Synthesis, characterization of nanocrystalline ZnO via two different chemical methods and its antibacterial activity

Babu, L. Kiran; Sarala, E.; Audiseshaiah, O.; Reddy, K. M.; Reddy, Y. V. R.

doi:10.1016/j.surfin.2019.05.002

Cited by 20 publications

(4 citation statements)

References 47 publications

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“…The sharp peaks reflect the crystallinity of the prepared nanoparticles (El-Fadl et al, 2019). Figure 2 (a) peaks have been indexed to the wurtzite structure of ZnO having a hexagonal phase (Babu et al, 2019;Vijayakumar et al, 2020). Moreover, the absence of extra peaks in the ZnO NPs pattern ensures the high purity of the prepared nanoparticles, which is confirmed by implementing a refinement to the XRD pattern, performed on the MAUD program and shown in Figure 2 (c).…”

Section: Nanoparticles Characterizationmentioning

confidence: 75%

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

Shmait¹,

Ghouch²,

Boukhari³

et al. 2021

MAS

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ZnO and ZnAl2O4 nanoparticles (NPs) were successfully prepared by the co-precipitation method and characterized by x-ray powder diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy. The prepared NPs were incorporated into epoxy (EP) coating with mass ratios 200  800 mg/kg of ZnO NPs/EP and ZnAl2O4 NPs /EP. The prepared coatings were characterized by scanning electron microscopy and Fourier transform infrared spectroscopy, and their mechanical properties were investigated, at room temperature, after 5, 10, 15, and 20 days of preparation. Tensile tests showed an improvement in the tensile properties, with the best improvement in ultimate tensile strength (93.2%) for 800 mg/kg ZnAl2O4 NPs/EP coating after 15 days of preparation. The ZnO NPs/EP and ZnAl2O4 NPs/EP coatings exhibited noticeable sensitivity to the stretching rate. Vickers microhardness (Hv) investigations showed normal indentation size effect behavior for all the samples. The best improvement in Hv was attained after 5 days of preparation, for all coatings, with the best improvement (9.15%) for 700 mg/kg ZnO NPs/EP.

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Section: Nanoparticles Characterizationmentioning

confidence: 75%

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

Shmait¹,

Ghouch²,

Boukhari³

et al. 2021

MAS

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“…Generally, the antibacterial effect of ZnO NPs is due to the electronic charge, the small size, and the large surface–volume ratio that allows interactions with bacteria [ 77 ], and their capacity to generate reactive oxygen species (ROS), such as hydroxyl radicals (OH − ), superoxide anion (O 2 − ), and perhydroxyl (OOH) [ 78 ]. The ROS species are generated by the interaction between electrons or hole generated by the nanoparticles with the water or oxygen from the atmosphere [ 79 ].…”

Section: Resultsmentioning

confidence: 99%

Electrospun Nanosystems Based on PHBV and ZnO for Ecological Food Packaging

et al. 2021

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The electrospun nanosystems containing poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and 1 wt% Fe doped ZnO nanoparticles (NPs) (with the content of dopant in the range of 0–1 wt% Fe) deposited onto polylactic acid (PLA) film were prepared for food packaging application. They were investigated by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), antimicrobial analysis, and X-ray photoelectron spectrometry (XPS) techniques. Migration studies conducted in acetic acid 3% (wt/wt) and ethanol 10% (v/v) food simulants as well as by the use of treated ashes with 3% HNO3 solution reveal that the migration of Zn and Fe falls into the specific limits imposed by the legislation in force. Results indicated that the PLA/PHBV/ZnO:Fex electrospun nanosystems exhibit excellent antibacterial activity against the Pseudomonas aeruginosa (ATCC-27853) due to the generation of a larger amount of perhydroxyl (˙OOH) radicals as assessed using electron paramagnetic resonance (EPR) spectroscopy coupled with a spin trapping method.

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“…When combined with chitosan, the resultant thin film not only has the mechanical strength provided by chitosan, but also the bioactivity of bioglass, making it a perfect solution for bone tissue engineering. Zinc oxide (ZnO) is a multifunctional material that is widely used in various fields [ 22 ]. Its unique properties, such as high thermal stability, transparency, and biocompatibility, make it a suitable component for thin films.…”

Section: Introductionmentioning

confidence: 99%

In-Depth Characterization of Two Bioactive Coatings Obtained Using MAPLE on TiTaZrAg

Prodana,

Stoian,

Ionita

et al. 2024

Materials

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TiZrTaAg alloy is a remarkable material with exceptional properties, making it a unique choice among various industrial applications. In the present study, two types of bioactive coatings using MAPLE were obtained on a TiZrTaAg substrate. The base coating consisted in a mixture of chitosan and bioglass in which zinc oxide and graphene oxide were added. The samples were characterized in-depth through a varied choice of methods to provide a more complete picture of the two types of bioactive coating. The analysis included Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), ellipsometry, and micro-Raman. The Vickers hardness test was used to determine the hardness of the films and the penetration depth. Film adhesion forces were determined using atomic force microscopy (AFM). The corrosion rate was highlighted by polarization curves and by using electrochemical impedance spectroscopy (EIS). The performed tests revealed that the composite coatings improve the properties of the TiZrTaAg alloy, making them feasible for future use as scaffold materials or in implantology.

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Synthesis, characterization of nanocrystalline ZnO via two different chemical methods and its antibacterial activity

Cited by 20 publications

References 47 publications

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

A Comprehensive Study on the Effect of ZnO and ZnAl2O4 Nanoparticles on the Mechanical Properties of Epoxy Coating: Tensile and Hardness

Electrospun Nanosystems Based on PHBV and ZnO for Ecological Food Packaging

In-Depth Characterization of Two Bioactive Coatings Obtained Using MAPLE on TiTaZrAg

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