4.6 Article

The enhanced photocatalytic activity of TiO2(B)/MIL-100(Fe) composite via Fe-O clusters

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NEW JOURNAL OF CHEMISTRY
卷 46, 期 2, 页码 739-746

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ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nj04569e

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  1. Education Department of Jilin Province [52062020]
  2. [JJKH20210541KJ]

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The integration of MIL-100(Fe) with TiO2(B) composite exhibited high photocatalytic activity due to the unique Fe-O-Ti bonds and Fe-O clusters that promoted charge transfer and improved catalytic activity. This achievement contributes to understanding and designing charge transfer pathways in MOF/semiconductor photocatalysts integration.
Black TiO2 and metal-organic frameworks (MOF) are great materials with light-harvesting ability, redox power and consequently catalytic activity. Here, the integration of MIL-100(Fe) with TiO2(B) composite was designed for photocatalytic application, which greatly promoted light-harvesting and charge transfer. As expected, the integrated TiO2(B)/MIL-100(Fe) composite showed high photocatalytic activity due to unique Fe-O-Ti bonds that were constructed, which acted as an electronic tunnel to reduce electronic transfer resistance between MIL-100(Fe) and TiO2(B). In addition, the presence of Fe-O clusters in MIL-100(Fe) can also promote the charge dissociation and improve catalytic activity via the Fe3+/Fe2+ redox cycle. This achievement would help us to understand and design charge transfer pathways in the integration of MOF/semiconductor photocatalysts.

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