Mesoporous bimetallic S-doped nanoparticles prepared via hydrothermal method for enhanced photodegradation of 4-chlorophenol
Document Type
Journal Article
Publication Title
Journal of Environmental Management
Volume
349
PubMed ID
37939471
Publisher
Elsevier
School
School of Engineering
RAS ID
64656
Funders
Isfahan University of Medical Sciences of Isfahan, Iran
Abstract
Magnesium oxides (MgO) have gained shown significant promise for a variety of applications, which can be modified by ions doping. In this study, bimetallic Ag-doped S–MgO nanoparticles were prepared by hydrothermal method and used for photocatalytic degradation of 4-chlorophenl (4-CP). EDX suggested the presence of no impurities, which mainly contained Mg, Ag, and S elements, suggesting that S and Ag were incorporated into the lattice of MgO as a result of successful doping. Estimated bandgap of Ag-doped S–MgO nanoparticles was 3.7 eV, lower than MgO (7.8 eV), but useful to improve optical characteristics and photocatalytic efficiency to degrade 4-CP up to a maximum of 99.60 ± 0.50%. The synergetic parameter during photocatalysis of 4-CP was 6.91, confirming the degradation of 4-CP. Quenching experiments proved the presence of hydroxyl radicals ( OH) and singlet dioxygen (1O2) that were critical in 4-CP degradation. The kinetics rate constant was increased by 24.8% from 0.086 ± 0.004 to 0.108 ± 0.005 min−1 by the addition of sulfate in the reaction medium. The work proposes a new synthetic method for preparing catalysts that are capable of producing in-situ OH radicals and 1O2 to decompose the organic contaminants.
DOI
10.1016/j.jenvman.2023.119460
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Taheri, E., Fatehizadeh, A., Hadi, S., Amin, M. M., Khiadani, M., Ghasemian, M., & Aminabhavi, T. M. (2024). Mesoporous bimetallic S-doped nanoparticles prepared via hydrothermal method for enhanced photodegradation of 4-chlorophenol. Journal of Environmental Management, 349, article 119460. https://doi.org/10.1016/j.jenvman.2023.119460