fig1
Figure 1. (A) Schematic of the PAN and PIDO NFs[24], Copyright 2018, Wiley-VCH; (B) Schematic diagram of preparing chitosan nanofibers from shrimp shell waste[25], Copyright 2019, Elsevier B.V; (C) Preparation for PAO-CFs[27], Copyright 2020, Elsevier Ltd; (D) Systematic depiction of the reaction pathway for the preparation of FMTnF–SO3H and FMTnF–COOH[28], Copyright 2020, Elsevier Ltd. PAN: Polyacrylonitrile; PIDO NFs: poly(imide dioxime) nanofibers; PAO: poly(amidoxime).
