Asymmetric structure engineering of polymeric carbon nitride for visible-light-driven reduction reactions

被引：57

作者：

Luo, Wei ^{[1
]}

Li, Yongli ^{[1
]}

Wang, Jinshu ^{[1
]}

Liu, Jingchao ^{[1
]}

Zhang, Nan ^{[1
]}

Zhao, Mengdi ^{[1
]}

Wu, Junshu ^{[1
]}

Zhou, Wenyuan ^{[1
]}

Wang, Lianzhou ^{[2
,3
]}

机构：

[1] Beijing Univ Technol, Fac Mat & Manufacture, Key Lab Adv Funct Mat, Beijing 100124, Peoples R China

[2] Univ Queensland, Nanomat Ctr, Sch Chem Engn, St Lucia, Qld 4072, Australia

[3] Univ Queensland, Australian Inst Bioengn & Nanotechnol, St Lucia, Qld 4072, Australia

来源：

NANO ENERGY | 2021年 / 87卷

基金：

中国国家自然科学基金;

关键词：

Gas-solid grafting reaction; Aromatization; Terminal blocking; Asymmetric structure; Photocatalytic reductions; PHOTOCATALYTIC HYDROGEN; EFFICIENT PHOTOCATALYSTS; EXCITON DISSOCIATION; CHARGE SEPARATION; SOLAR HYDROGEN; NITROGEN; DIOXIDE; G-C3N4; WATER; NANOCOMPOSITES;

D O I：

10.1016/j.nanoen.2021.106168

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photocatalytic activity of polymeric carbon nitride (g-C3N4) strongly depends on its electronic structure which is highly sensitive to the preparation methods. To design the photocatalysts with efficient charge separation and transfer property, here we report a new ethylenediamine (EDA) induced gas-solid grafting method which enables the asymmetric modification of g-C3N4 featuring the aromatization at the terminal of melon motifs. The obtained terminal-aromatized g-C3N4 (Ar-C3N4) exhibits an improved visible-light-driven photocatalytic activity in versatile two-electron reduction reactions, outperforming the pristine g-C3N4 by 15.4 and 6.6 folds respectively in hydrogen evolution and hydrogen peroxide production. Theoretical and experimental results demonstrate the intensified asymmetry of p-electron distribution in the resulting material, which provides significantly improved driving force to guide the efficient separation of photogenerated e-h pairs and enhance the charge carrier mobility compared to its symmetric counterpart.

引用

页数：10

共 63 条

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