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Language: English

Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 11, 2022
Revised November 26, 2022
Accepted December 5, 2022

Acknowledgements: Authors sincerely appreciate the King Khalid University for the research grant (KKU/RCAMS/22) under the Research Center for Advanced Materials Science (RCAMS) at King Khalid University, Saudi Arabia. Authors are also thankful to the Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur and Higher Education Commission (HEC) Islamabad, Pakistan.

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Zinc oxide-tungsten oxide (ZnO-WO3) composite for solar light-assisted degradation of organic dyes

Fatima Aziz¹ Al-Zoha Warsi¹ Hamoud H. Somaily^{2 3} Muhammad Imran Din⁴ Humera Sabeeh¹ Muhammad Farooq Warsi^1† Imran Shakir^5†

¹Institute of Chemistry, Baghdad-ul-Jadeed Campus, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan ²Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha 61413, P.O. Box 9004, Saudi Arabia ³Department of Physics, Faculty of Science, King Khalid University, P.O. Box 9004, Abha, Saudi Arabia ⁴School of Chemistry, University of the Punjab, New Campus, Lahore 54590, Pakistan ⁵Department of Materials Science and Engineering, University of California, Lose Angles, United States of America

farooq.warsi@iub.edu.pk, mshakir@ucla.edu

Korean Journal of Chemical Engineering, June 2023, 40(6), 1497-1509(13), 10.1007/s11814-022-1368-9

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Abstract

Photocatalytic degradation of dyes is one of the most effective methods that can be utilized for a pollutionfree environment. For this purpose, Tungsten oxide (WO3), zinc oxide (ZnO) and their composite WO3/ZnO were synthesized using facile route. X-rays diffraction (XRD), Fourier transform infra-red spectroscopy (FTIR) and scanning electron microscopy (SEM) confirmed their structural, spectral and morphological features, respectively. These techniques confirmed the formation of desired products. The as-prepared samples were utilized as photocatalysts for the evaluation of the photocatalytic removal of methylene blue and rhodamine B under solar light irradiation. The obtained results showed that the synergistic effect of tungsten oxide and zinc oxide is responsible for the increased charge separation and reduction in recombination chances of charge carriers that enhance the remarkable photocatalytic performance. For methylene blue and rhodamine-b, the percentage degradation was 94% and 85.7%, respectively. Different scavenger studies showed that holes are the major active species responsible for the removal of methylene blue. The EIS and Mott-Schottky plots confirmed the p-type and n-type character of WO3 and ZnO, respectively. Briefly, the as-synthesized nanocomposite showed enhanced photocatalytic behavior for the degradation of various dyes as compared to pristine metal oxides

Keywords

Metal Oxide Nanoparticles XRD Photocatalysis EIS Mott-Schottk

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