Green synthesis of ZnO and Mg doped ZnO nanoparticles, and its optical properties

Umaralikhan, L.; Jaffar, M. Jamal Mohamed

doi:10.1007/s10854-017-6461-1

Cited by 71 publications

(29 citation statements)

References 33 publications

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“…where D-is the size in nanometers, λ is the wavelength of the radiation (1.5406Å for CuKα), k is a constant (0.94), βD-is the peak width at halfmaximum intensity and θ is the peak position. The ZnO and Mg doped ZnO NPs average particle sizes are 42 nm and 33 nm respectively [3]. The Mg doped ZnO NPs particle size decrease as compared to that of ZnO NPs, the reduction in the particle size is mainly due to the distortion in the host ZnO lattice by Mg 2+ ion, which decrease the nucleation and subsequent growth rate of the ZnO NPs.…”

Section: Resultsmentioning

confidence: 96%

“…Photoluminescence measurement was carried out on a luminescence spectrophotometer (PerkinElmer LS-5513, Perkin Elmer Instrument, USA) using xenon lamp as the excitation source at room temperature [3].…”

Section: Characterization Techniquesmentioning

confidence: 99%

“…To estimate the particles size using X-ray powder diffraction measurements, the Scherer's formula is the simplest method to calculate was reported in our earlier paper [3].…”

Section: Introductionmentioning

confidence: 99%

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Williamson-Hall analysis of ZnO and Mg doped ZnO nanoparticles prepared via Psidium guajava leaf extract

Umaralikhan¹,

Jaffar²

2020

JARJ

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ZnO and Mg doped ZnO nanoparticles (NPs) were synthesized by green method using Psidium guajava leaf extract. X-ray power diffraction studies confirmed that, synthesized nanoparticles were retained the wurtzite hexagonal structure. In addition, the crystallite development in nanostructured ZnO and Mg doped ZnO NPs by X-ray peak broadening analysis. The individual contributions of small crystallite sizes and lattice strain to the peak broadening in pure and Mg doped ZnO NPs were studied using Williamson-Hall (W-H) analysis.

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Section: Resultsmentioning

confidence: 96%

Section: Characterization Techniquesmentioning

confidence: 99%

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Williamson-Hall analysis of ZnO and Mg doped ZnO nanoparticles prepared via Psidium guajava leaf extract

Umaralikhan¹,

Jaffar²

2020

JARJ

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“…As the size of the material becomes smaller and the band gap becomes larger, this changes the optical and electrical properties of the material, making it suitable for new applications and devices. Among them, the widely accepted method to modify the electrical and optical properties of a semiconductor is the addition of impurity atoms, or doping 16,17 .…”

Section: Research Articlementioning

confidence: 99%

Synthesis and Characterization of Various Metal Ions Doped CeO2 Nanoparticles Derived from the Azadirachta Indica Leaf Extracts

2017

Chem Sci Trans

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Abstract:The cerium oxide nanoparticles (CeO 2 NPs) and M 2+ doped CeO 2 NPs (M 2+ = Zn 2+ , Ni 2+ , Cu 2+ and Co 2+ ) were prepared through the Azadirachta indica (A. indica) leaf extracts. The x-ray diffraction studies confirmed that synthesized pure and M 2+ doped CeO 2 NPs were exhibited the cubic structure. The FESEM and TEM images of both pure and M 2+ doped CeO 2 NPs have exhibited spherical structure. From the EDAX spectral analysis, the elemental compositions were identified. The various functional groups were confirmed by FT-IR spectrum. Photoluminescence spectral analysis, small shift observed for emission of the CeO 2 NPs values as compared to that of the transition metal ions doped CeO 2 NPs emission values. The antimicrobial studies were performed against a set of gram positive (Staphylococcus aureus and Streptococcus pneumoniae) and gram negative (Escherichia coli, Pseudomonas aeruginosa, Proteus vulgaris, Klebsiella pneumonia and Shigelladysenteriae) bacterial and fungal candida albicans strain.

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“…Umaralikhan et al [11] described the different photoluminescence bands in Mg added ZnO because of the generation of Zn/Mg vacancies and surface defects. Nayaka et al [12] produced Mg doped ZnO nanoparticles in the size ranges from 60 to 90 nm.…”

Section: Introductionmentioning

confidence: 99%

Fine-tuning of energy gap, FTIR, photoluminescence and photocatalytic behavior of Centella asiatica extract mediated Mn/Mg doped ZnO nanostructure

Subbiah

Muthukumaran²,

Raja³

2019

J Mater Sci: Mater Electron

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Mn, Mg two element doped ZnO nanostructure derived from Centella asiatica leaf extract with Mn = 2% and Mg = 0, 2 and 4% were prepared by bio-synthesis method. Hexagonal structure of ZnO was maintained throughout the Mn/Mg doping without any additional phase. The derived XRD intensity ratio ((I 100 /I 002 ) was almost equal to one for Mg = 2% than other samples which signifies the tuning of size and shape towards the spherical size which was confirmed by electron microscopic images. The higher absorbance in UV and visible wavelengths at Mg = 4% is used to improve the light harvesting capacity and should increase the photocatalytic activity of composite samples. The tuning of energy gap by Mg doping is useful for the fabrication of opto-electronic devices. The presence of Zn-O-Mn/Mg local bond is confirmed by Fourier transform infra-red studies. The existing strong ultra-violet emission band and the visible blue and green emission bands were discussed based on electronic transition and intensity of defect centers. The elevated photocatalytic activity at Mg = 4% is due to the reduced energy gap (3.89 eV) than other samples and hence the higher absorption in the visible region and the creation of defect states.

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Green synthesis of ZnO and Mg doped ZnO nanoparticles, and its optical properties

Cited by 71 publications

References 33 publications

Williamson-Hall analysis of ZnO and Mg doped ZnO nanoparticles prepared via Psidium guajava leaf extract

Williamson-Hall analysis of ZnO and Mg doped ZnO nanoparticles prepared via Psidium guajava leaf extract

Synthesis and Characterization of Various Metal Ions Doped CeO2 Nanoparticles Derived from the Azadirachta Indica Leaf Extracts

Fine-tuning of energy gap, FTIR, photoluminescence and photocatalytic behavior of Centella asiatica extract mediated Mn/Mg doped ZnO nanostructure

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