The Formation of Carbon Nanostructures via Catalytic Pyrolysis of Naphthalene under Its Autogenic Pressure

Figure 4

TEM images of CNCs and CNTs nanostructures prepared at 900°C. The images of high magnification are in the left-top corner of (a)-(b), respectively. (a) and (b) are the images of CNCs and CNTs with the naphthalene/nickel acetate tetrahydrate ratio of 3 : 1. (c) and (d) are the images of CNCs and CNTs with the naphthalene/nickel acetate tetrahydrate ratio of 7 : 1 (after graphitization at 2800°C).

(a)

(b)

(c)

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