Effect of annealing temperature on the morphology and antibacterial activity of Mg-doped zinc oxide nanorods

Gopinath Kasi, Karthika Viswanathan, Jongchul Seo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Herein, magnesium-doped zinc oxide nanorods (MgZnO NRs) were synthesized by the co-precipitation method and annealed at different temperatures in the range of 100–500 °C. The increase in the annealing temperature was found to influence both chemical and morphological structures of the MgZnO NRs: Ultraviolet–visible diffuse reflectance spectroscopy showed an increase in band gap with increase in the annealing temperature. Fourier-transform infrared spectra showed that two characteristic peaks at 487 cm−1 and 442 cm−1 corresponding to a weak Zn–O stretching initially decreased and then disappeared with increase in the annealing temperature. Moreover, the MgZnO NRs annealed at 100 °C had large crystallite size, high aspect ratio, and narrow edges. Remarkably, the MgZnO NRs annealed at 100 °C exhibited the highest antibacterial activity against both S. aureus and E. coli strains, attributed to the high aspect ratio and diffusion ability of the Zn2+ ions and large surface charge, crystallite size, and surface area. The MgZnO NRs annealed at the relatively low temperature of 100 °C could be easily produced commercially, in large quantities, and effectively used to prevent the growth of foodborne microbes in food packaging applications.

Original languageEnglish
Pages (from-to)3230-3238
Number of pages9
JournalCeramics International
Volume45
Issue number3
DOIs
Publication statusPublished - 2019 Feb 15

Fingerprint

Zinc Oxide
Zinc oxide
Nanorods
Magnesium
Annealing
Crystallite size
Aspect ratio
Temperature
Surface charge
Coprecipitation
Escherichia coli
Stretching
Packaging
Fourier transforms
Energy gap
Spectroscopy
Ions
Infrared radiation

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

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abstract = "Herein, magnesium-doped zinc oxide nanorods (MgZnO NRs) were synthesized by the co-precipitation method and annealed at different temperatures in the range of 100–500 °C. The increase in the annealing temperature was found to influence both chemical and morphological structures of the MgZnO NRs: Ultraviolet–visible diffuse reflectance spectroscopy showed an increase in band gap with increase in the annealing temperature. Fourier-transform infrared spectra showed that two characteristic peaks at 487 cm−1 and 442 cm−1 corresponding to a weak Zn–O stretching initially decreased and then disappeared with increase in the annealing temperature. Moreover, the MgZnO NRs annealed at 100 °C had large crystallite size, high aspect ratio, and narrow edges. Remarkably, the MgZnO NRs annealed at 100 °C exhibited the highest antibacterial activity against both S. aureus and E. coli strains, attributed to the high aspect ratio and diffusion ability of the Zn2+ ions and large surface charge, crystallite size, and surface area. The MgZnO NRs annealed at the relatively low temperature of 100 °C could be easily produced commercially, in large quantities, and effectively used to prevent the growth of foodborne microbes in food packaging applications.",
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Effect of annealing temperature on the morphology and antibacterial activity of Mg-doped zinc oxide nanorods. / Kasi, Gopinath; Viswanathan, Karthika; Seo, Jongchul.

In: Ceramics International, Vol. 45, No. 3, 15.02.2019, p. 3230-3238.

Research output: Contribution to journalArticle

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