Fig. 1 Schematic illustration for the fabrication of TiO2/C/NiMn-LDH core-double-shell NRAs.
Fig. 2 SEM images of (a) TiO2 NRAs, (b) TiO2/C core-shell NRAs. (inset: (I) side view, and (II) enlarged top view of TiO2 NRAs. The scale bars for (a), (b) and the insets are 10 μm, 10 μm, 5 μm, and 1 μm, respectively).
Fig. 3 XRD patterns of TiO2 NRAs, and carbon-coated TiO2 NRAs.
Fig. 4 TEM and HR-TEM images of (a, b) TiO2 NRs, and (d, e) TiO2/C core-shell NRs, (c) line profile plots for circled area (I) and (II) in Fig. 4(b), (f) the HAAD-STEM image and elemental mapping image of an individual NR of a TiO2/C NR.
Fig. 6 SEM images of (a) NiMn-LDH-decorated TiO2 NR arrays, and (b) NiMn-LDH-decorated TiO2/C core-shell NR arrays on FTO glass. (insets: enlarged view; the scale bars for (a), (b) and their insets are 1 μm, 1 μm, 100 nm, and 100 nm, respectively)
Fig. 7 XRD patterns of NiMn-LDH nanosheetsdecorated TiO2 NRAs and TiO2/C core-shell NRAs.
Fig. 5 (a) XPS spectra and (b) Raman spectra of the obtained TiO2 NRAs and TiO2/C core-shell NRAs.
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