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Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes

Using sol-gel method, nano crystalline ZnO particles doped with different concentrations of molybdenum (Mo) and manganese (Mn) (0.2-1.0%) were synthesized. The structural and optical properties were studied with standard analytical techniques such as scanning electron microscopy (SEM), X-ray diffrac...

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Main Authors:	Umar, Khalid, Aris, Azmi, Parveen, Tabassum, Jaafar, Jafariah, Abdul Majid, Zaiton, Vijaya Bhaskar Reddy, Ambavaram, Talib, Juhaizah
Format:	Article
Published:	Elsevier B.V. 2015
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/58872/ http://dx.doi.org/10.1016/j.apcata.2015.02.001
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spelling	my.utm.588722021-09-09T02:42:27Z http://eprints.utm.my/id/eprint/58872/ Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes Umar, Khalid Aris, Azmi Parveen, Tabassum Jaafar, Jafariah Abdul Majid, Zaiton Vijaya Bhaskar Reddy, Ambavaram Talib, Juhaizah TA Engineering (General). Civil engineering (General) Using sol-gel method, nano crystalline ZnO particles doped with different concentrations of molybdenum (Mo) and manganese (Mn) (0.2-1.0%) were synthesized. The structural and optical properties were studied with standard analytical techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-vis spectroscopy. The crystalline nature of undoped and doped ZnO is indicated by XRD analysis. The SEM images of undoped ZnO showed irregular shape while doped ZnO showed fused supramolecular structure with rough surfaces. The photocatalytic activity of the synthesized particles (ZnO doped with Mo and Mn) was tested by studying the decolorization of two different chromophoric dyes namely Direct Yellow 27 (azo dye) and Acid Blue 129 (anthraquinone dye) with a 500 W halogen linear lamp in the presence of atmospheric oxygen as a function of irradiation time. The results indicate that ZnO with dopant concentration of 0.60% Mo and 0.80% Mn showed the highest photocatalytic activity as compared to the other dopant concentrations for the decolorization of both dyes. In the case of azo dye, 84% decolorization was found while in case of anthraquinone dye, 66% decolorization took place using 0.60% Mo in 390 min. Elsevier B.V. 2015-09-25 Article PeerReviewed Umar, Khalid and Aris, Azmi and Parveen, Tabassum and Jaafar, Jafariah and Abdul Majid, Zaiton and Vijaya Bhaskar Reddy, Ambavaram and Talib, Juhaizah (2015) Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes. Applied Catalysis A: General, 505 . pp. 507-514. ISSN 0926-860X http://dx.doi.org/10.1016/j.apcata.2015.02.001 DOI:10.1016/j.apcata.2015.02.001
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Umar, Khalid Aris, Azmi Parveen, Tabassum Jaafar, Jafariah Abdul Majid, Zaiton Vijaya Bhaskar Reddy, Ambavaram Talib, Juhaizah Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
description	Using sol-gel method, nano crystalline ZnO particles doped with different concentrations of molybdenum (Mo) and manganese (Mn) (0.2-1.0%) were synthesized. The structural and optical properties were studied with standard analytical techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD) and UV-vis spectroscopy. The crystalline nature of undoped and doped ZnO is indicated by XRD analysis. The SEM images of undoped ZnO showed irregular shape while doped ZnO showed fused supramolecular structure with rough surfaces. The photocatalytic activity of the synthesized particles (ZnO doped with Mo and Mn) was tested by studying the decolorization of two different chromophoric dyes namely Direct Yellow 27 (azo dye) and Acid Blue 129 (anthraquinone dye) with a 500 W halogen linear lamp in the presence of atmospheric oxygen as a function of irradiation time. The results indicate that ZnO with dopant concentration of 0.60% Mo and 0.80% Mn showed the highest photocatalytic activity as compared to the other dopant concentrations for the decolorization of both dyes. In the case of azo dye, 84% decolorization was found while in case of anthraquinone dye, 66% decolorization took place using 0.60% Mo in 390 min.
format	Article
author	Umar, Khalid Aris, Azmi Parveen, Tabassum Jaafar, Jafariah Abdul Majid, Zaiton Vijaya Bhaskar Reddy, Ambavaram Talib, Juhaizah
author_facet	Umar, Khalid Aris, Azmi Parveen, Tabassum Jaafar, Jafariah Abdul Majid, Zaiton Vijaya Bhaskar Reddy, Ambavaram Talib, Juhaizah
author_sort	Umar, Khalid
title	Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
title_short	Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
title_full	Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
title_fullStr	Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
title_full_unstemmed	Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes
title_sort	synthesis, characterization of mo and mn doped zno and their photocatalytic activity for the decolorization of two different chromophoric dyes
publisher	Elsevier B.V.
publishDate	2015
url	http://eprints.utm.my/id/eprint/58872/ http://dx.doi.org/10.1016/j.apcata.2015.02.001
_version_	1712285045554675712
score	13.211869

Synthesis, characterization of Mo and Mn doped ZnO and their photocatalytic activity for the decolorization of two different chromophoric dyes

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