Journal
APPLIED SURFACE SCIENCE
Volume 347, Issue -, Pages 719-726Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2015.04.164
Keywords
Methylene Blue; Solar photocatalysis; Semiconductor; Bismuth vanadate; Aurivillius-type structure; Optical properties
Categories
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Science, ICT & Future Planning [NRF-2013RA1A2009154]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), China
Ask authors/readers for more resources
Aurivillius-type photocatalyst of Bi4V2O11 nanoparticles with an average particle size of 45 nm was prepared by the modified Pechini method. The sample was investigated by X-ray powder diffraction (XRD) and the structural refinement. The nanoparticles were characterized by scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray photoelectron spectroscopic (XPS) and UV-vis absorption spectrum. Bi4V2O11 nanoparticles show an efficient absorption in the UV-vis light wavelength region with a narrowed band gap energy of 2.08 eV and an indirect allowed electronic transition. The photocatalytic activities of Bi4V2O11 nanoparticles were evaluated by photodegradation of methylene blue (MB) under visible-light irradiation in air atmosphere. These results indicate that Bi4V2O11 could be a potential photocatalyst driven by visible-light. Hybridization of the 6s and 6p orbitals of Bi3+ and the resulting lone electron pair yields interesting properties. The effective photocatalytic activity was discussed on the base of the crystal structure characteristic such as polar (VO3.5LI0.5)(2)- anionic groups, Aurivillius-type (Bi2O2)(2+) layers and long distance of the nearest V-V in the lattices, etc. (C) 2015 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