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We report a facile synthesis of carbon quantum dot (CQD)-sensitized TiO 2 /Pt nanocomposites as efficient and robust photocatalysts for light-driven proton reduction from water. We show that this method not only simplifies the synthetic procedure for such hybrid materials but also enhances the direct interaction between CQDs and TiO 2 , which facilitates charge transfer from CQDs to TiO 2 and eventually improves its performance for light-driven H 2 generation. To the best of our knowledge, this work represents the system with highest H 2 generation efficiency among all CQD-sensitized materials.

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