“…Carbon-based materials stand out as an exciting porous structure, and the pores can be produced and tuned during the carbonization of large molecules (e.g., polymers, biomolecules). Graphitic carbon nitride (g-C 3 N 4 ), in particular, has emerged as a front runner because of its suitable bandgap ($2.7 eV), chemical stability, as well as the ease of making thin-layer nanosheets and porous structures [16,[28][29][30][31][32][33][34][35]. So far, porous g-C 3 N 4 has shown great photocatalytic capabilities in visible-light water splitting, CO 2 capture, disinfection and etc.…”