Parameter Optimisation of Carbon Nanotubes Synthesis via Hexane Decomposition over Minerals Generated from Anadara granosa Shells as the Catalyst Support

Figure 6

The FESEM micrograph of the carbon nanotubes (CNTs) before HNO₃ purified (a) and the FESEM (b) and TEM (c) micrographs of the CNTs after HNO₃ purified. Carbon nanofibres (CNFs) could be also observed from the TEM observations (d).

(a)

(b)

(c)

(d)