Structural and magnetic behavior of Ni/Mn co-doped ZnO nanoparticles prepared by co-precipitation method

Vijayaprasath, G.; Murugan, R.; Asaithambi, S.; Sakthivel, P.; Mahalingam, T.; Hayakawa, Y.; Ravi, G.

doi:10.1016/j.ceramint.2015.11.019

Cited by 97 publications

(23 citation statements)

References 42 publications

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“…Moreover, the small shift in the peak position in the doped sample may be attributed to the doping effect of metal ions. This behavior has also been reported for a study on Mn-doped ZnO [27,28]. The small absorption peak at 2900 cm −1 related to the -CH 2 stretching modes on the surface in all samples.…”

Section: Ftir Analysissupporting

confidence: 85%

Structure, microstructure, optical and photocatalytic properties of Mn-doped ZnO nanoparticles

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Yalçın

Özuğurlu

et al. 2020

Mater. Res. Express

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In this work, Zn 1−x Mn x O samples were synthesized by the hydrothermal method by varying the dopant ratio from x=0.01 to 0.05 with 0.01 increment. Structural, optical and photocatalytic properties of Mn-doped ZnO were analyzed based on their concentration dependence. Structural behavior of the nanoparticles was studied by X-ray diffraction technique and it was found that Zn 1−x Mn x O samples were hexagonal Wurtzite structure with no secondary phase. The effect of Mn element in Zn 1-x Mn x O composition was clarified by calculating lattice parameters, cell volumes, stress, microstrain, the locality of the atoms dislocation density, displacement of atoms and bond length. SEM images revealed random agglomeration. The band gap and Urbach energies of Zn 1−x Mn x O structures were determined and discussed. Different models were used to calculate refractive index and the refractive index was found in the range of 2.05-2.72. Mn-doped ZnO nanoparticles exhibited lower degradation rate constants (k=0.0004-0.0009 min −1 ) than that of pure ZnO (k=0.0014 min −1 ). Doping Mn increased the Urbach energy value.

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Section: Ftir Analysissupporting

confidence: 85%

Structure, microstructure, optical and photocatalytic properties of Mn-doped ZnO nanoparticles

Şenol

Yalçın

Özuğurlu

et al. 2020

Mater. Res. Express

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“…The intense peaks at the crystal faces (100), (002), (101), (102), (110) assure the emergence of hexagonal wurtzite structure (as shown in figure 5) which belong to the space group of P6 3mc (JCPDS card no. 36-1451) [18]. The bio-synthesized ZnO nano-particles show more acute diffraction peak value introducing the appearance of the high percentage of crystalline phases.…”

Section: Effect Analysis Of Neem Leaf Extractmentioning

confidence: 97%

Synthesis of ZnO nanoparticles by two different methods & comparison of their structural, antibacterial, photocatalytic and optical properties

et al. 2020

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In this work, two different methods (sol-gel and biosynthesis) were adopted for the synthesis of zinc oxide (ZnO) nanoparticles. The leaf extract of Azadirachta Indica (Neem) was utilized in the biosynthesis scheme. Structural, antibacterial, photocatalytic and optical performances of the two variants were analyzed. Both variants demonstrated a wurtzite hexagonal structure. The biosynthesized variant (25.97 nm) exhibited smaller particles than that of the sol-gel variant (33.20 nm). The morphological analysis revealed that most of the particles of the sol-gel variant remained within the range of 15 nm to 68 nm while for the biosynthesized variant the range was 10-70 nm. The antibacterial assessment was redacted by using the agar well diffusion method in which the bacteria medium was Escherichia coli O157: H7. The zone of inhibition of bacterial growth was higher in the biosynthesized variant (14.5 mm). The photocatalytic performances of the nanoparticles were determined through the degradation of methylene blue dye in which the biosynthesized variant provided better performance. The electron spin resonance (EPR) analysis revealed that the free OH·radicals were the primary active species for this degradation phenomenon. The absorption band of the sol-gel and biosynthesized variants were 363 nm and 356 nm respectively. The optical band gap energy of the biosynthesized variant (3.25 eV) was slightly higher than that of the sol-gel variant (3.23 eV). Nevertheless, the improved antibacterial and photocatalytic responses of the biosynthesized variants were obtained due to the higher rate of stabilization mechanism of the nanoparticles by the organic chemicals (terpenoids) present in the Neem leaf extract.

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“…Recently, zinc oxide (ZnO) being a member of II-VI group has attracted much attention due to its potential applications in diverse fields (Vijayaprasath et al, 2016;Kittilstved et al, 2006). For instance, ZnO with a direct wide-band gap (in bulk form, 3.37 eV at 300 K), large exciton binding energy (60 meV), remarkable piezoelectric, electro-optic properties, and great chemical stability, (Bappaditya et al, 2015;Dietl, 2007;Pearton et al, 2005) has received eminent attention for its electronic and photonic applications (Yildirimcan et al, 2016) such as photodetectors (Kind et al, 2002), photodiodes (Lee et al, 2002), light emitting diodes (Saito et al, 2002), surface acoustic wave filters (Emanetoglu et al, 1999), photonic crystals (Chen et al, 2000), optical modulator waveguides (Koch et al, 1995), room-temperature ultraviolent (UV) lasers (Huang et al, 2001), gas sensors (Mitra et al, 1998;Godavarti et al, 2017), and solar cells and flat panel displayers (Law et al, 2005;Martinson et al, 2007;Shoushtari et al, 2017;El-Hilo et al, 2009;Ellmer et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Effect of Nickel Concentration on Crystallographic Structure and Morphology of Zinc Oxide Nanopowders

Erat

Yıldırımcan

2019

Turkish Journal of Engineering

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In this study, we work on the effect of Ni doping on the crystallographic structure, morphology, and optical properties of ZnO nanoparticles. ZnO and Ni doped ZnO nanopowders were synthesized by sol-gel technique with different Ni concentration (5%, 10%, and 15%). The crystallographic structure was characterized by conventional X-ray Diffraction (XRD) technique. The results confirm that Ni doping does not change the single hexagonal phase existing in pure ZnO whereas in high Ni doping concentration (10% and 15%) causes to grow a secondary phase due to presence of NiO. FE-SEM, EDX, FTIR techniques are used for morphology, elemental, and chemical analyses of the samples. Optical properties of the samples are investigated by using UV-VIS spectrophotometer.

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Structural and magnetic behavior of Ni/Mn co-doped ZnO nanoparticles prepared by co-precipitation method

Cited by 97 publications

References 42 publications

Structure, microstructure, optical and photocatalytic properties of Mn-doped ZnO nanoparticles

Structure, microstructure, optical and photocatalytic properties of Mn-doped ZnO nanoparticles

Synthesis of ZnO nanoparticles by two different methods & comparison of their structural, antibacterial, photocatalytic and optical properties

Comparison of Effect of Nickel Concentration on Crystallographic Structure and Morphology of Zinc Oxide Nanopowders

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