Synthesis and characterization of manganese tetroxide (Mn3O4) nanofibers by electrospinning technique

Abstract

Abstract:Manganese tetroxide (Mn 3 O 4 ) nanofibers were prepared by electrospinning homogeneous viscous solution of 20 wt%, 28 wt% and 36 wt% manganese acetate in poly vinyl alcohol (PVA) and calcining the nanofibers at 1000 ℃ for 2 h. Electrospinning was carried out at 9 kV DC with tip to collector distance (TCD) of 7 cm. Thermo gravimetric analysis (TGA) of the fibers indicates the pure phase of manganese oxide above 500 ℃. XRD analysis of calcined (at 1000 ℃) nanofibers indicates the formation of phase-pure tetragonal Mn 3 O 4 . Scanning electron microscopy (SEM) studies show the fibers cylindrical with the diameters in the range of 100-600 nm and aspect ratio > 1000. In general, the average diameter of the green fibers decreases with the increase in manganese acetate concentration. The diameter of calcined nanofibers is reduced by 34%.

Mn and As doping of β-FeSi2via a chemical method

“…Aer the precipitation, the precipitate was dried, powdered and calcined at 600 C for 6 h. During the calcination, the dehydration of manganese acetate occurred within the range of 100-190 C, followed by complete decomposition between 230 C and 480 C. This was further followed by the full decomposition of organics at 600 C. Therefore, calcination resulted in the tetragonal phase of Mn 3 O 4 as reported by Sahoo et al, along with the generation of Mn 2 O 3 under an atmosphere of abundant oxygen. 26 Therefore, the product was a mixed oxide of [{Fe 2 O 3 $4SiO 2 } + Mn 2 O 3 + Mn 3 O 4 ].…”

Electrospun nanofiber-based respiratory face masks—a review

“…A drum collector warped with aluminium foil is connected to neutral/opposite polarity acts as a counter electrode for collection of fibers. To prepare ceramic fibers, ceramic precursors (in the range of 30 to 50%) are doped into polymer solution [ 26 , 27 ]. When applied voltage crosses a limiting value, a thin jet is ejected from the solution droplet.…”

Synergistically Enhanced Oxygen Evolution Catalysis with Surface Modified Halloysite Nanotube

“…Recent studies on manganese oxide catalysts were mainly underway to increase their active surface area and inter-connectivity by tailoring their electrode scaffold design with various preparation methods, including porous or fiberized structure [19,20]. For example, the electrospinning method could also be a possible way to fabricate MnO 2 based nanofibers with increased active surface area and inter-connectivity [21][22][23][24]. The mesoporous structure is also studied for an electrode material in water electrolysis and supercapacitor, increasing electrode surface as well as structural stability [25,26].…”