Preparation and photocatalytic performance of Co-MOF-74@g-C3N4
In this paper,a novel g-C3N4-based composite photocatalyst Co-MOF-74@g-C3N4 was suc-cessfully synthesized by a simple self-assembly method.The structure and morphology of the catalysts were char-acterized by FT-IR,XRD,SEM and BET,the photocatalytic degradation performance of Co-MOF-74@g-C3N4 on the organic dye methyl orange was investigated,and the possible mechanism of the photocatalytic reac-tion were also probed.The results showed that after 90 min of simulated sunlight irradiation,the degrada-tion rate of 10 mg/L methyl orange aqueous solution by composite photocatalyst Co-MOF-74@g-C3N4 reached 82.48％,which was 3.15 and 1.52 times that of single Co-MOF-74 and g-C3N4,respectively.After 5 cycles of experiments,the photocatalytic degradation rate of Co-MOF-74@g-C3N4 for methyl orange remained at 80.92％,which could be reused.The construction of the heterojunction of Co-MOF-74 and g-C3N4 increases the catalytic active site,improves the utilization efficiency of visible light,and facilitates the carrier aggregation and rapid separation at the heterointerface,which makes the composite photocatalyst Co-MOF-74@g-C3N4 have excellent photocatalytic activity and stability.
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