“…The phase and structure characteristics of Fe 3 O 4 , MOF(Co), and Fe 3 O 4 @MOF(Co) were examined by X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS). As shown in Figure S4, Fe 3 O 4 nanoparticles yielded the characteristic XRD peaks indexed at 2θ = 30.01, 35.40, 43.19, 53.30, 57.09, 62.82, and 74.36°, which correspond to the reflection plane indices of (220), (311), (400), (422), (511), (440), and (622), respectively . As for the XRD pattern of the MOF(Co), all of the well-defined diffraction peaks of the as-synthesized MOF match well with the XRD patterns that are reported in the literature and are consistent with the simulated crystalline structure based on the crystallographic information file from Cambridge Crystallographic Data Centre (CCDC 985792) (Figure b) .…”