fig2
Figure 2. (A) XRD pattern, (B) Raman spectra, (C) SEM images of OHC-1; (D and E) SEM images of HC-1 at different magnifications and (F) EDS image of HC-1. XRD: X-ray diffraction; SEM: scanning electron microscopy; EDS: energy-dispersive X-ray spectroscopy.
