Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 203, Issue -, Pages 917-926Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.10.086
Keywords
Visible light photocatalysis; Cu2O/Cu/AgBr/Ag; Photodegradation stability; Z-scheme mechanism
Funding
- National Basic Research Program of China (973 Program) [2014CB931703]
- National Natural Science Foundation of China [51571123, 51101088, 51171082, 11304161, 51671108]
- Tianjin Natural Science Foundation [13JCQNJC02800, 13JCYBJC41100, 14JCZDJC37700]
Ask authors/readers for more resources
A series of Cu2O/CulAgBriAg photocatalysts were synthesized by a redox procedure followed by photo assisted deposition. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were utilized to characterize the structure of the system. It is found that Cu nanoparticles (NPs) could be controllable to grow in between Cu2O and AgBr. Without Cu NPs between Cu2O/AgBr, under visible light irradiation for 50 min, only a low photocatalytic degradation of methyl orange (MO) (similar to 51%) was observed compared with the high MO photodegradation (similar to 98%) in the presence of Cu NPs. Furthermore, introducing Cu NPs assists in accelerating excited carrier transfer at the interface between Cu2O and AgBr, measured by the photoluminescence spectra, photocurrent and electrochemical impedance spectra, which thus helps to increase the stability of the photocatalyst. The increased photocatalytic activity and stability can be attributed to the favorable band alignment between Cu2O and AgBr mediated by Cu NPs, which is known as the Z-scheme mechanism and confirmed by the detection of the active species. These results demonstrate that the Cu2O/CujAgBr/Ag is a potential visible light photocatalyst for pollutants degradation. (C) 2016 Elsevier B.V. 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