Authors :
A. M. Usman; A. Dahiru
Volume/Issue :
Volume 8 - 2023, Issue 4 - April
Google Scholar :
https://bit.ly/3TmGbDi
Scribd :
https://bit.ly/3Il4vBk
DOI :
https://doi.org/10.5281/zenodo.8282574
Abstract :
In this study, a well defined photoactive N,Scodoped ZnO catalyst was synthesized through by a lowtemperature alkali co-precipitation of zinc acetate
dihydrate precursor in presence of ammonium sulfate
as dopants’ source. The catalyst was characterized by Xray diffraction (XRD), scanning electronmicroscopy
(SEM), energy dispersive x-ray (EDX), UV-visible
analysis and FT-IR spectroscopy. The diffraction peaks
of undoped and N,S-codoped lines materials are in
accordance with the wurtzite hexagonal phase of ZnO.
The insertion of the dopants (S and N) and the vigorous
agitation during the catalyst preparation caused a
decrease in the crystallites size. Visible light
photocatalytic studies were carried out using 4-
nitrophenol (4-NP) as pollutant. The effect of
experimental variables for the photocatalytic
degradation such as pH, initial 4-NP concentration,
temperature and catalyst loading was optimized based
on central composite design (CCD) and response surface
methodology. The results indicated that photocatalytic
activity of N,S-codoped ZnO (99.3%) was better than
undoped ZnO (82%), because the band gap of doped was
lower than undoped ZnO photocatalyst which is herein
attributed to shift in the band gap caused by the
dopants.
Keywords :
Photocatalyst, Irradiation, Semiconductor, Degradation, 4-Nitrophenol and N,S-codoped ZnO
In this study, a well defined photoactive N,Scodoped ZnO catalyst was synthesized through by a lowtemperature alkali co-precipitation of zinc acetate
dihydrate precursor in presence of ammonium sulfate
as dopants’ source. The catalyst was characterized by Xray diffraction (XRD), scanning electronmicroscopy
(SEM), energy dispersive x-ray (EDX), UV-visible
analysis and FT-IR spectroscopy. The diffraction peaks
of undoped and N,S-codoped lines materials are in
accordance with the wurtzite hexagonal phase of ZnO.
The insertion of the dopants (S and N) and the vigorous
agitation during the catalyst preparation caused a
decrease in the crystallites size. Visible light
photocatalytic studies were carried out using 4-
nitrophenol (4-NP) as pollutant. The effect of
experimental variables for the photocatalytic
degradation such as pH, initial 4-NP concentration,
temperature and catalyst loading was optimized based
on central composite design (CCD) and response surface
methodology. The results indicated that photocatalytic
activity of N,S-codoped ZnO (99.3%) was better than
undoped ZnO (82%), because the band gap of doped was
lower than undoped ZnO photocatalyst which is herein
attributed to shift in the band gap caused by the
dopants.
Keywords :
Photocatalyst, Irradiation, Semiconductor, Degradation, 4-Nitrophenol and N,S-codoped ZnO
