g-C(3)N(4)/CeO(2) Binary Composite Prepared and Its Application in Automobile Exhaust Degradation

Vehicle exhaust seriously pollutes urban air and harms human health. Photocatalytic technology can effectively degrade automobile exhaust. This work prepared g-C(3)N(4)/CeO(2) photocatalytic material by constructing heterojunctions. Four kinds of g-C(3)N(4)/CeO(2) composite photocatalytic materials with different mass ratios were prepared. An indoor exhaust gas purification test was carried out under natural light and ultraviolet light irradiations. The optimum mass ratio of g-C(3)N(4) material and CeO(2) material was determined by evaluating the exhaust gas degradation effective. Moreover, the structure and morphology of the g-C(3)N(4)/CeO(2) composite were investigated with microscopic characterization experiments (including XRD, TG-DSC, FT-IR, UV-Vis, SEM and XPS). The results obtained were that the optimum mass ratio of g-C(3)N(4) material to CeO(2) material was 0.75. The degradation efficiencies under ultraviolet irradiation in 60 min for HC, CO, CO(2), NO(X) were 7.59%, 12.10%, 8.25% and 36.82%, respectively. Under visible light conditions, the degradation efficiency in 60 min for HC, CO, CO(2) and NO(X) were 15.88%, 16.22%, 10.45% and 40.58%, respectively. This work is useful for purifying automobile exhaust in the future.