期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 481, 期 -, 页码 13-19出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2016.07.037
关键词
Photocatalytic properties; Visible-light response; Oxygen vacancies; Graphene quantum dots; SnO2
资金
- National Nature Science Foundation of China [51172109]
- Fundamental Research Funds for the Central Universities [NS2014057]
- Open Research Fund of Jiangsu Provincial Key Laboratory for Nanotechnology of Nanjing University
- Qing Lan Project
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Quasi-noble-metal graphene quantum dots (GQDs) deposited stannic oxide (SnO2) with oxygen vacancies (VOs) were prepared by simply sintering SnO2 and citric acid (CA) together. The redox process between SnO2 and GQDs shows the formation of oxygen vacancy states below the conduction band of stannic oxide. The produced VOs obviously extend the optical absorption region of SnO2 to the visible-light region. Meanwhile, GQDs can effectively improve the charge-separation efficiency via a quasi function like noble metal and promote the visible-light response to some degree. In addition, the samples calcinated at 450 degrees C reveals the best performance because of its relatively high concentrations of VOs. What is more, the possible degradation mechanism has been inferred as extended visible-light response as well as raised charge-separation efficiency has also been put forward. Our work may offer a simple strategy to combine the defect modulation and noble metal deposition simultaneously for efficient photocatalysis. (C) 2016 Elsevier Inc. 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。
推荐
暂无数据