fig2

Figure 2. (A) Preparation process of the CNTs aerogel; (B) images of CNTs aerogel fabricated using template method. (A and B) Reproduced with permission^[37]. Copyright 2019, WILEY‐VCH; (C) Synthesis and modification of MWCNTs by CVD, (D) photographs of large-size MWCNTs film, (E) TEM image of MWCNTs, (F) Raman spectroscopy of MWCNTs. (C-F) Reproduced with permission^[39]. Copyright 2022, WILEY‐VCH; (G and H) Morphology, (I) Raman spectra and (J) TEM image of graphene-based aerogels, (K) stress-stain curve and (L) TE responses of graphene aerogel. (G-L) Reproduced with permission^[47]. Copyright 2022, American Chemical Society; (M) Optical photographs, (N) preparation process and (O) Raman spectra film. (M-O) Reproduced with permission^[48]. Copyright 2019, Elsevier Ltd. CNTs: Carbon nanotubes; MWCNTs: multi-walled carbon nanotubes; CVD: chemical vapor deposition; TEM: transmission electron microscope; TE: thermoelectric; SWCNT: single-walled carbon nanotube; TCNQ: tetracyanoquinodimethane; PEI: polyethyleneimine.