fig5
![Recycling valuable materials from the spent lithium ion batteries to catalysts: methods, applications, and characterization](https://image.oaes.cc/df092ec8-532d-4026-b0bd-55557e43efb0/cs3066.fig.5.jpg)
Figure 5. (A) Schematic illustration of the preparation of N- and Fe-doped carbon-based catalysts recovered from spent LIBs. Quoted with permission from Ruan et al.[58]; (B) Schematic diagram of reaction mechanism of CuO/C catalyst recovered from spent LIBs to activate PS for RhB degradation. Quoted with permission from Zhao et al.[59]. LIBs: Lithium-ion batteries; PS: peroxymonosulfate; RhB: Rhodamine B.