Abstract
The molybdenum trioxide (MoO3) is the highly intriguing transition metal oxide with outstanding photocatalytic activity mainly with organic pollutants. In this study, two types of MoO3 has been successfully synthesized by sol–gel (SG-MoO3) and hydrothermal (HT-MoO3) methods. The structure, morphology, and functional groups of the synthesized samples have been characterized by X-ray diffraction (XRD), scanning, and transmission electron microscope (SEM and TEM), and Fourier-transform infrared spectroscopy, respectively. The thermal stability has been explored by thermogravimetric analysis (TGA). The obtained results show that both samples were crystallized in the orthorhombic structure. FTIR peaks for both samples are inconsistent with the XRD results. SEM images show that the prepared samples possess a belt-like shape; their size is ranging from 12.7 to 44.5 nm for SG-MoO3, and 2.5–7.7 nm for HT-MoO3. To assess the photocatalytic activity, the photodegradation of methylene blue (MB) was studied. The effect of the exposure time, catalyst load, and wavelength of the excitation source was investigated. The results showed that the synthesized MoO3 has a good photocatalytic activity to degrade the organic dye of MB in the aqueous solution. The removal rate of the MB with α-MoO3 increases as the irradiation time increases. It is also found that the removal rate of MB increases with the increase of the catalyst load prepared by both methods. Furthermore, the photodegradation efficiency of the MB with MoO3 induced by visible light irradiation is slightly higher than the samples irradiated by UV light at the same catalyst concentrations.
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12 July 2021
A Correction to this paper has been published: https://doi.org/10.1007/s10904-021-02038-6
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The authors extend their appreciation to the Deanship for Research & Innovation, Ministry of Education in Saudi Arabia for funding this research work through the Project Number IF 2020022Sci. The authors also gratefully acknowledge the use of the services and facilities of the Basic and Applied Scientific Research Center (BASRC).
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The original version of this article was revised: The original version of this article unfortunately contained a mistake. The affiliation of author Khaled A. Elsayed was incorrect. The corrected affiliation is given in 3 below. The original article was corrected.
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Al-Alotaibi, A.L., Altamimi, N., Howsawi, E. et al. Synthesis and Characterization of MoO3 for Photocatalytic Applications. J Inorg Organomet Polym 31, 2017–2029 (2021). https://doi.org/10.1007/s10904-021-01939-w
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DOI: https://doi.org/10.1007/s10904-021-01939-w