A Comparative Study of the Effect of MgO and CaCO₃ as Support Materials in the Synthesis of Carbon Nanotubes with Fe/Co as Catalyst

Figure 3

High-resolution transmission electron micrograph (HR TEM) of nanomaterial synthesized from Fe/Co supported on magnesium oxide ((a)–(c)) and Fe/Co supported on calcium carbonate ((d)–(f)).

(a)

(b)

(c)

(d)

(e)

(f)