Fe-Mo-O doping g-C3N4 exfoliated composite for removal of rhodamine B by advanced oxidation and photocatalysis

Abstract

Fe-Mo-O doping g-C3N4 exfoliated composite was fabricated and characterized by XRD, FT-IR, UV–vis, SEM, TEM, XPS and N2 adsorption–desorption techniques. The as-prepared composite was composed of MoO3, FeMoyOx and exfoliated g-C3N4 crystals, and thus demonstrated high efficiency for degradation of Rhodamine B by advanced oxidation due to the rapid decomposition of H2O2 over the composite catalyst, giving 99 % degradation rate within oxidation time of 15 min. Also, it demonstrated high activity for photocatalytic degradation of Rhodamine B under visible light, achieving > 99 % degradation rate. The high catalytic activity for advanced oxidation and photocatalysis was mainly ascribed to the Fe/Mo dual ion synergy system that could effectively protect Fe (II), or heterojunctions on exfoliated g-C3N4 that could inhibit the recombination of photogenerated electrons and holes. Moreover, the composite catalyst presented an excellent recovery and reusability for advanced oxidation and photocatalytic degradation.