“…The Schottky junction, as a type of heterojunction, can separate charge carriers, prevent backflow of electrons, and achieve maximum charge separation. 13,14 At present, noble metals (such as Pt 15 or Ag 16 ), transition metal phosphates (TMPs) (such as MoP 17 or Ni 2 P 18 ), transition metal sulfides (TMSs) (such as NiS 2 19 or MoS 2 20 ), as co-catalysts for g-C 3 N 4 , have been extensively studied in water splitting and pollutant degradation. However, loading TMPs on semiconductors usually leads to poor dispersion of TMPs, while noble metals are expensive and scarce.…”