Fig. 2.
SEM images of a pristine CNTF, b, c Ni(OH)2@CNTF, and d KNHCF@CNTF. e EDS spectrum of KNHCF cube and f corresponding elemental mappings. g XRD patterns of KNHCF@CNTF, Ni(OH)2@CNTF, and pristine CNTF; XPS survey scan of h Ni 2p and i Fe 2p
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