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Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles

Strontium-doped zinc oxide nanoparticles (Zn1-xSrxO NPs; x=0, 0.02, 0.04, and 0.06) were synthesized by a sol-gel method. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images showed NPs with nearly spherical shapes, with sizes from 27 to 41 nm for high Sr concentratio...

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Main Authors: Yousefi, R., Jamali-Sheini, F., Cheraghizade, M., Khosravi-Gandomani, S., Sáaedi, A., Huang, N.M., Basirun, Wan Jefrey, Azarang, M.
Format: Article
Published: Elsevier 2015
Subjects:
Q Science (General)
QC Physics
QD Chemistry
Online Access:http://eprints.um.edu.my/19342/
http://dx.doi.org/10.1016/j.mssp.2015.01.013
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spelling my.um.eprints.193422019-01-31T07:31:35Z http://eprints.um.edu.my/19342/ Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles Yousefi, R. Jamali-Sheini, F. Cheraghizade, M. Khosravi-Gandomani, S. Sáaedi, A. Huang, N.M. Basirun, Wan Jefrey Azarang, M. Q Science (General) QC Physics QD Chemistry Strontium-doped zinc oxide nanoparticles (Zn1-xSrxO NPs; x=0, 0.02, 0.04, and 0.06) were synthesized by a sol-gel method. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images showed NPs with nearly spherical shapes, with sizes from 27 to 41 nm for high Sr concentration and undoped ZnO NPs, respectively. X-ray diffraction (XRD) patterns, selected area electron diffraction (SAED) patterns, and Raman spectra indicated that the undoped and Sr-doped ZnO NPs were crystallized in a hexagonal wurtzite structure. However, the Raman results revealed a decrease in the crystalline quality with an increase in the Sr concentration in the ZnO structure. Evidence of dopant incorporation is demonstrated by X-ray photoelectron spectroscopy (XPS) of the Sr-doped ZnO NPs. From the results of optical characterizations, the band-gap values of the Zn0.98Sr0.02O and Zn0.96Sr0.04O NPs decreased, while the band-gap value of the Zn0.94Sr0.06O NPs increased in comparison to the band-gap value of the undoped ZnO NPs. Finally, the obtained NPs were used as a photocatalyst to remove methylene blue (MB). Observations showed that the efficiency of the photocatalyst activity of the ZnO NPs was significantly increased by increasing the Sr, but until an optimum concentration. Elsevier 2015 Article PeerReviewed Yousefi, R. and Jamali-Sheini, F. and Cheraghizade, M. and Khosravi-Gandomani, S. and Sáaedi, A. and Huang, N.M. and Basirun, Wan Jefrey and Azarang, M. (2015) Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles. Materials Science in Semiconductor Processing, 32. pp. 152-159. ISSN 1369-8001 http://dx.doi.org/10.1016/j.mssp.2015.01.013 doi:10.1016/j.mssp.2015.01.013
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic Q Science (General)
QC Physics
QD Chemistry
spellingShingle Q Science (General)
QC Physics
QD Chemistry
Yousefi, R.
Jamali-Sheini, F.
Cheraghizade, M.
Khosravi-Gandomani, S.
Sáaedi, A.
Huang, N.M.
Basirun, Wan Jefrey
Azarang, M.
Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
description Strontium-doped zinc oxide nanoparticles (Zn1-xSrxO NPs; x=0, 0.02, 0.04, and 0.06) were synthesized by a sol-gel method. Transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images showed NPs with nearly spherical shapes, with sizes from 27 to 41 nm for high Sr concentration and undoped ZnO NPs, respectively. X-ray diffraction (XRD) patterns, selected area electron diffraction (SAED) patterns, and Raman spectra indicated that the undoped and Sr-doped ZnO NPs were crystallized in a hexagonal wurtzite structure. However, the Raman results revealed a decrease in the crystalline quality with an increase in the Sr concentration in the ZnO structure. Evidence of dopant incorporation is demonstrated by X-ray photoelectron spectroscopy (XPS) of the Sr-doped ZnO NPs. From the results of optical characterizations, the band-gap values of the Zn0.98Sr0.02O and Zn0.96Sr0.04O NPs decreased, while the band-gap value of the Zn0.94Sr0.06O NPs increased in comparison to the band-gap value of the undoped ZnO NPs. Finally, the obtained NPs were used as a photocatalyst to remove methylene blue (MB). Observations showed that the efficiency of the photocatalyst activity of the ZnO NPs was significantly increased by increasing the Sr, but until an optimum concentration.
format Article
author Yousefi, R.
Jamali-Sheini, F.
Cheraghizade, M.
Khosravi-Gandomani, S.
Sáaedi, A.
Huang, N.M.
Basirun, Wan Jefrey
Azarang, M.
author_facet Yousefi, R.
Jamali-Sheini, F.
Cheraghizade, M.
Khosravi-Gandomani, S.
Sáaedi, A.
Huang, N.M.
Basirun, Wan Jefrey
Azarang, M.
author_sort Yousefi, R.
title Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
title_short Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
title_full Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
title_fullStr Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
title_full_unstemmed Enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
title_sort enhanced visible-light photocatalytic activity of strontium-doped zinc oxide nanoparticles
publisher Elsevier
publishDate 2015
url http://eprints.um.edu.my/19342/
http://dx.doi.org/10.1016/j.mssp.2015.01.013
_version_ 1643690959490252800
score 13.211869

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