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. 2019 Apr 4;4(4):6312–6323. doi: 10.1021/acsomega.9b00243

Figure 4.

Figure 4

SEM images of neat PVDF (a), PVDF/2 wt % Fe2O3 (b), PVDF/2 wt % Ce–Fe2O3 (c), PVDF/2 wt % Co3O4 (d), and PVDF/2 wt % Ce–Co3O4 (e) samples. The inset shows the distribution of fiber diameter for the composite nanofibers containing Ce-doped metal oxides.