Abstract
Vehicle exhaust seriously pollutes urban air and harms human health. Photocatalytic technology can effectively degrade automobile exhaust. This work prepared g-C3N4/CeO2 photocatalytic material by constructing heterojunctions. Four kinds of g-C3N4/CeO2 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-C3N4 material and CeO2 material was determined by evaluating the exhaust gas degradation effective. Moreover, the structure and morphology of the g-C3N4/CeO2 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-C3N4 material to CeO2 material was 0.75. The degradation efficiencies under ultraviolet irradiation in 60 min for HC, CO, CO2, NOX were 7.59%, 12.10%, 8.25% and 36.82%, respectively. Under visible light conditions, the degradation efficiency in 60 min for HC, CO, CO2 and NOX were 15.88%, 16.22%, 10.45% and 40.58%, respectively. This work is useful for purifying automobile exhaust in the future.
Highlights
While the development of science and technology has created a lot of wealth for human society, it consumes a lot of energy and emits a large amount of waste gas and water, causing serious environment pollution and endangering humans’ health [1]
O2 was adsorbed on the surface of g-C3 N4 /CeO2 catalyst to form O−
The main content of this work is that a g-C3 N4 /CeO2 heterostructure nanocomposite was prepared
Summary
While the development of science and technology has created a lot of wealth for human society, it consumes a lot of energy and emits a large amount of waste gas and water, causing serious environment pollution and endangering humans’ health [1]. Graphite phase carbon nitride is a non-metallic semiconductor material with the advantages of non-toxicity, low cost, and easy preparation. It is widely used in the production of clean renewable energy and environmental pollution control technologies. The cerium oxide material is a good catalyst with good oxygen storage and redox properties It is a cubic fluorite-type structure that is composed of a face centered cubic cation and an anion occupying the octahedral gap position [23]. This work prepared a g-C3 N4 /CeO2 heterostructure composite photocatalytic material with different mass ratios. XRD, TG-DSC, FT-IR, UV-Vis, SEM, and XPS were executed to verify the performance of the g-C3 N4 /CeO2 material
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