气候变化领域集成服务门户(CCPortal): Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions

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DOI	10.1016/j.scib.2020.08.022
	Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions
	Xiao Y.; Guo S.; Tian G.; Jiang B.; Ren Z.; Tian C.; Li W.; Fu H.
发表日期	2021
ISSN	20959273
起始页码	275
结束页码	283
卷号	66 期号:3
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
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
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207621
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
推荐引用方式 GB/T 7714	Xiao Y.,Guo S.,Tian G.,et al. Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions[J],2021,66(3).
APA	Xiao Y..,Guo S..,Tian G..,Jiang B..,Ren Z..,...&Fu H..(2021).Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions.Science Bulletin,66(3).
MLA	Xiao Y.,et al."Synergetic enhancement of surface reactions and charge separation over holey C3N4/TiO2 2D heterojunctions".Science Bulletin 66.3(2021).