High visible light photocatalytic activities obtained by integrating g-C3N4 with ferroelectric PbTiO3

Tingting Xu ¹Ping Niu ²Shulan Wang ³Li Li⁴

扫码查看

作者信息

1. Department of Chemistry, School of Science, Northeastern University, Shenyang, 110819, China;State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China;School of Metallurgy, Northeastern University, Shenyang, 110819, China
2. School of Metallurgy, Northeastern University, Shenyang, 110819, China
3. Department of Chemistry, School of Science, Northeastern University, Shenyang, 110819, China
4. State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, Liaoning, China;School of Metallurgy, Northeastern University, Shenyang, 110819, China
折叠

Abstract

Graphitic carbon nitride (g-C3 N4) with the merits of high visible light absorption,proper electronic band structure with high conduction band edge and variable modulation,is viewed as a promising photocatalyst for practical use.To alleviate its high recombination rate of photo-excited charge carriers and maximize the photocatalytic performances,it is paramount to design highly effective transfer channels for photo-excited charge carriers.Ferroelectric materials can have the charge carriers transport in opposite directions owing to the internal spontaneous polarization,which may be suitable for constructing the heterostructure with g-C3N4 for efficient charge separation.Inspired by this concept,herein ferroelec tric PbTiO3,which can be the visible-light absorber,is coupled with g-C3N4 to construct PbTiO3/g-C3N4 heterostructure with close contact via Pb-N bond by the facile post thermal treatment.The optimized PbTiO3/g-C3N4 heterostructure exhibited excellent photocatalytic and photoelectrochemical activities under visible light irradiation.Moreover,the simultaneous application of ultrasound-induced mechanical waves can further improve its photocatalytic activities through reinforcing the built-in piezoelectric field.This work proposes a widely applicable strategy for the fabrication of high-performance ferroelectric based photocatalysts and also provides some new ideas for developing the understanding of ferroelectric photocatalysis.

Key words

Photocatalysis/Ferroelectric/Piezoelectric/Carbon nitride/Lead titanate

引用本文复制引用

基金项目

This work is supported by the National Natural Science Foundation of China(51904059)

This work is supported by the National Natural Science Foundation of China(51574062)

This work is supported by the National Natural Science Foundation of China(51902045)

Fundamental Research Funds for the Central Universities(N182505036)

Fundamental Research Funds for the Central Universities(N182503030)

Fundamental Research Funds for the Central Universities(N2002005)

LiaoNing Revitalization Talents Program(XLYC1807123)

出版年

2021

材料科学技术(英文版)

中国金属学会中国材料研究学会中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI

影响因子：0.657

ISSN：1005-0302

被引量2

参考文献量58

段落导航