Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater
Methylene blue is a refractory pollutant commonly present in textile wastewater. This study tests the feasibility of TiO2/graphene oxide (GO) composite in enhancing photocatalytic degradation of MB in synthetic wastewater with respect to scientific and engineering aspects. To enhance its removal, we...
Saved in:
Main Authors: | , , , , , , |
---|---|
Format: | Article |
Published: |
Academic Press
2020
|
Subjects: | |
Online Access: | http://eprints.utm.my/id/eprint/89852/ http://dx.doi.org/10.1016/j.jenvman.2020.110871 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
id |
my.utm.89852 |
---|---|
record_format |
eprints |
spelling |
my.utm.898522021-03-04T02:45:33Z http://eprints.utm.my/id/eprint/89852/ Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater Kurniawan, Tonni Agustiono Zhu, Mengting Dun, Fu Yeap, Swee Keong Othman, Mohd. Hafiz Dzarfan Avtar, Ram Tong, Ouyang TP Chemical technology Methylene blue is a refractory pollutant commonly present in textile wastewater. This study tests the feasibility of TiO2/graphene oxide (GO) composite in enhancing photocatalytic degradation of MB in synthetic wastewater with respect to scientific and engineering aspects. To enhance its removal, we vary the composition of the composite based on the TiO2 weight. Under UV–vis irradiation, the effects of photocatalyst's dose, pH, and reaction time on MB removal by the composites are evaluated under optimum conditions, while any changes in their physico-chemical properties before and after treatment are analyzed by using TEM, SEM, XRD, FTIR and BET. The photodegradation pathways of the target pollutant by the composite and its removal mechanisms are also elaborated. It is found that the same composite with a 1:2 wt ratio of GO/TiO2 has the largest surface area of 104.51 m2/g. Under optimum reactions (0.2 g/L of dose, pH 10, and 5 mg/L of pollutant's concentration), an almost complete MB removal could be attained within 4 h. This result is higher than that of the TiO2 alone (30%) under the same conditions. Since the treated effluents could meet the strict discharge standard limit of ≤0.2 μg/L set by China's regulation, subsequent biological treatments are unnecessary for completing biodegradation of remaining oxidation by-products in the wastewater effluents. Academic Press 2020-09 Article PeerReviewed Kurniawan, Tonni Agustiono and Zhu, Mengting and Dun, Fu and Yeap, Swee Keong and Othman, Mohd. Hafiz Dzarfan and Avtar, Ram and Tong, Ouyang (2020) Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater. Journal of Environmental Management, 270 . p. 110871. ISSN 0301-4797 http://dx.doi.org/10.1016/j.jenvman.2020.110871 |
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 Kurniawan, Tonni Agustiono Zhu, Mengting Dun, Fu Yeap, Swee Keong Othman, Mohd. Hafiz Dzarfan Avtar, Ram Tong, Ouyang Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
description |
Methylene blue is a refractory pollutant commonly present in textile wastewater. This study tests the feasibility of TiO2/graphene oxide (GO) composite in enhancing photocatalytic degradation of MB in synthetic wastewater with respect to scientific and engineering aspects. To enhance its removal, we vary the composition of the composite based on the TiO2 weight. Under UV–vis irradiation, the effects of photocatalyst's dose, pH, and reaction time on MB removal by the composites are evaluated under optimum conditions, while any changes in their physico-chemical properties before and after treatment are analyzed by using TEM, SEM, XRD, FTIR and BET. The photodegradation pathways of the target pollutant by the composite and its removal mechanisms are also elaborated. It is found that the same composite with a 1:2 wt ratio of GO/TiO2 has the largest surface area of 104.51 m2/g. Under optimum reactions (0.2 g/L of dose, pH 10, and 5 mg/L of pollutant's concentration), an almost complete MB removal could be attained within 4 h. This result is higher than that of the TiO2 alone (30%) under the same conditions. Since the treated effluents could meet the strict discharge standard limit of ≤0.2 μg/L set by China's regulation, subsequent biological treatments are unnecessary for completing biodegradation of remaining oxidation by-products in the wastewater effluents. |
format |
Article |
author |
Kurniawan, Tonni Agustiono Zhu, Mengting Dun, Fu Yeap, Swee Keong Othman, Mohd. Hafiz Dzarfan Avtar, Ram Tong, Ouyang |
author_facet |
Kurniawan, Tonni Agustiono Zhu, Mengting Dun, Fu Yeap, Swee Keong Othman, Mohd. Hafiz Dzarfan Avtar, Ram Tong, Ouyang |
author_sort |
Kurniawan, Tonni Agustiono |
title |
Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
title_short |
Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
title_full |
Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
title_fullStr |
Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
title_full_unstemmed |
Functionalizing TiO2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (MB) in contaminated wastewater |
title_sort |
functionalizing tio2 with graphene oxide for enhancing photocatalytic degradation of methylene blue (mb) in contaminated wastewater |
publisher |
Academic Press |
publishDate |
2020 |
url |
http://eprints.utm.my/id/eprint/89852/ http://dx.doi.org/10.1016/j.jenvman.2020.110871 |
_version_ |
1693725955369992192 |
score |
13.188404 |