Fig. 3: Synthesis and structures of the lignin-derived CNTs.
From: Continuously processing waste lignin into high-value carbon nanotube fibers
a Digital image and b SEM image of a CNT sock. c SEM image and d diameter distribution of the CNTs. e, f TEM images of the CNTs. g Raman spectrum and h thermogravimetric analysis (TGA) of the CNTs. i TEM image of the CNTs and catalyst particles. j Lattices of the CNTs and iron catalysts. k Schematic showing the growth mechanism of the CNTs on iron catalysts. l XRD pattern of the CNTs. m Elemental mapping images of the CNTs. n TEM-EDS image of the CNTs and the element contents.
