Synthesis and characterization of high surface area mesoporous manganese oxides nanofibers prepared by electrospinning technique

The electrospinning technique is used to synthesize several types of mesoporous manganese oxides, namely Mn₂O₃, Mn₃O₄, and hybrid manganese oxides. The as-spun nanofibers are heated at different temperatures from 500 to 1000 °C for 2 h. XRD analysis reveals that the Mn₂O₃ phase starts to form at 500 °C, whereas at 900 °C, Mn₂O₃ and Mn₃O₄ are co-existent and at 1000 °C, Mn₃O₄ is the sole phase. The mesoporous material’s behavior can be seen in all isotherms of the prepared manganese oxide nanofibers. The maximum surface area of 1306.98 m²/g is achieved for the sample calcined at 500 °C, which is one of the highest surface areas recorded for Mn₂O₃ as compared with the literature.