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Bimetallic defect-engineered CoMoMOF modulates CdZnS for efficient hydrogen production from water/microplastic waste
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DOI：10.1039/D5GC04815J.png)
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Abstract
En 中文
Defect regulation represents a crucial strategy for enhancing the separation efficiency of photogenerated carriers. In this study; a V-CoMoMOF (V-CMM) catalyst with Co and Mo dual-metal defects was synthesized via NaOH etching. It was then combined with CdZnS (CZS) to form a type-I heterojunction. The composite photocatalyst CZS/V-CMM-20% with bimetallic defects shows high-efficiency hydrogen evolution activity (1525 μmol) within 5h; which is approximately twice that of CZS/CMM. Moreover; CZS/V-CMM-20% exhibits notable hydrogen evolution performance (258.9 μmol) from polyethylene terephthalate (PET) waste under the same conditions. Density functional theory (DFT) studies reveal that the incorporation of bimetallic defects significantly improves the charge transfer kinetics and accelerates surface catalytic reactions. Moreover; the formation of type-I heterojunctions confines both electrons and holes within the same semiconductor; leading to localized exciton states that enhance light absorption. This study provides novel insights into the design of defect-engineered composite photocatalysts; and proposes a promising strategy for the conversion of waste plastics into hydrogen energy.
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9.2
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1.3W
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7.6W
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