Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 552, Issue -, Pages 678-688Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2019.05.104
Keywords
Hydrogen bond; Interfacial electric fields; 2D/2D Z-scheme; Photocatalytic degradation
Categories
Funding
- Fundamental Research Funds for the Central Universities [2018B43614]
- National Science Funds for Creative Research Groups of China [51421006]
- Characteristic Development Guidance Funds for the Central Universities
- National Natural Science Foundation of China [51879228]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
Ask authors/readers for more resources
2D/2D materials have attracted extensive attention in the field of photocatalysis due to their large contact surfaces and short charge transfer distances. However, 2D/2D heterojunction materials, especially those that connect different materials together using strong chemical bonds, are still challenging to prepare. Herein, a novel hydrogen bond-assisted 2D/2D Z-scheme SnNb2O6/Bi2WO6 system was successfully prepared using a facile hydrothermal method. The 2D/2D Z-scheme system increases the accessible area for charges and constructs interfacial electric fields, thereby reducing the barriers for electron transport and enhancing the photocatalytic activity. In addition, the electronic coupling of the surface hydrogen bonds can further enhance the interfacial electric fields, which offers a new route for lowering the interfacial potential barrier of the system. As expected, the hydrogen bond-assisted 2D/2D Z-scheme SnNb2O6/Bi2WO6 system results in an outstanding improvement of the norfioxacin (NOR) photodegradation efficiency, and the degradation rate constant (4.06 x 10(-2) min(-1) ) is 9 and 2 times higher than those of SnNb2O6 (4.33 x 10(-3) min(-1)), and Bi2WO6 (1.70 x 10(-2) min(-1)), respectively. Simultaneously, three differently degradation pathways for the degradation of NOR were proposed based on the degradation products that were identified. Finally, a fast charge transfer mechanism of the hydrogen bonds that are connected to the 2D/2D Z-scheme SnNb2O6/Bi2WO6 system is proposed, which is based on the ESR analysis and the DFT calculations. (C) 2019 Elsevier Inc. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available