Mechanochemically assisted solid state synthesis, characterization, and catalytic properties of MgWO4

Gancheva, Maria; Naydenov, A.; Iordanova, R.; Nihtianova, D.; Stefanov, P.

doi:10.1007/s10853-015-8904-5

Cited by 16 publications

(6 citation statements)

References 47 publications

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“…Other tungsten-based catalysts were employed for VOC abatement. For instance, magnesium tungstate (MgWO 4 )-based catalysts were evaluated by Gancheva et al in CO and hydrocarbon oxidation [286]. Four catalysts were tested: pure MgWO 4 (5.2 m 2 g −1 ), MgWO 4-3%WO 3 (4.0 m 2 g −1 ) and these materials promoted by 0.5% Pd.…”

Section: Voc Oxidation On Tungsten Catalysts (Non-photocatalyzed Reactions)mentioning

confidence: 99%

Tungsten-Based Catalysts for Environmental Applications

2021

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This review aims to give a general overview of the recent use of tungsten-based catalysts for wide environmental applications, with first some useful background information about tungsten oxides. Tungsten oxide materials exhibit suitable behaviors for surface reactions and catalysis such as acidic properties (mainly Brønsted sites), redox and adsorption properties (due to the presence of oxygen vacancies) and a photostimulation response under visible light (2.6–2.8 eV bandgap). Depending on the operating condition of the catalytic process, each of these behaviors is tunable by controlling structure and morphology (e.g., nanoplates, nanosheets, nanorods, nanowires, nanomesh, microflowers, hollow nanospheres) and/or interactions with other compounds such as conductors (carbon), semiconductors or other oxides (e.g., TiO2) and precious metals. WOx particles can be also dispersed on high specific surface area supports. Based on these behaviors, WO3-based catalysts were developed for numerous environmental applications. This review is divided into five main parts: structure of tungsten-based catalysts, acidity of supported tungsten oxide catalysts, WO3 catalysts for DeNOx applications, total oxidation of volatile organic compounds in gas phase and gas sensors and pollutant remediation in liquid phase (photocatalysis).

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Section: Voc Oxidation On Tungsten Catalysts (Non-photocatalyzed Reactions)mentioning

confidence: 99%

Tungsten-Based Catalysts for Environmental Applications

2021

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“…The changes in intensity and position of the FTIR bands after impregnation may be related to a strong interaction between magnesium and tungstate anions, it is possible that under the conditions of the impregnation there was a mechanochemical synthesis of amorphous MgWO 4 similar to previous reports. [40] The authors of this study assigned the bands at 880 and 850 cm À 1 to the vibrations of the WO 2 group present in W 2 O 8 .…”

Section: Chemistryselectmentioning

confidence: 81%

Oxidation of Cyclopentene with Manganese Oxides Octahedral Molecular Sieves with Layer and Tunnel Structures

et al. 2022

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Manganese oxides type octahedral molecular sieves OL-1, OMS-1, and OMS-2 were synthesized, impregnated with sodium tungstate, and evaluated as catalysts for the selective epoxidation of cyclopentene (CPE) to cyclopentene oxide (CPO) in the sodium bicarbonate/hydrogen peroxide (BAP) system. OL-1 was the best catalyst with a conversion of 78.6 % and a selectivity to CPO of 31.4 %. Impregnation with sodium tungstate affected the structure and activity of OL-1 and OMS-1. Mn 2 + is required for the epoxidation of CPE. FTIR spectra provides evidence that tungstate ions react, during impregnation, with Mg 2 + and/or Mn 2 + present in OMS-1 and OL-1 producing an amorphous compound that is not active in the epoxidation reaction. The crystalline and chemical structure of OMS-2 was not affected by tungstate impregnation, since most of the manganese occurs as Mn 3 + and Mn 4 + , which in presence of hydrogen peroxide, tend to form radicals, active in the total oxidation of organic compounds.

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“…Under these conditions, specific morphologies temporarily formed (such as flakes and rods) are destroyed in the collision of stainless balls, which can be confirmed by previous reports on the ball-milling product. 23,24 Fig. S3 (ESI†) displays the SEM images of all samples that corresponds with the XRD measurements, detailing how the particle size increased with temperature.…”

Section: Resultsmentioning

confidence: 99%

Green preparation of CoMoO₄ nanoparticles through a mechanochemical method for energy storage applications

et al. 2022

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Mechanochemically assisted solid state synthesis, characterization, and catalytic properties of MgWO4

Cited by 16 publications

References 47 publications

Tungsten-Based Catalysts for Environmental Applications

Tungsten-Based Catalysts for Environmental Applications

Oxidation of Cyclopentene with Manganese Oxides Octahedral Molecular Sieves with Layer and Tunnel Structures

Green preparation of CoMoO₄ nanoparticles through a mechanochemical method for energy storage applications

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Mechanochemically assisted solid state synthesis, characterization, and catalytic properties of MgWO4

Cited by 16 publications

References 47 publications

Tungsten-Based Catalysts for Environmental Applications

Tungsten-Based Catalysts for Environmental Applications

Oxidation of Cyclopentene with Manganese Oxides Octahedral Molecular Sieves with Layer and Tunnel Structures

Green preparation of CoMoO4 nanoparticles through a mechanochemical method for energy storage applications

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Product

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Green preparation of CoMoO₄ nanoparticles through a mechanochemical method for energy storage applications