Fig. 2: Formation and characterizations of MH-HISs. | Nature Communications

Fig. 2: Formation and characterizations of MH-HISs.

From: Tandem-biocatalysis reactors constructed by topological evolution of CaCO3 particles into hollow metal hydroxide spheres

Fig. 2

a–d DIC images of Fe-HISs, Ru-HISs, V-HISs, and Fe/Ru/V-HISs. Insets: photographs of MH-HIS suspensions. e–l Characterizations of Fe-HISs. e–g FE-SEM and TEM images. Black arrows in (g) indicate the porous shell. h Narrow-scan XPS spectrum showing the presence of Fe–O (529.7 eV) and Fe–OH (531.2 eV) bonds. i–l High-angle annular dark-field (HAADF) and EDX mapping images. Scale bar: 2 µm (a–d), 1 µm (e, f, i–l), and 100 nm (g). The experiments were repeated independently five times with similar results.

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