Fig. 5

(A) cyclic voltammetry (CV) of (a) [PAN], (b) [PAN-PPh.], and (c) [PAN-PPh./Fe3O4] nanofibers GCEs v of 50 mV s− 1. (B) cyclic voltammetry (CV) of [PAN-PPh./Fe3O4] nanofiber electrode at various v mV s− 1.

(A) cyclic voltammetry (CV) of (a) [PAN], (b) [PAN-PPh.], and (c) [PAN-PPh./Fe3O4] nanofibers GCEs v of 50 mV s− 1. (B) cyclic voltammetry (CV) of [PAN-PPh./Fe3O4] nanofiber electrode at various v mV s− 1.