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Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation

This research fabricated a hybrid of α-MoO3/ZnO heterostructures via ultrasonic-assisted hydrothermal synthesis and evaluated its photocatalytic activity by degradation of Methylene Blue dye (MB) under visible light irradiations. The physicochemical properties of the heterostructure were characteriz...

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Main Authors:	Ibrahim, Yusuf, Abdullah, Abdul Halim, Abdul Rashid, Suraya, Muhamad, Ernee Noryana
Format:	Article
Published:	Elsevier 2023
Online Access:	http://psasir.upm.edu.my/id/eprint/109332/ https://www.sciencedirect.com/science/article/pii/S0925346722014100?via%3Dihub
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spelling	my.upm.eprints.1093322024-08-05T03:58:46Z http://psasir.upm.edu.my/id/eprint/109332/ Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation Ibrahim, Yusuf Abdullah, Abdul Halim Abdul Rashid, Suraya Muhamad, Ernee Noryana This research fabricated a hybrid of α-MoO3/ZnO heterostructures via ultrasonic-assisted hydrothermal synthesis and evaluated its photocatalytic activity by degradation of Methylene Blue dye (MB) under visible light irradiations. The physicochemical properties of the heterostructure were characterized using several solid-state characterization techniques. Which indicated that with the addition of α-MoO3, there is a change in morphology from ZnO hexagonal to anorthic nanorods, then gradual to a rod like shape. The α-MoO3/ZnO in the ratio of 2:1 (MZ-21) exhibited a faster MB degradation rate of 0.411 min−1, which is three times faster than that of the ZnO nanoparticle. Various parameters, such as catalyst dosage, initial MB concentration, and pH, were varied to determine the optimum condition for the MB degradation. The photodegradation percentage for α-MoO3/ZnO (MZ21) of 99 is higher than that of ZnO (53), suggesting that the addition of MoO3 to the hybrids enhanced the degradation efficiency. The photodegradation process follows pseudo-first-order kinetics. The radical scavenger's influence on MB degradation provides insights into the MB degradation mechanism. The dominant species that contributed the highest effect toward MB degradation were the OH radical, followed by .O2− radical species, signifying that they are the species largely responsible for the attack of MB dye molecules. The reusability studies revealed that the hybrid photocatalyst could be repeatedly used up to four times without severe deactivation, indicating the excellent reliability of the hybrid. Elsevier 2023-02 Article PeerReviewed Ibrahim, Yusuf and Abdullah, Abdul Halim and Abdul Rashid, Suraya and Muhamad, Ernee Noryana (2023) Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation. Optical Materials, 136. art. no. 113371. pp. 1-12. ISSN 0925-3467; ESSN: 1873-1252 https://www.sciencedirect.com/science/article/pii/S0925346722014100?via%3Dihub 10.1016/j.optmat.2022.113371
institution	Universiti Putra Malaysia
building	UPM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Putra Malaysia
content_source	UPM Institutional Repository
url_provider	http://psasir.upm.edu.my/
description	This research fabricated a hybrid of α-MoO3/ZnO heterostructures via ultrasonic-assisted hydrothermal synthesis and evaluated its photocatalytic activity by degradation of Methylene Blue dye (MB) under visible light irradiations. The physicochemical properties of the heterostructure were characterized using several solid-state characterization techniques. Which indicated that with the addition of α-MoO3, there is a change in morphology from ZnO hexagonal to anorthic nanorods, then gradual to a rod like shape. The α-MoO3/ZnO in the ratio of 2:1 (MZ-21) exhibited a faster MB degradation rate of 0.411 min−1, which is three times faster than that of the ZnO nanoparticle. Various parameters, such as catalyst dosage, initial MB concentration, and pH, were varied to determine the optimum condition for the MB degradation. The photodegradation percentage for α-MoO3/ZnO (MZ21) of 99 is higher than that of ZnO (53), suggesting that the addition of MoO3 to the hybrids enhanced the degradation efficiency. The photodegradation process follows pseudo-first-order kinetics. The radical scavenger's influence on MB degradation provides insights into the MB degradation mechanism. The dominant species that contributed the highest effect toward MB degradation were the OH radical, followed by .O2− radical species, signifying that they are the species largely responsible for the attack of MB dye molecules. The reusability studies revealed that the hybrid photocatalyst could be repeatedly used up to four times without severe deactivation, indicating the excellent reliability of the hybrid.
format	Article
author	Ibrahim, Yusuf Abdullah, Abdul Halim Abdul Rashid, Suraya Muhamad, Ernee Noryana
spellingShingle	Ibrahim, Yusuf Abdullah, Abdul Halim Abdul Rashid, Suraya Muhamad, Ernee Noryana Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
author_facet	Ibrahim, Yusuf Abdullah, Abdul Halim Abdul Rashid, Suraya Muhamad, Ernee Noryana
author_sort	Ibrahim, Yusuf
title	Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
title_short	Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
title_full	Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
title_fullStr	Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
title_full_unstemmed	Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation
title_sort	synthesis, physicochemical characterization of zno and α-moo3/ zno heterostructures and their photocatalytic activity for the methylene blue (mb) dye degradation
publisher	Elsevier
publishDate	2023
url	http://psasir.upm.edu.my/id/eprint/109332/ https://www.sciencedirect.com/science/article/pii/S0925346722014100?via%3Dihub
_version_	1806690492267626496
score	13.211869

Synthesis, physicochemical characterization of ZnO and α-MoO3/ ZnO heterostructures and their photocatalytic activity for the methylene blue (MB) dye degradation

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