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High activity of hot electrons from bulk 3D graphene materials for efficient photocatalytic hydrogen production
Landong Li2(
), Yongsheng Chen1,2 
()
), Yongsheng Chen1,2 ()Abstract
Design and synthesis of efficient photocatalysts for hydrogen production via water splitting are of great importance from both theoretical and practical viewpoints. Many metal-based semiconductors have been explored for this purpose in recent decades. Here, for the first time, an entirely carbon-based material, bulk three-dimensionally cross-linked graphene (3DG), has been developed as a photocatalyst for hydrogen production. It exhibits a remarkable hydrogen production rate of 270 μmol·h−1·gcat−1 under full-spectrum light via a hot/free electron emission mechanism. Furthermore, when combined with the widely used semiconductor TiO2 to form a TiO2/3DG composite, it appears to become a more efficient hydrogen production photocatalyst. The composite achieves a production rate of 1, 205 μmol·h−1·gcat−1 under ultraviolet–visible (UV–vis) light and a 7.2% apparent quantum efficiency at 350 nm due to the strong synergetic effects between TiO2 and 3DG.
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Pages 1662-1672
Cite this article:
Lu Y, Ma B, Yang Y, et al. High activity of hot electrons from bulk 3D graphene materials for efficient photocatalytic hydrogen production. Nano Research, 2017, 10(5): 1662-1672. https://doi.org/10.1007/s12274-016-1390-5
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