Effect of cation insertion on the stability of gliding arc plasma-precipitated mesoporous MnO2 dye bleaching catalysts

α-MnO 2 and γ-MnO 2 polymorphs were, respectively, obtained from the plasma precipitation of KMnO 4 and Mn(CH 3 COO) 3 ⋅2H 2 O precursors. The obtained powders were calcined at 150 °C, 210 °C and 400 °C, and characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectrosc...

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Bibliographic Details
Published in:Journal of materials research Vol. 38; no. 17; pp. 4144 - 4156
Main Authors: Boyom-Tatchemo, Franck W., Devred, François, Acayanka, Elie, Kamgang-Youbi, Georges, Nzali, Serge, Laminsi, Samuel, Gaigneaux, Eric M.
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 14.09.2023
Springer Nature B.V
Subjects:
Applied and Technical Physics
Biomaterials
Bleaching
Catalysis
Cations
Chemistry and Materials Science
Crystal structure
Crystallinity
Decomposition
Dyes
Fourier transforms
Infrared analysis
Inorganic Chemistry
Insertion
Manganese dioxide
Materials Engineering
Materials Science
Metal oxides
Nanomaterials
Nanotechnology
Oxidation
Photoelectrons
Plasma
Potassium permanganate
Raman spectroscopy
Roasting
Temperature
Thermal stability
Thermogravimetric analysis
Vibration
X ray photoelectron spectroscopy
Calcination
Plasma-precipitated MnO
Catalytic stability
Cation insertion
ISSN:0884-2914, 2044-5326
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Summary:α-MnO 2 and γ-MnO 2 polymorphs were, respectively, obtained from the plasma precipitation of KMnO 4 and Mn(CH 3 COO) 3 ⋅2H 2 O precursors. The obtained powders were calcined at 150 °C, 210 °C and 400 °C, and characterized by X-ray diffraction, Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), Thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), nitrogen physisorption and Scanning electron microscopy (SEM). As a result, the calcination does not significantly affect textural properties and crystalline structure of the α-MnO 2 , while γ-MnO 2 is transformed into β-MnO 2 for temperatures above 400 °C. The thermal stability α-MnO 2 is due to the K + ions insertion in its 4.6 Å × 4.6 Å tunnels and corroborated the catalytic performance of 100, 98, 98 and 97% compared to 71, 54, 52 and 48% for γ-MnO 2 after four successive reuse cycles on Tartrazine Yellow dye. The insertion of cationic species (K + , Na + , Mg 2+ ) into the structure of MnO 2 reinforces its crystalline structure and promotes the formation of powerful oxidizing species through oxygen vacant sites. Graphical Abstract
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ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-023-01129-z