Figure 3

Morphologies of the as-spun nanofibers and the porous after thermal treatment in Ar/H2 at 500°C for 5 h.
(a,b) FESEM images of the as-spun nanofibers; (c,d) the porous MnO/CNFs after thermal treatment in Ar/H2 at 500°C for 5 h; (e) TEM image of the porous MnO/CNFs; (f) HRTEM image of the resulting porous MnO/CNFs corresponding to the area marked with a square in (e).