Aggravating organic pollutants in water matrices have led to a great challenge for the safety of ecosystems and human health. Periodate-based advanced oxidation processes (PI-AOPs) using Mn-based catalysts with Mn-N coordinates formed by doping Mn to activate PI have gained much attention as they address potential challenges for water purification. However, inefficient utilization efficiency of Mn atoms and the limited Mn-N coordinates in the heterogeneous system remains two formidable challenges. Herein, we first propose exploiting a nitrogen-rich carbonaceous material g-C3N5 as Mn doping parent material to form Mn-N coordinates to activate PI (Mn-doped g-C3N5/PI) for efficient and rapid degradation of organic pollutant Bisphenol F (BPF). Mn-doped g-C3N5/PI exhibits rapid degradation efficiency for BPF (100 % removal ratio in only 5 min) with the rate constant two orders of magnitude higher (149 times) than the g-C3N5/PI. This strategy exhibits the following novelties: (i) N coordination sites employed for the doping of Mn to form Mn-N coordinate bonds for activating PI are directly provided by g-C3N5 rather than by external doping and (ii) abundant N coordination sites in g-C3N5 substantially augment the utilization efficiency of Mn, paving the way for efficient rapid water purification.