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Nano Research

Article Title

High activity of hot electrons from bulk 3D graphene materials for efficient photocatalytic hydrogen production

Authors

Yanhong Lu, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Chemistry & Material Science, Langfang Teachers University, Langfang 065000, China
Bo Ma, School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Yang Yang, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Erwei Huang, School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Zhen Ge, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Tengfei Zhang, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Suling Zhang, School of Chemistry & Material Science, Langfang Teachers University, Langfang 065000, China
Landong Li, School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Naijia Guan, School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Yanfeng Ma, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China
Yongsheng Chen, State Key Laboratory and Institute of Elemento-Organic Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Key Laboratory of Functional Polymer Materials and the Centre of Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China School of Material Science and Engineering & National Institute for Advanced Materials, Nankai University, Tianjin 300350, China

Keywords

graphene, hot electron, hydrogen production, water splitting, TiO2

Abstract

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·g−1 cat 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·g−1 cat 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.

Graphical Abstract

Publisher

Tsinghua University Press

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