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

и другие.

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(21), С. 11621 - 11621

Опубликована: Окт. 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.

Язык: Английский

Nanoparticle-Doped Antibacterial and Antifungal Coatings DOI Open Access
Devyani Thapliyal, George D. Verros, Raj Kumar Arya

и другие.

Polymers, Год журнала: 2025, Номер 17(2), С. 247 - 247

Опубликована: Янв. 20, 2025

Antimicrobial polymeric coatings rely not only on their surface functionalities but also nanoparticles (NPs). gain properties from the addition of NPs into a matrix. that have been used include metal-based NPs, metal oxide carbon-based nanomaterials, and organic NPs. Copper silver exhibit antibacterial antifungal properties. So, when present in coatings, they will release ions with combined effect having bacteriostatic/bactericidal properties, preventing growth pathogens surfaces covered by these nano-enhanced films. In addition, such as titanium dioxide (TiO2 NPs) zinc (ZnONPs) are antimicrobial coatings. Under UV irradiation, show photocatalytic lead to production reactive oxygen species (ROS) exposed radiation. After various forms nano-carbon materials were successfully developed over past decade, derivatives graphite/nanotubes, composite sheets receiving more attention because share an extremely large area, excellent mechanical strength, etc. These ability cause oxidative stress chemicals under control, resulting long-lasting action. The effectiveness life spans antifouling performance variety improved adding nano-sized particles those

Язык: Английский

Процитировано

3
Sustainable Nanotechnology for Food Preservation: Synthesis, Mechanisms, and Applications of Zinc Oxide Nanoparticles DOI Creative Commons
Bai Qu,

Zhenlei Xiao,

Yangchao Luo

и другие.

Journal of Agriculture and Food Research, Год журнала: 2025, Номер unknown, С. 101743 - 101743

Опубликована: Фев. 1, 2025

Язык: Английский

Процитировано

2
Size Distribution of Zinc Oxide Nanoparticles Depending on the Temperature of Electrochemical Synthesis DOI Open Access
Michał Hajos, M. Starowicz, Beata Brzychczyk

и другие.

Materials, Год журнала: 2025, Номер 18(2), С. 458 - 458

Опубликована: Янв. 20, 2025

One of the methods for obtaining zinc oxide nanoparticles (ZnO NPs) is electrochemical synthesis. In this study, anodic dissolution process metallic in alcohol solutions LiCl was used to synthesize ZnO NPs. The products were obtained as colloidal suspensions an electrolyte solution. Due small size and ionic nature molecule, tend cluster into larger groupings, so will differ from observed powders after solvent evaporation. main goal research investigate influence temperature synthesis kind on NP micelles. Nanocrystals all tested alcohols: methanol, ethanol, 1-propanol. particle determined using Dynamic Light Scattering (DLS) method. It that particles synthesized methanol largest, followed by smaller while smallest Additionally, ethanol most uniform size, showing highest level homogeneity.

Язык: Английский

Процитировано

1
Photocatalytic activity and anticancer properties of green synthesized ZnO-MgO-Mn2O3 nanocomposite via Ocimum basilicum L. seed extract DOI Creative Commons

Razieh Hazrati Saadabadi,

Fatemeh Shariatmadar Tehrani, Zahra Sabouri

и другие.

Scientific Reports, Год журнала: 2024, Номер 14(1)

Опубликована: Ноя. 30, 2024

Green synthesis using plant extracts such as Ocimum basilicum L. (OBL) seed has attracted attention due to its sustainable and environmentally friendly nature. In this study, ZnO-MgO-Mn2O3 nanocomposites were synthesized OBL extract at two different calcination temperatures of 500 °C 600 °C, evaluated in terms photocatalytic application cytotoxicity. Phytochemicals seeds act reducing masking agents the production route, which leads formation nanomaterials with unique properties. Characterization techniques, including XRD, FE-SEM, DRS used analyze structural, morphological, optical features nanocomposite. XRD results confirmed increasing crystal size from ~ 32 nm (500 °C) 84 (600 °C). Also, FE-SEM images showed irregularly shaped EDX spectra samples presence zinc, magnesium, manganese, oxygen elements. The behavior nanocomposite cacined was investigated for organic pollutants. Removal percentages 97% Eriochrome Black T dye (pH = 10 90 min), 99% methylene blue 60 89% methyl orange 105 86.9% Rhodamine B 3 min) obtained. Moreover, cytotoxicity on 4T1 cell line investgate effect biological systems, IC50 value obtained around 323 µg/mL.

Язык: Английский

Процитировано

6
Characterization and investigation of Bio-inspired ZnO nanoparticles using Prosopis juliflora and Cordia dichotoma for antioxidant and antibacterial applications DOI Creative Commons

R. Subbiah,

S. Anitha,

R. Premila

и другие.

Research Square (Research Square), Год журнала: 2025, Номер unknown

Опубликована: Март 3, 2025

Abstract Green synthesis of zinc oxide nanoparticles was carried out using Prosopis juliflora bark extract and Cordia dichotoma leaf with acetate precursor in the presence 2 M NaOH solution. The prepared were characterized by Powder X-ray diffraction (PXRD), UV-visible absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Photoluminescence (PL) to study its structural optical properties. studies confirmed hexagonal wurtzite phase samples an average crystallite size calculated Scherrer equation 38.22 nm 29.95 for mediated (PJZ) (CDZ) NPs respectively. Williamson-Hall modified form uniform deformation model (UDM), stress (USDM) energy-density (UDEDM) determine micro-strain ZnO nanomaterials. Tauc’s plot method revealed energy gap value 2.86 eV PJZ sample 2.95 CDZ due quantum confinement effect. FTIR spectra recorded ascertain biomolecules involved green synthesis. PL showed a strong UV emission peak around 370 visible broad band at 554 which is singly ionized oxygen vacancies. An effective prepare nanomaterials efficient antioxidant potential reported this study. current has also demonstrated that small particle responsible significant antibacterial activity against both gram-positive gram-negative bacteria.

Язык: Английский

Процитировано

0
Facile in situ synthesis of ZnO-infused caseinate/carboxymethyl cellulose films with antibacterial properties for cheddar cheese packaging DOI Creative Commons
Bai Qu,

Zhenlei Xiao,

Yangchao Luo

и другие.

Carbohydrate Polymer Technologies and Applications, Год журнала: 2025, Номер unknown, С. 100779 - 100779

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0
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

и другие.

International Journal of Molecular Sciences, Год журнала: 2024, Номер 25(21), С. 11621 - 11621

Опубликована: Окт. 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.

Язык: Английский

Процитировано

2