Zinc Oxide Nanoparticles for Water Purification.

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Zinc oxide nanoparticles (ZnO NPs) are recognized for their versatile properties.
• Investigating novel synthesis methods for ZnO NPs is crucial for advanced applications.
• Understanding the photocatalytic and antimicrobial potential of ZnO NPs is of significant interest.

Purpose of the Study:

• To synthesize zinc oxide nanoparticles (ZnO NPs) via a straightforward co-precipitation method.
• To characterize the synthesized ZnO NPs for their structural, morphological, photocatalytic, and antimicrobial properties.
• To evaluate the efficacy of ZnO NPs as a photocatalyst and antibacterial agent.

Main Methods:

• Co-precipitation synthesis using zinc acetate dihydrate and sodium hydroxide.
• Characterization using Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM).
• Assessment of photocatalytic activity against methyl orange and antibacterial activity against *Escherichia coli*, *Staphylococcus aureus*, and *Candida albicans*.

Main Results:

• The synthesized ZnO NPs exhibited a pure wurtzite hexagonal crystalline structure with an average crystallite size of 19 ± 11 nm.
• ZnO NPs demonstrated significant photocatalytic degradation of methyl orange.
• The nanoparticles showed notable antibacterial activity, with the strongest effect observed against *Staphylococcus aureus*.

Conclusions:

• The co-precipitation method effectively produced pure ZnO nanoparticles with wurtzite hexagonal structure.
• The synthesized ZnO nanoparticles possess promising photocatalytic and broad-spectrum antibacterial properties.
• These findings suggest potential applications for ZnO nanoparticles in environmental remediation and antimicrobial treatments.