Simple hydrothermal preparation of sulfur fluoride-doped g-C3N4 and its photocatalytic degradation of methyl orange

Abstract

By doping F and S elements, a graphite phase carbon nitride (g-C3N4) photocatalyst with exfoliated layers, namely, sulfur fluoride-doped carbon nitride (F-SCN), was successfully synthesized, which can effectively photocatalyze the degradation of methyl orange (MO). Based on the effect of different fluorination ratios on the degradation efficiency of MO, the optimal fluorination modification conditions of the material were obtained. It was found that doping with F and S elements significantly enhanced the electron-hole pair separation ability and charge transfer efficiency of the g-C3N4 photocatalyst, thus improving the photocatalytic performance. The results of the photocatalytic experiment show that the degradation rate of MO by F-SCN reached 62 % in 1 h, which was 3.7 and 1.4 times that of BCN and SCN, respectively, and the removal rate reached 77 % in 1 h, which was 3.8 times the rate of BCN and 1.6 times the rate of SCN.