A novel CeO2-based nano hollow sphere/g-C3N4 nanocomposite is successfully synthesized through a simple in-situ polystyrene ball template method by using Ce(NO3)3?6H2O and melamine as raw materials,and used for the degradation of p-nitroaniline(PNA)under ultraviolet light irradiation.The results indicate that the degradation rate of PNA reaches 90.26%when the mass fraction of CeO2 in the composite is 2.5%.It is verified through dynamic fitting that the photocatalytic degradation process of PNA conforms to the characteristics of pseudo first-order reaction kinetics.PNA degradation rate constant(k=0.011 0 min-1)of CeO2 hollow nanospheres/g-C3 N4 composite is 2.8 times and 5.8 times those of g-C3 N4(k= 0.006 0 min-1)and CeO2(k=0.002 3 min-1),respectively.The heterostructure formed between CeO2 and g-C3 N4 promotes the separation of photo generated carriers and prolongs their lifespan,thereby improves the photocatalytic performance.
CeO2 nanospheresg-C3N4photocatalytic degradationp-nitroanilinefirst order reaction kinetics
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