Novel sol–gel synthesis of Mo-doped ZnO-NPs for photo-catalytic waste water treatment using the RhB dye as a model pollutant

Muhammad Sohaib, Tahir Iqbal (), Sumera Afsheen, M. B. Tahir, Arslan Masood, Muhammad Rafique, K. N. Riaz, M. A. Sayed, A. F. Abd El-Rehim and Atif Mossad Ali
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Muhammad Sohaib: University of Gujrat
Tahir Iqbal: University of Gujrat
Sumera Afsheen: University of Gujrat
M. B. Tahir: Khawaja Fareed University of Engineering and Information Technology
Arslan Masood: University of Gujrat
Muhammad Rafique: University of Sahiwal
K. N. Riaz: University of Okara
M. A. Sayed: King Khalid University
A. F. Abd El-Rehim: King Khalid University
Atif Mossad Ali: King Khalid University

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2023, vol. 25, issue 10, No 41, 11583-11598

Abstract: Abstract Photo-catalytic wastewater treatment is one of the most environmentally friendly, sound and cost-effective technique but the challenge is to identify the most efficient photo-catalyst. After titanium dioxide, zinc oxide (ZnO) is the most extensively utilized and readily available photo-catalyst for treating wastewater. The need of the hour is to improve its catalytic degrading efficacy so that it may be used as a commercial photo-catalyst. In this study, pure and Molybdenum (Mo-1, 2 and 3%)-doped ZnO nanoparticles (NPs) were fabricated via facile and cost-effective chemical sol–gel method. The influence of dopant concentration on pure ZnO-NPs has been investigated by examining their structural, optical and chemical properties. Fabricated NPs were analyzed using a variety of advanced characterization techniques such as XRD, EDS, SEM, UV–Visible, FTIR and PL spectroscopy. The Mo-doped ZnO XRD patterns show a wurtzite hexagonal crystal structure. It was discovered that the crystallite size of Mo-doped ZnO is significantly smaller than that of pure ZnO and declines as the Mo concentration increases. The photo-catalytic activity of 2% Mo-doped ZnO in Rhodamine B (RhB) degradation was investigated. It was discovered that the degradation efficiency of RhB over Mo-doped ZnO rises up to 2% doping and subsequently declines as doping levels increase.

Keywords: ZnO-NPs; Mo-doped ZnO-NPs; RhB dye; Photo-catalytic activity (search for similar items in EconPapers)
Date: 2023
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DOI: 10.1007/s10668-022-02543-9

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