Bi2S3/K-C3N4 complexes with different loading ratios were prepared by controlling the ratio of Bi2S3 to K-C3N4 in the complex.XRD,TEM,SEM and UV-VIS-DRS were used to characterize the crystal phase and morphology of the catalyst,and formaldehyde was used as the degradation object to evaluate its visible photocatalytic activity.The results showed that under visible light irradiation,the degradation rate of Bi2S3/K-C3N4-0.07 composite catalyst to formaldehyde gas reached 78%within 60 min,which was much higher than that of pure Bi2S3 and K-C3N4.The morphology and properties of the complex were discussed in detail,and the photocatalytic degradation mechanism was further elucidated.
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