Fig. 2.
As-obtained aerogel (a) standing on a dandelion, and (b) attracting by a magnet; The SEM images of (c) GCA–M0.2–0, (d) GCA–M0.3–0, (e, f) GCA–M0.2–10, and (g, h) GCA–M0.3–20, (i) elemental mappings of C, Fe, Ni, and O in GCA–M0.3–20. (j) N2 adsorption/desorption isotherms and (k) corresponding pore size distributions for the GCA–M0.2–10 and GCA–M0.3–20. (l) Magnetic hysteresis loops of GCA–M0.2–0, GCA–M0.3–0, GCA–M0.2–10, and GCA–M0.3–20