Figure 3.
SEM images of (a) PVA/PAA nanofibers; (b) PVA/PAA/Fe3O4/MXene nanofibers; (c) PVA/PAA/Fe3O4/MXene nanofibers with thermal treatment for 5 h; and (d) typical TEM image of cube Fe3O4 NPs inside nanofiber.
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