Zinc Oxide Nanoparticles for Water Purification.
Angela SpoialaCornelia Ioana IlieRoxana-Doina TrușcăOvidiu Cristian OpreaVasile Adrian SurduBogdan Ştefan VasileAnton FicaiDenisa FicaiEcaterina AndronescuLia Mara DițuPublished in: Materials (Basel, Switzerland) (2021)
In this study, zinc oxide nanoparticles were synthesized through a simple co-precipitation method starting from zinc acetate dihydrate and sodium hydroxide as reactants. The as-obtained ZnO nanoparticles were morphologically and structurally characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), photocatalytic activity, and by determining the antimicrobial activity against Gram-negative and Gram-positive bacteria. The XRD pattern of the zinc oxide nanoparticles showed the wurtzite hexagonal structure, and its purity highlighted that the crystallinity correlated with the presence of a single product, zinc oxide. The ZnO nanoparticles have an average crystallite size of 19 ± 11 nm, which is in accordance with the microscopic data. ZnO nanoparticles were tested against methyl orange, used as a model pollutant, and it was found that they exhibit strong photocatalytic activity against this dye. The antibacterial activity of ZnO nanoparticles was tested against Gram-negative and Gram-positive strains (Escherichia coli, Staphylococcus aureus, and Candida albicans). The strongest activity was found against Gram-positive bacteria (S. aureus).
Keyphrases
- oxide nanoparticles
- gram negative
- electron microscopy
- multidrug resistant
- visible light
- reduced graphene oxide
- candida albicans
- escherichia coli
- room temperature
- quantum dots
- biofilm formation
- staphylococcus aureus
- klebsiella pneumoniae
- magnetic resonance imaging
- machine learning
- high resolution
- light emitting
- computed tomography
- mass spectrometry
- magnetic resonance
- ionic liquid
- crystal structure