Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition

Advanced oxidation process based on semiconductor photocatalysts is an emerging technique for wastewater treatment. However, the lifetime of these semiconductor photocatalysts is yet to be fully studied. After heavy metal removal, most active sites of catalyst are blocked by heavy metal. Therefore,...

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Main Author:	Le, Anh Thi
Format:	Thesis
Language:	English
Published:	2018
Subjects:	T Technology
Online Access:	http://eprints.usm.my/56062/1/Reusability%20Of%20Zinc%20Oxide%20Nanorod%20For%20Photocatalytic%20Decomposition%20Of%20Rhodamine%20B%20Dye%20After%20Copper%20Metal%20Deposition_Le%20Anh%20Thi.pdf
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spelling	my-usm-ep.560622022-12-21T02:29:58Z Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition 2018-12-01 Le, Anh Thi T Technology TN Mining Engineering. Metallurgy Advanced oxidation process based on semiconductor photocatalysts is an emerging technique for wastewater treatment. However, the lifetime of these semiconductor photocatalysts is yet to be fully studied. After heavy metal removal, most active sites of catalyst are blocked by heavy metal. Therefore, it affects the subsequent photocatalytic performance differently in organic dye removal. In this work, ZnO nanorods (NRs) and nanodisks (NDs) were synthesized by precipitation method and evaluate the photocatalytic activity to degrade Rhodamine B dye after heavy metal deposition. The average length and diameter of ZnO NRs were 497.34 ± 15.55 nm and 75.78 ± 10.39 nm, respectively. The ZnO NDs have average diameter of 2.12 ± 0.39 µm and thickness of 74.91 ± 17.67 nm. The photodegradation of RhB dye by ZnO particles followed first-order kinetic reaction. ZnO NRs removed effectively heavy metal ions such as Cu(II), Ag(I) and Pb(II) ions with efficiency of 100%, 97.92% and 85.18%, respectively under exposure of UV light for 1 hour. However, poor removal efficiency, i.e. 14.83%, 8.62%, 7.23% and 4.76%, respectively was observed for Cr(VI), Mn(II), Cd(II) and Ni(II). These heavy metal ions were removed in the forms of metals or metal oxide via reduction/oxidation or adsorption mechanisms. The degradation efficiencies of RhB dye by Cu/ZnO, Ag/ZnO, Mn/ZnO, Cd/ZnO and Ni/ZnO hybrid particles were better than ZnO particles but not the case of Pb/ZnO and Cr/ZnO hybrid particles. In conclusion, the ZnO NRs in general showed a remarkable ability to degrade RhB dye under UV irradiation after heavy metal deposition. 2018-12 Thesis http://eprints.usm.my/56062/ http://eprints.usm.my/56062/1/Reusability%20Of%20Zinc%20Oxide%20Nanorod%20For%20Photocatalytic%20Decomposition%20Of%20Rhodamine%20B%20Dye%20After%20Copper%20Metal%20Deposition_Le%20Anh%20Thi.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	T Technology T Technology
spellingShingle	T Technology T Technology Le, Anh Thi Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
description	Advanced oxidation process based on semiconductor photocatalysts is an emerging technique for wastewater treatment. However, the lifetime of these semiconductor photocatalysts is yet to be fully studied. After heavy metal removal, most active sites of catalyst are blocked by heavy metal. Therefore, it affects the subsequent photocatalytic performance differently in organic dye removal. In this work, ZnO nanorods (NRs) and nanodisks (NDs) were synthesized by precipitation method and evaluate the photocatalytic activity to degrade Rhodamine B dye after heavy metal deposition. The average length and diameter of ZnO NRs were 497.34 ± 15.55 nm and 75.78 ± 10.39 nm, respectively. The ZnO NDs have average diameter of 2.12 ± 0.39 µm and thickness of 74.91 ± 17.67 nm. The photodegradation of RhB dye by ZnO particles followed first-order kinetic reaction. ZnO NRs removed effectively heavy metal ions such as Cu(II), Ag(I) and Pb(II) ions with efficiency of 100%, 97.92% and 85.18%, respectively under exposure of UV light for 1 hour. However, poor removal efficiency, i.e. 14.83%, 8.62%, 7.23% and 4.76%, respectively was observed for Cr(VI), Mn(II), Cd(II) and Ni(II). These heavy metal ions were removed in the forms of metals or metal oxide via reduction/oxidation or adsorption mechanisms. The degradation efficiencies of RhB dye by Cu/ZnO, Ag/ZnO, Mn/ZnO, Cd/ZnO and Ni/ZnO hybrid particles were better than ZnO particles but not the case of Pb/ZnO and Cr/ZnO hybrid particles. In conclusion, the ZnO NRs in general showed a remarkable ability to degrade RhB dye under UV irradiation after heavy metal deposition.
format	Thesis
qualification_level	Master's degree
author	Le, Anh Thi
author_facet	Le, Anh Thi
author_sort	Le, Anh Thi
title	Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
title_short	Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
title_full	Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
title_fullStr	Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
title_full_unstemmed	Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition
title_sort	reusability of zinc oxide nanorod for photocatalytic decomposition of rhodamine b dye after copper metal deposition
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan dan Sumber Mineral
publishDate	2018
url	http://eprints.usm.my/56062/1/Reusability%20Of%20Zinc%20Oxide%20Nanorod%20For%20Photocatalytic%20Decomposition%20Of%20Rhodamine%20B%20Dye%20After%20Copper%20Metal%20Deposition_Le%20Anh%20Thi.pdf
_version_	1776101127202275328

Reusability Of Zinc Oxide Nanorod For Photocatalytic Decomposition Of Rhodamine B Dye After Copper Metal Deposition

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