Physiochemical characterizations of nanobelts consisting of three mixed oxides (Co₃O₄, CuO, and MnO₂) prepared by electrospinning technique

In this work, nanobelt mats consisting of three potential metal oxides have been produced using the electrospinning technique. An aqueous solution of cobalt acetate tetra-hydrate, copper acetate mono-hydrate, and manganese acetate tetra-hydrate was mixed with poly(vinyl alcohol) solution to prepare a sol-gel which was electrospun at 20 kV. The obtained nanofiber mats have been vacuously dried at 80°C for 24 h and then calcined in air atmosphere at different temperatures and soaking times. The utilized physiochemical characterizations have affirmed that nanobelts composed of three oxides (Co₃O ₄, CuO, and MnO₂) can be prepared by calcination at a temperature of 600°C for 1 h. High-resolution transmission electron microscope and selected area electron pattern images revealed good crystallinity for the synthesized nanobelts.