strontium molybdate-tungstate [Sr(Mo1−xWx)O4] crystals with (x = 0, 0.25, 0.50, 0.75, and 1) were synthesized by the sonochemical method. Their structure, morphology, optical, and sonophotocatalytic properties were performed in function of the replacement of Mo6+ by W6+ cations into the lattice. Their structure and elemental composition were characterized using X-ray diffraction, Rietveld refinement, micro-Raman, energy-dispersive X-ray, and Fourier-transform infrared spectroscopies proving that all samples are monophasic, crystalline, and exhibit a scheelite-type tetragonal structure. Field-emission scanning electron microscopy images revealed the octahedral and dumbbell-like morphologies for SrMoO4 and SrWO4 crystals. Moreover, it is noted to pass through spindle-like morphology for the microcrystals containing both Mo6+ and W6+ cations (x = 0.25, 0.50, and 0.75). Ultraviolet-visible diffuse reflectance spectroscopy showed a directly proportional increase in the optical band gap (Egap) values from 4.27 to 5.01 eV. These data indicate an increase in the intermediary electronic levels between valance and conduction bands with the increase in the concentration of W6+ cations in the lattice. Finally, we have obtained good sonophotocatalytic performances for SrMoO4 crystals (90%), and mainly to Sr(Mo0.25W0.75)O4 crystals (98%) in the degradation of Rhodamine B dye until 240 min under UV-C light. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Journal of Materials Science: Materials in Electronics is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1007/s10854-022-08985-1
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      – Code: eng
        Text: English
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        PageCount: 26
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    Subjects:
      – SubjectFull: Solid solutions
        Type: general
      – SubjectFull: Metal carbonyls
        Type: general
      – SubjectFull: Crystals
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      – SubjectFull: Conduction bands
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      – SubjectFull: Valence bands
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      – SubjectFull: Tungstates
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      – SubjectFull: Reflectance spectroscopy
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              Text: Oct2022
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