CO oxidation over Cu2O deposited on 2D continuous lamellar g-C3N4

Cu2O deposited on 2D continuous lamellar g-C3N4 (Cu2O/g-C3N4) was prepared via a facile impregnation-chemical reduction procedure. The composition, structure and morphology of as-prepared Cu2O/g-C3N4 were characterized by XRD, SEM, TEM, CO-TPR, FT-IR and nitrogen adsorption, respectively. The influence of Cu2O loading on the performances of Cu2O/g-C3N4, e.g. adsorption ability for methyl orange (MO) and the stability as well as catalytic activity for CO oxidation, was investigated. The changing trend of adsorption ability and the catalytic activity of Cu2O/g-C3N4 moved in the same direction. When the mass ratio of Cu2O to g-C3N4 was 4: 10, the as-prepared composite exhibited the strongest adsorption ability and the highest catalytic activity; it also showed excellent stability in CO oxidation and over it the 100% conversion of CO was kept for more than 12 h under reaction conditions. The strong adsorption ability and good catalytic performance of Cu2O/g-C3N4 were ascribed to the synergetic effects between g-C3N4 and Cu2O as well as the improved dispersibility and the decreased particle size of Cu2O.