期刊
CHEMICAL ENGINEERING JOURNAL
卷 369, 期 -, 页码 263-271出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.03.095
关键词
Graphitic carbon nitride; N-vacancy; Hydrogen evolution from water; Visible-light photocatalyst
资金
- National Natural Science Foundation of China [21333006, 21573135, 51602179]
- Taishan Scholars Program of Shandong Province
- ZYW Young Scholars Program of Shandong University [2015WLJH35]
- Fundamental Research Funds of Shandong University [2018JC039]
We developed a new method to introduce N-vacancies of graphitic carbon nitride (GCN, typically in the Melon structure) at the inter-triazine sites and investigated how the visible-light photocatalytic H-2 evolution of GCN is affected by the N-vacancies at the intra- and inter-triazine sites of GCN. Theoretical and experimental results show that these N-vacancies of GCN create singly-occupied defect states within the band gap acing as a trap for photogenerated electrons and act as the reaction sites for H+ reduction. Compared with the intra-triazine N-vacancy, the inter-triazine N-vacancy exhibits stronger electron localization leading to a more efficient H-2 evolution. The photocatalytic reaction rate of GCN with inter-triazine N-vacancies is 9 times higher than that of defect free GCN, and 2.2 times higher normalized reaction rates than GCN with intra-triazine N-vacancies. The catalysis mechanism and the method to prepare melon with inter-triazine N-vacancies can be extended to explore new photocatalysts with high activities.
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。
推荐
暂无数据