Details

Autor(en) / Beteiligte

• Lazarova, Ts
• Kovacheva, D.
• Georgieva, M.
• Tzankov, D.
• Tyuliev, G.
• Spassova, I.
• Naydenov, A.

Titel

Tunable nanosized spinel manganese ferrites synthesized by solution combustion method

Ist Teil von

• Applied surface science, 2019-12, Vol.496, p.143571, Article 143571

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The influence of the glycine-glycerol fuel mixing ratio on the structure, morphology, magnetic and catalytic properties of nanosized MnFe2O4 prepared by solution combustion method was investigated. The samples were synthesized using mixture of glycerol and glycine in the reducing power ratios 1:0, 0.75:0.25, 0.5:0.5, and 0.25:0.75. All samples were characterized by powder X-ray diffraction, N2-physisorption at 77 K, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and H2-thermal programmed reduction. Magnetic behavior of the ferrites at room temperature was investigated. It was demonstrated that by varying the glycerol to glycine ratio, samples with different magnetic properties can be prepared. The catalytic properties of MnFe2O4 were studied in reactions of complete oxidation of hydrocarbons (methane, ethane, propane, butane) as model substances. The results reveal that structural, surface and morphological characteristics of the prepared spinels could be tuned by varying the ratios in the fuel mixtures. The nanoparticles obtained with glycerol and with a mixture fuel with glycine up to 50% show better catalytic oxidation properties than the sample obtained with a fuel containing 75% glycine. After the catalytic tests these samples do not undergo any substantial phase and morphological changes, thus they could be applied in low temperature combustion. [Display omitted] •MnFe2O4 is prepared by solution combustion method with mixed fuels.•Glycine-glycerol ratio affects MnFe2O4 morphology, magnetic and catalytic properties.•Surface and morphological characteristics could be tuned by the fuel mixture ratios.•MnFe2O4 obtained with glycine up to 50% shows useful oxidation properties.