Fig. 3From: ZnFe2O4 Nanotapers: Slag Assistant-Growth and Enhanced Photoelectrochemical EfficiencyXRD spectra of the bare ZnO NRs (1), porous structure (2), and REO/ZFO@ZnO NRs (3). The diffraction peaks of ZnO, FTO, Fe2O3, and ZFO are marked by black inverted triangle, black diamond suit, red lozenge, and blue circle, respectivelyBack to article page