期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 193, 期 -, 页码 103-109出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.04.017
关键词
Carbon nitride; Graphene quantum dots; Hydrogen evolution; Metal-free; Photocatalysis
资金
- NSF of China [51238002, 51272099, 51378246, 20801026]
- NSF of Jiangxi Province [KJLD12002, 20133ACB21001, 20122BCB23013, 20114BAB203005]
- Foundation of State Key Laboratory of Structural Chemistry [20100015]
- US Department of Energy, Office of Basic Energy Sciences, Divisions of Chemical Sciences, Geochemical Sciences, and Biological Sciences [DE-FG02-86ER13622.A000]
In this work, we report a systematic study of the relationship between photocatalytic properties of hydrogen evolution and structures and morphologies of g-C3N4 prepared by different precursors (urea, melamine and dicyandiamide). The photocatalytic performances of H-2 production are affected by the method and degree of polymerization, the degree of protonation, and the morphology of g-C3N4 prepared by different precursors. Furthermore, a novel metal-free N-GQDs/g-C3N4 catalyst was designed and synthesized, which shows much better photocatalytic activity for H-2 evolution from water splitting than that of g-C3N4 due to the unique and multiple roles of N-GQDs. A mechanism is put forth to explain the roles of N-GQDs and the detailed enhancement of photocatalytic performance of the N-GQDs/g-C3N4. (C) 2016 Elsevier B.V. All rights reserved.
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