Accumulation of localized charge on the surface of polymeric carbon nitride boosts the photocatalytic activity

Yabin Jiang ¹Lei Zeng ²Chi Cao ³Wensheng Yang ⁴Limin Huang²

扫码查看

作者信息

1. School of Materials,Sun Yat-Sen University,Shenzhen 518107,China;Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China
2. Department of Chemistry,Southern University of Science and Technology,Shenzhen,Guangdong 518055,China
3. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,College of Chemistry,Jilin University,Changchun 130012,China
4. Institute of Molecular Plus,Tianjin University,Tianjin 300072,China
折叠

Abstract

The random mobility of charge carriers is a main factor causing the low photocatalytic efficiency of g-C3N4.Thus,the controllable migration of charge carriers is a rational strategy to suppress the charge recombination and facilitate charge separation.Herein,an ethylenediamine modified g-C3N4 displays im-proved photocatalytic activity.The excellent charge separation efficiency is confirmed to be a key factor for the enhancement.The TEM observation after photo-depositing Pt nanoparticles and DFT calculations verify the accumulation of electrons on some areas of g-C3N4 surface.The increased-NH2 groups signifi-cantly tune the electronic structure of g-C3N4 after the modification.The generation of midgap states also affects the charge separation.Our reports provide a simple method to manage the migration of charge carriers and enable electrons directional transfer,which suppresses the recombination and improves the photocatalytic activity.

Key words

g-C3N4/Charge separation/Photocatalytic H2 evolution/Directional migration

引用本文复制引用

基金项目

Shenzhen Key Laboratory of Solid State Batteries(ZDSYS20180208184346531)

Guangdong Provin-cial Key Laboratory of Energy Materials for Electric Power(2018B030322001)

Guangdong Provincial Key Laboratory of Catal-ysis(2020B121201002)

Shenzhen Clean Energy Research In-stitute(CERI-KY-2019-003)

国家自然科学基金(2017M611446)

Core Re-search Facilities at SUSTech that receives support from a Presiden-tial fund()

Development and Reform Commission of Shen-zhen Municipality()

出版年

2022

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

参考文献量35

段落导航