Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers

One of mankind’s biggest concerns is water pollution. Textile industry emerged as one of the main contributors with dyes as the main pollutant. Presence of dyes in water is very dangerous due to their toxicity; thus, it is important to remove them from water. In these recent years, heterogeneous adv...

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Main Authors: Mohamed Isa, Eleen Dayana, Che Jusoh, Nurfatehah Wahyuny, Hazan, Roshasnorlyza, Shameli, Kamyar
Format: Article
Published: Springer Science and Business Media Deutschland GmbH 2020
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Online Access:http://eprints.utm.my/id/eprint/91528/
http://dx.doi.org/10.1007/s11356-020-10939-1
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spelling my.utm.915282021-06-30T12:17:38Z http://eprints.utm.my/id/eprint/91528/ Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers Mohamed Isa, Eleen Dayana Che Jusoh, Nurfatehah Wahyuny Hazan, Roshasnorlyza Shameli, Kamyar TP Chemical technology One of mankind’s biggest concerns is water pollution. Textile industry emerged as one of the main contributors with dyes as the main pollutant. Presence of dyes in water is very dangerous due to their toxicity; thus, it is important to remove them from water. In these recent years, heterogeneous advance oxidation process surfaced as a possible dyes’ removal technique. This process utilizes semiconductor as photocatalyst to degrade the dyes in presence of light and zinc oxide (ZnO) appears to be a promising photocatalyst for this process. In this study, pullulan, a biopolymer, was used to produce porous ZnO microflowers (ZnO-MFs) through green synthesis via precipitation method. The effects of pullulan’s amount on the properties of ZnO-MFs were investigated. The ZnO-MF particle size decreased with the increased of pullulan amount. Interestingly, formation of pores occurred in presence of pullulan. The synthesized ZnO-MFs have the surface area ranging from 6.22 to 25.65 m2 g−1 and pore volume up to 0.1123 cm3 g−1. The ZnO-MF with the highest surface area was chosen for photocatalytic degradation of methyl orange (MO). The highest degradation occurred in 300 min with 150 mg catalyst dosage, 10 ppm initial dye concentration, and pH 7 experimental conditions. However, through comparison of photodegradation of MO with all synthesized ZnO-MFs, 25PZ exhibited the highest degradation rate. This shows that photocatalytic activity is not dependent on surface area alone. Based on these results, ZnO-MF has the potential to be applied in wastewater treatment. However, further improvement is needed to increase its photocatalytic activity. Springer Science and Business Media Deutschland GmbH 2020-09 Article PeerReviewed Mohamed Isa, Eleen Dayana and Che Jusoh, Nurfatehah Wahyuny and Hazan, Roshasnorlyza and Shameli, Kamyar (2020) Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers. Environmental Science and Pollution Research, 28 (5). pp. 5774-5785. ISSN 0944-1344 http://dx.doi.org/10.1007/s11356-020-10939-1 DOI:10.1007/s11356-020-10939-1
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 TP Chemical technology
spellingShingle TP Chemical technology
Mohamed Isa, Eleen Dayana
Che Jusoh, Nurfatehah Wahyuny
Hazan, Roshasnorlyza
Shameli, Kamyar
Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
description One of mankind’s biggest concerns is water pollution. Textile industry emerged as one of the main contributors with dyes as the main pollutant. Presence of dyes in water is very dangerous due to their toxicity; thus, it is important to remove them from water. In these recent years, heterogeneous advance oxidation process surfaced as a possible dyes’ removal technique. This process utilizes semiconductor as photocatalyst to degrade the dyes in presence of light and zinc oxide (ZnO) appears to be a promising photocatalyst for this process. In this study, pullulan, a biopolymer, was used to produce porous ZnO microflowers (ZnO-MFs) through green synthesis via precipitation method. The effects of pullulan’s amount on the properties of ZnO-MFs were investigated. The ZnO-MF particle size decreased with the increased of pullulan amount. Interestingly, formation of pores occurred in presence of pullulan. The synthesized ZnO-MFs have the surface area ranging from 6.22 to 25.65 m2 g−1 and pore volume up to 0.1123 cm3 g−1. The ZnO-MF with the highest surface area was chosen for photocatalytic degradation of methyl orange (MO). The highest degradation occurred in 300 min with 150 mg catalyst dosage, 10 ppm initial dye concentration, and pH 7 experimental conditions. However, through comparison of photodegradation of MO with all synthesized ZnO-MFs, 25PZ exhibited the highest degradation rate. This shows that photocatalytic activity is not dependent on surface area alone. Based on these results, ZnO-MF has the potential to be applied in wastewater treatment. However, further improvement is needed to increase its photocatalytic activity.
format Article
author Mohamed Isa, Eleen Dayana
Che Jusoh, Nurfatehah Wahyuny
Hazan, Roshasnorlyza
Shameli, Kamyar
author_facet Mohamed Isa, Eleen Dayana
Che Jusoh, Nurfatehah Wahyuny
Hazan, Roshasnorlyza
Shameli, Kamyar
author_sort Mohamed Isa, Eleen Dayana
title Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
title_short Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
title_full Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
title_fullStr Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
title_full_unstemmed Photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
title_sort photocatalytic degradation of methyl orange using pullulan-mediated porous zinc oxide microflowers
publisher Springer Science and Business Media Deutschland GmbH
publishDate 2020
url http://eprints.utm.my/id/eprint/91528/
http://dx.doi.org/10.1007/s11356-020-10939-1
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