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A novel 2D/1D core-shell heterostructures coupling MOF-derived iron oxides with ZnInS for enhanced photocatalytic activity.

08:00 EDT 9th March 2020 | BioPortfolio

Summary of "A novel 2D/1D core-shell heterostructures coupling MOF-derived iron oxides with ZnInS for enhanced photocatalytic activity."

1D spindle-like iron oxides with controllable phase were synthesized by using MIL-88A-templated pyrolysis under different atmospheres, thermal annealing in N to obtain FeO and in air to obtain α-FeO. Then, 2D/1D core-shell heterostructures (ZnInS@FeO and ZnInS@α-FeO) were constructed by in-situ self-assembly strategy. Characterizations indicated that the 2D ultra-thin ZnInS shell with 0.3 μm was homogeneously coated on the surface of 1D FeO/α-FeO core with 1 μm, and ZnInS@FeO exhibited higher BET surface area (84.5 m g) compared with ZnInS@α-FeO (17.8 m g), providing more exposed active sites and larger contact area. The ZnInS@FeO-5 showed the best photocatalytic activity of RhB degradation as compared to ZnInS, FeO and ZnInS@α-FeO. In addition, the degradation rates of MB, BPA and MO over ZnInS@FeO were much higher than that of ZnInS@α-FeO. The proposed photocatalytic mechanism was also discussed: the FeO as an electron acceptor caused Fe/Fe cycle in ZnInS@FeO and ZnInS@α-FeO followed the Z-scheme mechanism.

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This article was published in the following journal.

Name: Journal of hazardous materials
ISSN: 1873-3336
Pages: 122500

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