globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2020.08.022
论文题名:
Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions
作者: Xiao Y.; Guo S.; Tian G.; Jiang B.; Ren Z.; Tian C.; Li W.; Fu H.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:3
起始页码: 275
结束页码: 283
语种: 英语
中文关键词: Carbon nitride ; Heterojunction ; Holey 2D nanomaterials ; Photocatalytic hydrogen evolution ; TiO2
英文关键词: Heterojunctions ; Hydrogen production ; Nanocrystals ; Oxide minerals ; Reaction kinetics ; Separation ; Titanium dioxide ; Carrier separation ; Charge separations ; Clean energy ; Hydrogen production rate ; Interfacial contact ; Photocatalytic hydrogen evolution ; Porous structures ; TiO2 nanocrystals ; Surface reactions
英文摘要: Efficient charge separation and rapid interfacial reaction kinetics are crucial factors that determine the efficiency of photocatalytic hydrogen evolution. Herein, a fascinating 2D heterojunction photocatalyst with superior photocatalytic hydrogen evolution performance – holey C3N4 nanosheets nested with TiO2 nanocrystals (denoted as HCN/TiO2) – is designed and fabricated via an in situ exfoliation and conversion strategy. The HCN/TiO2 is found to exhibit an ultrathin 2D heteroarchitecture with intimate interfacial contact, highly porous structures and ultrasmall TiO2 nanocrystals, leading to drastically improved charge carrier separation, maximized active sites and the promotion of mass transport for photocatalysis. Consequently, the HCN/TiO2 delivers an impressive hydrogen production rate of 282.3 μmol h−1 per 10 mg under AM 1.5 illumination and an apparent quantum efficiency of 13.4% at a wavelength of 420 nm due to the synergetic enhancement of surface reactions and charge separation. The present work provides a promising strategy for developing high-performance 2D heterojunctions for clean energy applications. © 2020 Science China Press
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170455
Appears in Collections:气候变化与战略

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作者单位: Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education of the People's Republic of China, Heilongjiang University, Harbin, 150080, China; College of Chemistry and Chemical Engineering, Jiangxi Inorganic Membrane Materials Engineering Research Centre, Jiangxi Normal University, Nanchang, 330022, China; Department of Chemistry, Laboratory of Advanced Materials, Fudan University, Shanghai, 200433, China

Recommended Citation:
Xiao Y.,Guo S.,Tian G.,et al. Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions[J]. Science Bulletin,2021-01-01,66(3)
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