Abstract
A series of composites based on Fe-based MOF (Fe-BDC) and CdSe quantum dots (CdSe QDs) have been synthesized with CdSe QDs well-embedded into Fe-BDC particles, which are characterized by XRD, SEM, TEM, ICP-OES, FT-IR, N 2 physical sorption, UV–visible DRS, PL and electrochemical measurements. By detecting the degradation of Rhodamine B (RhB) in aqueous solution under visible light irradiation, the photocatalytic performance of CdSe@Fe-BDC nanocomposites were apparently improved by 5.8 times relative to single Fe-BDC, which can be attributed to the heterostructure formed in CdSe@Fe-BDC. Owing to the perfect interfacial contact, this promotes electron transfer from CdSe to Fe-BDC and significantly facilitates the separation of the photogenerated electron-hole pairs. The photocatalytic mechanism studied by adding sacrificial agents revealed that the predominant active species in the system is hole cation (h + ) and oxygen free radicals (•O 2 − ). A series of composites based on Fe-BDC and CdSe quantum dots have been prepared and the resultant composites show excellent photocatalytic performance in RhB degradation. • A novel CdSe@Fe-BDC nanocomposite was synthesized and characterized. • CdSe QDs were uniformly dispersed in Fe-BDC particles. • CdSe@Fe-BDC exhibited an enhanced visible-light photocatalytic degradation of RhB in water. • The mechanism for photocatalytic degradation of RhB of CdSe@Fe-BDC was proposed.
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