4.7 Article

Defect-rich selenium doped graphitic carbon nitride for high-efficiency hydrogen evolution photocatalysis

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 81, 页码 31590-31598

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2023.04.319

关键词

Graphitic carbon nitride; Photocatalytic hydrogen evolution; Selenium doping; Nitrogen vacancies

向作者/读者索取更多资源

In this study, a co-functionalized g-C3N4 system was developed by Se doping and nitrogen vacancies modification, which effectively improved the photocatalytic activity of graphitic carbon nitride. The synergistic effect of Se dopants and nitrogen defects suppressed charge trapping and recombination, leading to enhanced charge separation/transportation efficiency.
Graphitic carbon nitride (g-C3N4) has been demonstrated as a promising non-metal material for photocatalytic hydrogen evolution (PHE), while its photocatalytic activity is greatly limited due to the narrow visible light response-ability and the intrinsic severe charge deep trapping and recombination effects. Herein, a co-functionalized g-C3N4 system by Se doping and nitrogen vacancies modification is developed through a Se vapor assisted-chemical vapor deposition synthetic strategy. Advanced characterization results revealed that Se dopants promote the visible-light absorption ability of g-C3N4, while nitrogen defects-induced shallow trap states are constructive to improving charge separation/transportation efficiency by effectively retarding the detrimental charge deep trapping and recombination. As a result, the synergistic effect of the Se dopants and nitrogen defects leads to a highly efficient PHE performance of g-C3N4. The integrated engineering strategy and mechanism understanding provided in this work may offer new insights into developing other novel photocatalysts for various applications.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据