A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange

The degradation of azo dyes in aquatic environments is still challenging due to their stability and perpetual effect. This work demonstrates the application of highly ultraviolet-responsive titanium dioxide/molybdenum photocatalyst to degrade methyl orange. A series of titanium dioxide/molybdenum ph...

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Published in:International Journal of Environmental Science and Technology
Main Author: Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
Format: Article
Language:English
Published: Springer Science and Business Media Deutschland GmbH 2022
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108264919&doi=10.1007%2fs13762-021-03484-y&partnerID=40&md5=e494bedd2954fa100b6dcf7715c88c37
id 2-s2.0-85108264919
spelling 2-s2.0-85108264919
Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
2022
International Journal of Environmental Science and Technology
19
6
10.1007/s13762-021-03484-y
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108264919&doi=10.1007%2fs13762-021-03484-y&partnerID=40&md5=e494bedd2954fa100b6dcf7715c88c37
The degradation of azo dyes in aquatic environments is still challenging due to their stability and perpetual effect. This work demonstrates the application of highly ultraviolet-responsive titanium dioxide/molybdenum photocatalyst to degrade methyl orange. A series of titanium dioxide/molybdenum photocatalyst with different molybdenum concentrations (1–10 wt%) were synthesized by a facile wet impregnation method. The introduction of molybdenum has favorably induced changes in surface morphology, crystallite size, optical absorption, and specific surface area, which have collectively enhanced the photocatalytic performance of titanium dioxide/molybdenum photocatalyst on the removal of methyl orange. A systematic investigation on the influencing parameters such as photocatalyst dosage, initial methyl orange concentration, and initial pH was investigated, and the optimum conditions were achieved. The best-performing titanium dioxide/molybdenum (3 wt%) photocatalyst yielded a 94.5% methyl orange photodegradation efficiency within 120 min of irradiation. The dopant concentration, photocatalyst dosage, and pH were investigated to validate the optimized conditions for titanium dioxide/molybdenum on methyl orange removal using response surface methodology via the Box–Behnken design. The present results demonstrated that both the superoxide radical and hydroxyl radical play a primary role in the degradation mechanism. This study provides fresh insight that the successful structural modification of titanium dioxide by molybdenum could enhance the photocatalytic removal of dye wastewater. © 2021, Islamic Azad University (IAU).
Springer Science and Business Media Deutschland GmbH
17351472
English
Article

author Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
spellingShingle Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
author_facet Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
author_sort Kanakaraju D.; Jasni M.A.A.; Lim Y.C.
title A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
title_short A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
title_full A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
title_fullStr A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
title_full_unstemmed A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
title_sort A highly photoresponsive and efficient molybdenum-modified titanium dioxide photocatalyst for the degradation of methyl orange
publishDate 2022
container_title International Journal of Environmental Science and Technology
container_volume 19
container_issue 6
doi_str_mv 10.1007/s13762-021-03484-y
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85108264919&doi=10.1007%2fs13762-021-03484-y&partnerID=40&md5=e494bedd2954fa100b6dcf7715c88c37
description The degradation of azo dyes in aquatic environments is still challenging due to their stability and perpetual effect. This work demonstrates the application of highly ultraviolet-responsive titanium dioxide/molybdenum photocatalyst to degrade methyl orange. A series of titanium dioxide/molybdenum photocatalyst with different molybdenum concentrations (1–10 wt%) were synthesized by a facile wet impregnation method. The introduction of molybdenum has favorably induced changes in surface morphology, crystallite size, optical absorption, and specific surface area, which have collectively enhanced the photocatalytic performance of titanium dioxide/molybdenum photocatalyst on the removal of methyl orange. A systematic investigation on the influencing parameters such as photocatalyst dosage, initial methyl orange concentration, and initial pH was investigated, and the optimum conditions were achieved. The best-performing titanium dioxide/molybdenum (3 wt%) photocatalyst yielded a 94.5% methyl orange photodegradation efficiency within 120 min of irradiation. The dopant concentration, photocatalyst dosage, and pH were investigated to validate the optimized conditions for titanium dioxide/molybdenum on methyl orange removal using response surface methodology via the Box–Behnken design. The present results demonstrated that both the superoxide radical and hydroxyl radical play a primary role in the degradation mechanism. This study provides fresh insight that the successful structural modification of titanium dioxide by molybdenum could enhance the photocatalytic removal of dye wastewater. © 2021, Islamic Azad University (IAU).
publisher Springer Science and Business Media Deutschland GmbH
issn 17351472
language English
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