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Light-Driven Schottky Effect to Optimize Pt Charge Transfer on Metal–Organic Frameworks for Efficient H2O2 Activation
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DOI：10.1002/adfm.76971.png)
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Abstract
En 中文
The suboptimal catalytic activity of nanozymes arising from inefficient electron transfer represents a major challenge in the field of biomimetic catalysis. In this work, inspired by the photo-responsive nanozymes, Pt nanoparticles were loaded on ZIF-8, MIL-53, and UiO-66 for efficient light-enhanced peroxidase-like activity. Results reveal that Pt@UiO-66, with a moderate Schottky barrier height, exhibits the highest light-enhanced H2O2 activation efficiency. Specifically, a moderate Schottky barrier height facilitates the efficient transfer of photogenerated electrons from the MOFs to the Pt nanoparticles, while simultaneously inhibiting the back-transfer of hot electrons from the Pt nanoparticles. As a result, the Pt@UiO-66 exhibits the optimal electron–hole separation efficiency and the highest charge density on Pt, which improves the utilization efficiency of photogenerated electrons and thereby enhances the activation of H2O2. Ultimately, compared to dark conditions, Pt@UiO-66 exhibits a notably lower limit of detection for perfluorodecanoic acid under light irradiation, providing new insights for developing colorimetric biosensors with higher sensitivity of Pt-based catalysts.
Keywords:
H2O2 activation
metal–organic frameworks
perfluorododecanoic acid
schottky junction
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3.4W
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