Limits...
Construction of Zinc Oxide into Different Morphological Structures to Be Utilized as Antimicrobial Agent against Multidrug Resistant Bacteria.

Elkady MF, Shokry Hassan H, Hafez EE, Fouad A - Bioinorg Chem Appl (2015)

Bottom Line: Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques.The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g.Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

View Article: PubMed Central - PubMed

Affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications, Alexandria 21934, Egypt ; Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt.

ABSTRACT
Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques. The variation of the different preparation parameters such as reaction temperature, time, and stabilizer agents was optimized to attain different morphological structures. The influence of the microwave annealing process on ZnO crystallinity, surface area, and morphological structure was monitored using XRD, BET, and SEM techniques, respectively. The antimicrobial activity of zinc oxide produced in nanotubes structure was examined against four different multidrug resistant bacteria: Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains. The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g. The minimum inhibitory concentration (MIC) of ZnO nanotubes showed that the low concentrations of ZnO nanotubes could be a substitution for the commercial antibiotics when approached in suitable formula. Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

No MeSH data available.


Related in: MedlinePlus

XRD patterns for ZnO nanopowders via sol-gel technique with different surfactant agents: (A) PVP, (B) PVA, (C) CTAB, (D) TEA, and (E) PEG.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4588359&req=5

fig2: XRD patterns for ZnO nanopowders via sol-gel technique with different surfactant agents: (A) PVP, (B) PVA, (C) CTAB, (D) TEA, and (E) PEG.

Mentions: (i) Crystalline Structure (XRD). The X-ray diffraction patterns of the nanocrystalline phases of the prepared zinc oxide nanopowder using different surfactant agents were compared with the zinc oxide wurtzite phase (JCPDS card number 01-089-1397). It was indicated from Figure 2 that all the prepared ZnO samples using the different surfactant agents showed wurtzite crystal structure with high intensity. Figure 2 illustrates both the 2θ values for reference wurtzite phase (JCPDS card number 01-089-1397; a = 0.3253 nm, c = 0.5213 nm, and u = 1.6025) and the measured 2θ values for the different synthesized ZnO nanopowders in the presence of different surfactants. The sharp peaks indicate that the products are well crystallized and oriented [23]. All the diffraction peaks can be well indexed to the hexagonal phase of ZnO reported in JCPDS card number 01-089-1397 and no other characteristic peaks are observed [24, 25].


Construction of Zinc Oxide into Different Morphological Structures to Be Utilized as Antimicrobial Agent against Multidrug Resistant Bacteria.

Elkady MF, Shokry Hassan H, Hafez EE, Fouad A - Bioinorg Chem Appl (2015)

XRD patterns for ZnO nanopowders via sol-gel technique with different surfactant agents: (A) PVP, (B) PVA, (C) CTAB, (D) TEA, and (E) PEG.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4588359&req=5

fig2: XRD patterns for ZnO nanopowders via sol-gel technique with different surfactant agents: (A) PVP, (B) PVA, (C) CTAB, (D) TEA, and (E) PEG.
Mentions: (i) Crystalline Structure (XRD). The X-ray diffraction patterns of the nanocrystalline phases of the prepared zinc oxide nanopowder using different surfactant agents were compared with the zinc oxide wurtzite phase (JCPDS card number 01-089-1397). It was indicated from Figure 2 that all the prepared ZnO samples using the different surfactant agents showed wurtzite crystal structure with high intensity. Figure 2 illustrates both the 2θ values for reference wurtzite phase (JCPDS card number 01-089-1397; a = 0.3253 nm, c = 0.5213 nm, and u = 1.6025) and the measured 2θ values for the different synthesized ZnO nanopowders in the presence of different surfactants. The sharp peaks indicate that the products are well crystallized and oriented [23]. All the diffraction peaks can be well indexed to the hexagonal phase of ZnO reported in JCPDS card number 01-089-1397 and no other characteristic peaks are observed [24, 25].

Bottom Line: Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques.The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g.Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

View Article: PubMed Central - PubMed

Affiliation: Fabrication Technology Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications, Alexandria 21934, Egypt ; Chemical and Petrochemical Engineering Department, Egypt-Japan University of Science and Technology, New Borg El-Arab City, Alexandria 21934, Egypt.

ABSTRACT
Nano-ZnO has been successfully implemented in particles, rods, and tubes nanostructures via sol-gel and hydrothermal techniques. The variation of the different preparation parameters such as reaction temperature, time, and stabilizer agents was optimized to attain different morphological structures. The influence of the microwave annealing process on ZnO crystallinity, surface area, and morphological structure was monitored using XRD, BET, and SEM techniques, respectively. The antimicrobial activity of zinc oxide produced in nanotubes structure was examined against four different multidrug resistant bacteria: Gram-positive (Staphylococcus aureus and Bacillus subtilis) and Gram-negative (Escherichia coli and Pseudomonas aeruginosa) strains. The activity of produced nano-ZnO was determined by disc diffusion technique and the results revealed that ZnO nanotubes recorded high activity against the studied strains due to their high surface area equivalent to 17.8 m(2)/g. The minimum inhibitory concentration (MIC) of ZnO nanotubes showed that the low concentrations of ZnO nanotubes could be a substitution for the commercial antibiotics when approached in suitable formula. Although the annealing process of ZnO improves the degree of material crystallinity, however, it declines its surface area and consequently its antimicrobial activity.

No MeSH data available.


Related in: MedlinePlus