Staff View: Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)

Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)

Pure and Ag doped ZnO nanoparticles were synthesized on microscopic sand particles by sol-gel method. Silver nitrate was used as the doping precursor, Ag doping levels of 1.3 to 7.7 of Ag/Zn ratios were obtained based on energy dispersive X-ray spectroscopy analysis. X-ray diffraction results show t...

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Main Authors:	Safian, Nur Azmina Mohamed, Nor, R.M., Rafaie, Hartini Ahmad, Abdul Sani, Siti Fairus, Osman, Zurina
Format:	Article
Published:	Malaysian Analytical Sciences Society 2018
Subjects:	Q Science (General) QC Physics
Online Access:	http://eprints.um.edu.my/21093/ https://doi.org/10.17576/mjas-2018-2202-12
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spelling	my.um.eprints.210932019-04-30T01:28:12Z http://eprints.um.edu.my/21093/ Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro) Safian, Nur Azmina Mohamed Nor, R.M. Rafaie, Hartini Ahmad Abdul Sani, Siti Fairus Osman, Zurina Q Science (General) QC Physics Pure and Ag doped ZnO nanoparticles were synthesized on microscopic sand particles by sol-gel method. Silver nitrate was used as the doping precursor, Ag doping levels of 1.3 to 7.7 of Ag/Zn ratios were obtained based on energy dispersive X-ray spectroscopy analysis. X-ray diffraction results show that a ZnO (101) peak of Ag doped samples are shifted towards lower degree which around 0.17o compared to pure ZnO NPs, indicating the existence of doping in the Ag doped samples. The pure and Ag doped ZnO samples were used as photocatalysts in the degradation of methylene blue under UV irradiation. Photodegradation efficiency based on the pseudo-first kinetics model gave measured values of the photodegradation rate, k of 8.9, 11.8, 12.7, 14.8 and 17.4 x 10-3 min-1 for pure, 1.3, 1.6, 1.7 and 2.4 of Ag/Zn ratios, respectively. At higher doping levels of 3.3 and 7.7 of Ag/Zn ratios, the k values receded to 12.7 and 12.0 x 10-3 min-1, respectively. The increasing trend on k values can be due to the doping defect levels which trapped the recombining electrons, thus lengthening the lifetime of the electron hole pairs. Malaysian Analytical Sciences Society 2018 Article PeerReviewed Safian, Nur Azmina Mohamed and Nor, R.M. and Rafaie, Hartini Ahmad and Abdul Sani, Siti Fairus and Osman, Zurina (2018) Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro). Malaysian Journal of Analytical Science, 22 (2). pp. 270-278. ISSN 1394-2506 https://doi.org/10.17576/mjas-2018-2202-12 doi:10.17576/mjas-2018-2202-12
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
spellingShingle	Q Science (General) QC Physics Safian, Nur Azmina Mohamed Nor, R.M. Rafaie, Hartini Ahmad Abdul Sani, Siti Fairus Osman, Zurina Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
description	Pure and Ag doped ZnO nanoparticles were synthesized on microscopic sand particles by sol-gel method. Silver nitrate was used as the doping precursor, Ag doping levels of 1.3 to 7.7 of Ag/Zn ratios were obtained based on energy dispersive X-ray spectroscopy analysis. X-ray diffraction results show that a ZnO (101) peak of Ag doped samples are shifted towards lower degree which around 0.17o compared to pure ZnO NPs, indicating the existence of doping in the Ag doped samples. The pure and Ag doped ZnO samples were used as photocatalysts in the degradation of methylene blue under UV irradiation. Photodegradation efficiency based on the pseudo-first kinetics model gave measured values of the photodegradation rate, k of 8.9, 11.8, 12.7, 14.8 and 17.4 x 10-3 min-1 for pure, 1.3, 1.6, 1.7 and 2.4 of Ag/Zn ratios, respectively. At higher doping levels of 3.3 and 7.7 of Ag/Zn ratios, the k values receded to 12.7 and 12.0 x 10-3 min-1, respectively. The increasing trend on k values can be due to the doping defect levels which trapped the recombining electrons, thus lengthening the lifetime of the electron hole pairs.
format	Article
author	Safian, Nur Azmina Mohamed Nor, R.M. Rafaie, Hartini Ahmad Abdul Sani, Siti Fairus Osman, Zurina
author_facet	Safian, Nur Azmina Mohamed Nor, R.M. Rafaie, Hartini Ahmad Abdul Sani, Siti Fairus Osman, Zurina
author_sort	Safian, Nur Azmina Mohamed
title	Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
title_short	Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
title_full	Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
title_fullStr	Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
title_full_unstemmed	Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
title_sort	photocatalytic degradation of methylene blue with silver doped zno nanoparticles grown on microscopic sand particles (degradasi metilena biru menggunakan nanopartikel zno sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)
publisher	Malaysian Analytical Sciences Society
publishDate	2018
url	http://eprints.um.edu.my/21093/ https://doi.org/10.17576/mjas-2018-2202-12
_version_	1643691464179318784
score	13.211869

Photocatalytic degradation of methylene blue with silver doped ZnO nanoparticles grown on microscopic sand particles (Degradasi metilena biru menggunakan nanopartikel ZnO sebagai fotomangkin yang didopkan dengan perak tumbuh di atas pasir bersaiz mikro)

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