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. Author manuscript; available in PMC: 2019 Jun 22.
Published in final edited form as: Chem Rev. 2019 Mar 27;119(8):5298–5415. doi: 10.1021/acs.chemrev.8b00593

Figure 23.

Figure 23.

(A) SEM and (B) TEM images of macroporous carbon fibers fabricated by etching the hybrid fibers made of carbon, SiO2, and Sb in an aqueous HF solution to remove the SiO2 and Sb nanoparticles. (C and D) SEM images of the (C) surface and (D) cross-section of porous TiO2 nanofibers obtained by calcining electrospun core−sheath nanofibers to remove both PS and PVP. (A and B) Reprinted with permission from ref 408. Copyright 2018 American Chemical Society. (C and D) Reprinted with permission from ref 194. Copyright 2004 American Chemical Society.