Abstract
In this study, tungsten trioxide/titanium dioxide (WO3–TiO2) nanohybrid structures were prepared using a facile hydrothermal method. The nanosheets-like morphology was achieved for the prepared WO3–TiO2 nanohybrid that were confirmed by scanning electron microscopy. Provided X-ray photoelectron spectroscopy results also confirm the element existence and surface composition of the nanohybrid structure. The optical properties of the WO3–TiO2 nanohybrid were verified using UV–Visible diffuse reflectance spectroscopy (UV–Vis DRS) and photoluminescence spectroscopy. The UV–Vis DRS results indicated that the absorption edge for the WO3–TiO2 nanohybrid found a red shift towards the visible region due to the reduced bandgap (2.83 eV). The photocatalytic activity of the as-prepared WO3–TiO2 nanohybrid was evaluated by the photocatalytic degradation of Orange G dye in wastewaters under visible light. 94% Orange G dye was degraded in 210 min at neutral pH in the presence of WO3–TiO2 nanohybrid, which indicates the enhanced photocatalytic activity. The photo-luminescence technique has also confirmed the formation of –OH radicals during photodegradation by utilizing terephthalic acid as a probe molecule. These results indicate that the prepared nanohybrid material is a simple, low-cost, and efficient photocatalyst for the degradation of pollutants in wastewater treatment applications.
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Acknowledgements
The Department of Science and Technology, India sponsored this research under the Water Technology Initiative scheme (Grant No. DST/TM/WTI/2K16/258). The author (Najat Marraiki) extends their appreciation to The Researchers Supporting Project number (Grant No. RSP-2020/201) King Saud University, Saudi Arabia. This research work was supported financially by the Grant MOST107-2113-M-037-007-MY2 from Ministry of Science and Technology, Taiwan and also supported by the Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan from“The Featured Areas Research Center Program within the framework of the Higher Education Sprout Project” by the Ministry of Education (MOE) in Taiwan. The authors gratefully acknowledge the use of SEM, XRD equipment provided by the Instrument Center of National Cheng Kung University, Tainan, Taiwan.
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Bhagwat, U.O., Kumar, K.R., Syed, A. et al. Facile Hydrothermal Synthesis of Tungsten Tri-oxide/Titanium Di-oxide Nanohybrid Structures as Photocatalyst for Wastewater Treatment Application. J Clust Sci 33, 1327–1336 (2022). https://doi.org/10.1007/s10876-021-02053-0
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DOI: https://doi.org/10.1007/s10876-021-02053-0