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(a) Synthesis process of F-C3N4 by using melamine as precursor and NaCl as a template; (b) kinetic linear fitting curves of F-C3N4 and BCN, Reprinted with permission from [104]. 2020 Royal Society of Chemistry; (c) SEM images of CN, (d) CN-1, (e) CN-3, (f) CN-5, (g) CN-10, and (h) CN-15; (i) band structure and (j) photocatalytic H2 evolution rate of PCN and CN-xs, Reprinted with permission from [109]. 2019 Elsevier.
