Effect of oxygen-doped C3N4 on the separation capability of the photoinduced electron-hole pairs generated by O-C3N4@TiO2 with quasi-shell-core nanostructure

被引：87

作者：

Bu, Yuyu ^{[1
]}

Chen, Zhuoyuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2014年 / 144卷

基金：

中国国家自然科学基金;

关键词：

Oxygen doping C3N4; O-C3N4@TiO2 quasi-shell-core nanocomposite; Interface bond; Electron transfer channel; GRAPHITIC CARBON NITRIDE; HYDROGEN-PRODUCTION; WATER; PHOTOCATALYST; EVOLUTION; POLYMER; DYES;

D O I：

10.1016/j.electacta.2014.08.095

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

In this work, the oxygen-doped C3N4@TiO2 (O-C3N4@TiO2) composites with quasi-shell-core nanostructure were fabricated by coating a monolayer or multilayers of O-C3N4 onto the surface of TiO2 nanoparticles. Compared with the C3N4@TiO2 quasi-shell-core nanocomposite, the O-C3N4@TiO2 quasi-shell-core nanocomposite exhibits a significant promotion of the photoelectrochemical and photocatalytic performance of TiO2, owing to the interfacial chemical bonds formed between the hydroxyl residues on TiO2 surface and the oxidizing groups on O-C3N4 surface induced by oxygen doping. The experimental results of UV/Vis diffuse reflectance spectroscopy, electrochemical impedance spectroscopy, photoluminescence spectroscopy and excited state electron attenuation spectroscopy further reveal that this interfacial chemical bonds formed between O-C3N4 and TiO2 can become effective transfer channels for the photogenerated electrons, help to capture the electrons from the valence band of O-C3N4 and rapidly quench the photogenerated holes of TiO2, thereby effectively reducing the recombination efficiency of the photogenerated electrons and holes. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：42 / 49

页数：8

共 31 条

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