Structural, Optical and Antibacterial Activity of Pure and Cadmium Doped Zinc Oxide Nanoparticles

Jeyakumari, A.; Siva, P.; Pachamuthu, P.; Revathi, M.

doi:10.9790/4861-170020398104

Cited by 5 publications

(6 citation statements)

References 12 publications

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“…These are in agreement with the previously reported values of tin oxide nanoparticles [4]. The average crystallite size, L of the tin oxide nanopowder was calculated using the Scherrer formula [36] L = 0.9λ/βcosθ Where λ is the wavelength of the CuK α line, β is the full width half maximum of the peaks in the diffractogram and θ is the angle measured from the Diffractometer. The average crystallite size of the tin oxide nanopowder was calculated and the obtained value is15.93 nm.…”

Section: Resultssupporting

confidence: 87%

Optical, Dielectric and Structural Properties of SnO2 Nanoparticles Via Sol-Gel Method

Soumya

2023

J. Phys.: Conf. Ser.

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This paper discuss the optical parameters of tin oxide nanopowder prepared by the sol-gel method. Tin oxide nanopowder shows 81 % transmittance in the near IR region. In this region, tin oxide nanopowder shows the highest reflectance, 81 %. The optical band gap was 3.43 eV. The cut-off wavelength of the tin oxide nanopowder is 362.15 nm. The refractive index and the extinction coefficient of the tin oxide nanopowder were calculated. The real and imaginary values of dielectric constants were calculated and the real value of the dielectric constant is higher than the imaginary value of dielectric constants. The average crystallite size from the XRD pattern was 15.93 nm. FESEM analysis shows that the average particle size was 17.21 nm.

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Section: Resultssupporting

confidence: 87%

Optical, Dielectric and Structural Properties of SnO2 Nanoparticles Via Sol-Gel Method

Soumya

2023

J. Phys.: Conf. Ser.

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“…Similar trend in the decrease in strain is reported by [45]. This strain may be due to the lattice shift and shrinkage that was observed in the lattice parameters [46].…”

Section: Figure 13: Strain Versus Temperature For Zno Nanoparticlessupporting

confidence: 84%

“…The APF of bulk hexagonal ZnO materials is about 0.74 but, in this study, the APF was 0.75 which is more than the value of the bulk material. This is attributed to the size effect in the nanocrystallite samples [44].…”

Section: Figure 15: Apf Versus Temperatures For Zno Nanoparticlesmentioning

confidence: 99%

“…The observed trend in the dislocation density can be said to generally decrease as temperature increase irrespective of the rise in value at 200 °C. The decrease in the dislocation density signifies a decline in crystallography deformation, topological imperfection or irregularity [44], [24]. The lower values of dislocation density are attributed to the lower level of the defect and better crystalline quality of the ZnO sample at higher temperature.…”

Section: Dislocation Densitymentioning

confidence: 99%

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Temperature Dependence on Structural Properties of Liquid Phase Synthesized ZnO

Armah

Koffi

2023

Adv. Nan. Res.

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Transparent conducting oxide material, ZnO nanoparticles has been synthesized using inexpensive and eco-friendly synthesis procedures with less or environmental pollutants and no liquid waste products. The effect of the temperatures on the structural properties for the synthesized ZnO nanocrystals has been investigated. In this study, we report an easy, low-cost, re-producible method for synthesizing ZnO nanoparticles by means of the liquid phase method. The ZnO nanocrystals were synthesized using the wet chemical route and the effect of temperature variation on the structural properties of investigated synthesized using powder x-ray diffractogram (XRD). The temperatures for the synthesis were varied from 120 °C to 200 °C in steps of 20 °C. The results show that, during the first stage of the synthesis of ZnO (at 120 °C), the XRD diffraction pattern confirms the cubic structure of zinc peroxide and the XRD pattern of the samples obtained at temperatures of 140 °C, 160 °C, 180 °C and 200 °C were confirmed to be hexagonal (wurtzite) crystal structure of ZnO. The XRD diffraction patterns of the 140 °C and 160 °C samples show some impurity phases which were associated with the zinc acetate by-product which is a colloid complex of water and methyl succinate and were removed by evaporation as temperatures were increased to 180 °C and 200 °C respectively. As temperature increases, the peak of the diffractograms of the sample becomes sharper and narrow indicating a decrease in width. A shift in peak positions to higher angles was observed and the positional parameter, bond angle, β, average crystallite size, APF, number of unit cells and density generally increase with temperature. However, the lattice parameters ‘a’ and ‘c’, bond lengths b and b1, bond angle, α, dislocation density, strain and unit cell volume were found to generally decrease with temperature.

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“…It has been proven that, for an ordered packing of spheres, representing spherical atoms or ions, which is conveniently used to describe the structure of many crystals upon which the earliest sets of atomic radii were derived, the process must result in equally densest packing of the spheres. At this densest packing of atoms, the fraction of the total volume occupied by the atoms when they touch each other is expected to be approximately 0.74 while the minimum is 0.34 [22][30][39] [40]. Thus, the packing efficiency or APF of spheres is 0.74 in the most compact arrangement, which is the highest possible for the packing of equal spheres as in bulk hexagonal ZnO.…”

Section: Figure 15mentioning

confidence: 99%

Structural Properties of Mn Doped ZnO Nanocrystallites Using Wet Chemical Synthesis

Nii Abekah Akwetey Armah,

Huvert Azoda Koffi

2023

NUST J. Eng. Sci.

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To get the required electrical, magnetic, structural and optical properties, materials are required to be doped with suitable impurities. The use of transition metals as a dopant in ZnO has been investigated to determine how they alter the various properties. Several research concerning the synthesis of TM-doped ZnO via various methods with the solubility limit of TM elements in ZnO has been reported. The distribution of the TMs into the ZnO matrix has been reported with divergent views. In this work, Mn doped ZnO nanoparticles has been synthesized by means of reasonable and ecologically friendly procedure by means of the liquid phase method with fewer conservational contaminants and no leftover products. The influence of the dopant on the structural properties of the produced ZnO nanocrystals was scrutinized using powder x-ray diffractogram (XRD). The Mn-doping concentration, x, was varied ( ) at temperatures of 180°C and 200 °C. Results of the lattice parameters, bond length, bond angles, crystallite size, strain, volume of unit cell, APF, number of unit cells, specific surface area and the density of the Mn-doped ZnO nanocrystal samples were be irregular in nature and not following a particular trend as the doping concentration increases. This variation in the values were due to the irregular values of the interplanar spacing and the observed variations in the shift of the peak angles as a result of the difference in ionic radii between Zn and Mn ions with Mn having multiple ionic radii since all the parameters are directly dependent on the value of the 2θ.

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Structural, Optical and Antibacterial Activity of Pure and Cadmium Doped Zinc Oxide Nanoparticles

Cited by 5 publications

References 12 publications

Optical, Dielectric and Structural Properties of SnO2 Nanoparticles Via Sol-Gel Method

Optical, Dielectric and Structural Properties of SnO2 Nanoparticles Via Sol-Gel Method

Temperature Dependence on Structural Properties of Liquid Phase Synthesized ZnO

Structural Properties of Mn Doped ZnO Nanocrystallites Using Wet Chemical Synthesis

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