Pt@g-C3N4/CeO2 photocatalyst for the remediation of low concentration NOx at room temperature

Pt@g-C3N4/CeO2 photocatalyst was prepared by calcination of g-C3N4/CeO2 mixture followed by impregnating Pt. Under the irradiation of visible light with the presence of water vapor at room temperature, Pt@g-C3N4/CeO2 showed significant performance for remediation of NOx. The deNO(x) mechanism was studied by modified in-situ FTIR. The results proved that NO was prone to adsorb on the surface of Pt@CeO2 and oxidized to nitrite for storage. Then, the photoinduced hydrogen on Pt@g-C3N4 component could diffuse into the vicinity of nitrite through the spillover effect of Pt and reacted with nitride to produce N-2 and H2O.