Microwave-Assisted ZrO2 Nanoparticles and Its Photocatalytic and Antibacterial Studies
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ZrO2 nanoparticles were prepared by the microwave-assisted method. XRD, FTIR, FESEM with EDS, TEM, UV–Vis, and photoluminescence were used for the characterization of ZrO2 nanoparticles. XRD exhibits cubic structure with an average crystallite size of 12 nm. FESEM and TEM images confirm the nanoparticles with an average particle size of 35 nm. From FTIR results, the characteristic vibrational band (Zr–O) is observed at 735 cm−1. The optical bandgap of the microwave-assisted ZrO2 nanoparticles is found to be 4.42 eV. The photoluminescence spectrum of ZrO2 nanoparticles showed blue, green and orange emissions. The photocatalytic degradation study of ZrO2 nanoparticles was investigated against the Methylene Blue (MB) and Rose Bengal (RB) dyes under UV light irradiation. Microwave-assisted ZrO2 nanoparticles showed an excellent photocatalytic activity (MB and RB dye) monitored by using UV–Vis spectrophotometer. Antibacterial activity (disc diffusion method) of microwave-assisted ZrO2 nanoparticles was studied against foodborne pathogens. Furthermore, microwave-assisted ZrO2 nanoparticles will be applicable to wastewater remediation and pharmaceutical applications.
KeywordsMicrowave-assisted method Photoluminescence Photocatalytic Antibacterial activities
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