Show simple item record

AuthorBa-Abbad, Muneer M.
AuthorTakriff, Mohd S.
AuthorBenamor, Abdelbaki
AuthorMohammad, Abdul Wahab
Available date2021-04-22T13:00:30Z
Publication Date2016
Publication NameAdvanced Powder Technology
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.apt.2016.08.009
URIhttp://hdl.handle.net/10576/18325
AbstractThe properties of ZnO nanoparticles were modified by doping them with cobalt ions (Co2+) in various compositions through a sol-gel route. The Co2+-doped ZnO nanoparticles were characterised using X-ray diffraction (XRD), UV/Vis spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and zeta potential measurements. A hexagonal wurtzite-phase structure of Co2+-doped ZnO was observed, with a slight decrease in particle size as the Co2+ doping concentration increased. Absorption by Co2+-doped ZnO was found to shift to longer wavelengths, towards the visible region, which was also confirmed by photoluminescence analysis. The band gap of the Co2+-doped ZnO samples decreased from 3.19 to 2.66 eV as the content of dopant Co2+ increased from 0.0 to 1.0 wt.%. The zeta potential results showed slight effects of Co2+ doping compared with undoped ZnO, indicating that Co2+ doping influences the optical properties and morphology of pure ZnO nanoparticles. The photocatalytic activity of the Co2+-doped ZnO samples was evaluated for the removal of Congo red dye from aqueous solution under solar radiation. The Co2+-doped ZnO samples showed higher effective removal of the dye using the optimal doping of 0.50 wt.%, which produced higher efficiency (about 96%, compared with 80% for pure ZnO).
SponsorThis paper was made possible by a NPRP Grant # [ 5-1425-2-607 ] from the Qatar National Research Fund ? Qatar (a member of Qatar Foundation). The statements made herein are solely the responsibility of the authors. Also, one of the authors (Muneer M. Ba-abbad) is grateful to the Hadhramout University of Science & Technology , Yemen for financial support for his PhD study.
Languageen
PublisherElsevier B.V.
SubjectAzo dyes
Doping (additives)
Electron microscopy
Energy gap
High resolution transmission electron microscopy
Metal nanoparticles
Nanoparticles
Optical properties
Particle size
Phase structure
Scanning electron microscopy
Sol-gel process
Sol-gels
Solutions
Synthesis (chemical)
Transmission electron microscopy
Ultraviolet visible spectroscopy
X ray diffraction
Zeta potential
Zinc sulfide
Doping concentration
Effective removals
Hexagonal wurtzite
Photocatalytic activities
Photoluminescence analysis
UV/ Vis spectroscopy
Zeta potential measurements
ZnO nanoparticles
Zinc oxide
TitleSynthesis and characterisation of Co2+-incorporated ZnO nanoparticles prepared through a sol-gel method
TypeArticle
Pagination2439-2447
Issue Number6
Volume Number27
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record