Optimisation, Synthesis, and Characterisation of ZnO Nanoparticles Using Leonotis ocymifolia (L. ocymifolia) Leaf Extracts for Antibacterial and Photodegradation Applications DOI Open Access
Dorcas Mutukwa, Raymond Taziwa, Shepherd M. Tichapondwa

et al.

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(21), P. 11621 - 11621

Published: Oct. 29, 2024

This work presents a green synthesis route, which utilises extracts from an indigenous plant in South Africa, eastern and southern Africa that is understudied underutilised, for preparing zinc oxide nanoparticles (ZnO NPs). study involved optimisation of the method using Leonotis ocymifolia (L.O.) performing comparative studies on effects different (Zn) salt precursors; sulphate heptahydrate (Z001) acetate dihydrate (Z002) to synthesise ZnO NPs. The also compared L.O-mediated NPs chemical-mediated (Z003). as-prepared were tested their effectiveness photodegradation methylene blue (MB) dye. Furthermore, antibacterial conducted agar well diffusion Escherichia coli (E. coli) Staphylococcus aureus (S. aureus) bacteria. structural, morphological, optical characteristics synthesised analysed XRD, FTIR, SEM, EDS, DRS, BET techniques. XRD results indicated had smaller crystallite sizes (18.24–19.32 nm) than chemically counterparts (21.50 nm). FTIR confirmed presence biomolecules surface NPs, DRS analysis revealed bandgap energies between 3.07 3.18 eV. EDS chemical composition made up Zn O atoms. Photocatalytic demonstrated exhibited superior degradation efficiency MB dye (89.81%) (56.13%) under ultraviolet (UV) light 240 min. Antibacterial tests showed more effective against S. E. coli. enhanced photocatalytic properties highlight potential environmental remediation antimicrobial applications, thus supporting sustainable development goals.

Language: Английский

Sustainable biofabrication and structural characterization of ZnO nanoparticles using terpene-rich fraction from Orthosiphon aristatus Extract: Insights into biomedical and environmental applications DOI
Prabukumar Seetharaman, Bo Liu,

Ananth Sivapunniyam

et al.

Journal of Molecular Structure, Journal Year: 2025, Volume and Issue: 1340, P. 142489 - 142489

Published: May 6, 2025

Language: Английский

Citations

0
Degradation of malachite green by UV/H2O2 and UV/H2O2/Fe2+ processes: kinetics and mechanism DOI Creative Commons

Sumaira Wilayat,

Perveen Fazil,

Javed Ali Khan

et al.

Frontiers in Chemistry, Journal Year: 2024, Volume and Issue: 12

Published: Oct. 24, 2024

This work investigated the photochemical degradation of malachite green (MG), a cationic triphenylmethane dye used as coloring agent, fungicide, and antiseptic. UV photolysis was ineffective in removal MG only 12.35% (10 mg/L) achieved after 60 min irradiation. In contrast, 100.00% observed irradiation presence 10 mM H

Language: Английский

Citations

2
Optimisation, Synthesis, and Characterisation of ZnO Nanoparticles Using Leonotis ocymifolia (L. ocymifolia) Leaf Extracts for Antibacterial and Photodegradation Applications DOI Open Access
Dorcas Mutukwa, Raymond Taziwa, Shepherd M. Tichapondwa

et al.

International Journal of Molecular Sciences, Journal Year: 2024, Volume and Issue: 25(21), P. 11621 - 11621

Published: Oct. 29, 2024

This work presents a green synthesis route, which utilises extracts from an indigenous plant in South Africa, eastern and southern Africa that is understudied underutilised, for preparing zinc oxide nanoparticles (ZnO NPs). study involved optimisation of the method using Leonotis ocymifolia (L.O.) performing comparative studies on effects different (Zn) salt precursors; sulphate heptahydrate (Z001) acetate dihydrate (Z002) to synthesise ZnO NPs. The also compared L.O-mediated NPs chemical-mediated (Z003). as-prepared were tested their effectiveness photodegradation methylene blue (MB) dye. Furthermore, antibacterial conducted agar well diffusion Escherichia coli (E. coli) Staphylococcus aureus (S. aureus) bacteria. structural, morphological, optical characteristics synthesised analysed XRD, FTIR, SEM, EDS, DRS, BET techniques. XRD results indicated had smaller crystallite sizes (18.24–19.32 nm) than chemically counterparts (21.50 nm). FTIR confirmed presence biomolecules surface NPs, DRS analysis revealed bandgap energies between 3.07 3.18 eV. EDS chemical composition made up Zn O atoms. Photocatalytic demonstrated exhibited superior degradation efficiency MB dye (89.81%) (56.13%) under ultraviolet (UV) light 240 min. Antibacterial tests showed more effective against S. E. coli. enhanced photocatalytic properties highlight potential environmental remediation antimicrobial applications, thus supporting sustainable development goals.

Language: Английский

Citations

2