Effect of annealing temperatures on the structural and optical properties of zinc oxide nanoparticles prepared by chemical precipitation method

Goswami, Monalisha; Adhikary, Nirab C.; Bhattacharjee, Suparna

doi:10.1016/j.ijleo.2017.12.174

Cited by 110 publications

(45 citation statements)

References 42 publications

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“…For all ZnO-NPs samples, wide and strong characteristic zinc oxide absorption bands with stretching modes of ZneO appear around 460 cm À1 to 490 cm À1 (Fig. 6cef) [36]. Wide peaks around 1000 cm À1 and 1400 cm À1 are most likely related to C]O absorption bands due to atmospheric carbon dioxide (CO 2 ) in the air [40,41].…”

Section: Fourier Transform Infrared Spectroscopy Studymentioning

confidence: 95%

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Cytotoxicity and antibacterial activities of plant-mediated synthesized zinc oxide (ZnO) nanoparticles using Punica granatum (pomegranate) fruit peels extract

Sukri

Shameli

Wong

et al. 2019

Journal of Molecular Structure

179

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The unique properties of zinc oxide nanoparticles (ZnO-NPs) produced using plant extract make them attractive for use in medical as well as industrial applications, and it is necessary to develop environmentally friendly methods for their synthesis. This can be accomplished by replacing the traditional chemical compounds for the reduction of the zinc ions to ZnO-NPs during synthesis with natural plant extracts. Here, the biosynthesis of ZnO-NPs using Punica granatum (P. granatum) fruit peels extract was investigated as the reducing and stabilizing agent. The P. granatum/ZnO-NPs with spherical and hexagonal shapes were biosynthesized at different annealing temperatures. The X-ray diffraction analysis confirmed the synthesis of highly pure ZnO-NPs with increasing crystallinity in higher annealing temperatures. The ZnO-NPs displayed characteristic absorption peaks between 370 and 378 nm in the UV evis spectra. Transmission electron microscopy (TEM) imaging showed the formation of mostly spherical and hexagonal-shaped ZnO-NPs in the mean size of 32.98 nm and 81.84 nm at 600 C and 700 C respectively. According to FTIR spectrum, strong absorption bands in the range of 462e487 cm À1 corresponding to ZneO bond stretching can be seen. Antibacterial activities of P. granatum/ZnO-NPs against Escherichia coli (E. coli) and Enterococcus faecalis (E. faecalis) were investigated and compared. Results obtained show that smaller-sized P. granatum/ZnO-NPs are more effective in inhibiting growth of both bacteria. In addition, cytotoxicity assays were performed for P. granatum/ZnO-NPs against human colon normal and cancerous cells. P. granatum/ZnO-NPs exhibited similar killing activities of both cell lines at the concentration of !31.25 mg/mL. The biosynthesized ZnO-NPs could offer potential applications in biomedical field.

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Section: Fourier Transform Infrared Spectroscopy Studymentioning

confidence: 95%

“…6. FTIR spectra of (a) P. granatum peel powder, (b) dried gel of P. granatum/Zn(NO 3 ) 3 .H 2 O, and P. granatum/ZnO-NPs annealed at (c) 400 C: S1, (d) 500 C: S2, (e) 600 C: S3, (f) lattice positions leading to re-crystallization process, reducing defects [36].…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

Cytotoxicity and antibacterial activities of plant-mediated synthesized zinc oxide (ZnO) nanoparticles using Punica granatum (pomegranate) fruit peels extract

Sukri

Shameli

Wong

et al. 2019

Journal of Molecular Structure

179

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“…Zinc oxide is the most promising inorganic oxides that are extensively used owing to its suitable magnetic, electrical and optical properties. ZnO, as a semiconductor, is abundant in its three forms: hexagonal wurtzite, rock salt and cubic structures [ 14 ]. Among them, wurtzite has a direct bandgap energy of 3.40 EV [ 15 ]; thus, it is transparent in the visible region with most activity occurring in the UV/blue region.…”

Section: Introductionmentioning

confidence: 99%

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

et al. 2020

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Nanoparticles (NPs) have unique properties compared to their bulk counterparts, and they have potentials for various applications in many fields of life science. Green-synthesized NPs have garnered considerable interest due to their inherent features such as rapidity, eco-friendliness and cost-effectiveness. Zinc oxide nanoparticles (ZnO NPs) were synthesized using an aqueous extract of Kalanchoe blossfeldiana as a reducing agent. The resulting nanoparticles were characterized via X-ray diffraction (XRD), dynamic light scattering (DLS), UV-Vis spectroscopy, photoluminescence (PL), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The antimicrobial potential of the synthesized ZnO NPs against bacterial and fungal strains was examined by the disk diffusion method, and they showed a promising antibacterial and antifungal potential. The catalytic activity of the synthesized ZnO NPs in reducing methylene blue (MB) and eosin was studied via UV-Vis spectroscopy. The decolorization percentages of the MB and Eosin Y dyes were 84% and 94%, respectively, which indicate an efficient degradation of the ZnO NPs. In addition, the cytotoxic activity of the ZnO NPs on the HeLa cell line was evaluated via in vitro assay. The MTT assay results demonstrate a potent cytotoxic effect of the ZnO NPs against the HeLa cancer cell line.

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“…Annealing is an effective post‐growth technique to stabilize Mn at energetically favorable sites. [ 26,27 ] Melting point of ZnO is ≈2000 °C and re‐crystallization would typically occur at ≈1400 °C. Higher temperatures could decompose the thin films.…”

Section: Mocvd Growth Of Znmnomentioning

confidence: 99%

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

Saravade

Manzoor

Corda

et al. 2021

Advanced Optical Materials

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This systematic study investigates the optical properties and process−structure−property relationships of Mn‐doped zinc oxide (ZnMnO) grown by metal‐organic chemical vapor deposition with varying Mn‐doping concentration and growth conditions. ZnMnO exhibits a good crystal quality oriented in the (002) direction and contains intermixtures of zinc oxide (ZnO)‐like and manganese oxide (MnxOy)‐like phases. The material exhibits a direct energy absorption band‐edge and a reduction in bandgap with Mn‐doping. Photoluminescence studies show that Mn‐doping can simultaneously tailor broad green band luminescence and ultraviolet edge emissions. Post‐growth air‐annealing results in broad MnxOy‐related photoluminescence emissions at 3.3–4.5 eV. A further reduction in the absorption band‐edge is also observed with annealing. Results indicate that luminescence wavelengths and intensities, and absorption band‐edge can be tuned with the Mn‐doping process. This paper promotes a thorough understanding of defect centers in ZnO with transition metal doping and their interrelation with optical characteristics. The work provides a solid foundation for the development of optoelectronic devices, such as light emitting diodes, solar cells, lasers, and photodetectors using ZnO‐based materials.

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Effect of annealing temperatures on the structural and optical properties of zinc oxide nanoparticles prepared by chemical precipitation method

Cited by 110 publications

References 42 publications

Cytotoxicity and antibacterial activities of plant-mediated synthesized zinc oxide (ZnO) nanoparticles using Punica granatum (pomegranate) fruit peels extract

Cytotoxicity and antibacterial activities of plant-mediated synthesized zinc oxide (ZnO) nanoparticles using Punica granatum (pomegranate) fruit peels extract

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

Optical and Structural Properties of Manganese‐Doped Zinc Oxide Grown by Metal‐Organic Chemical Vapor Deposition

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