Effect of Ni-doping on the structural, optical and magnetic properties of ZnO nanoparticles by solvothermal method

Guruvammal, D.; Selvaraj, S.; Sundar, S. Meenakshi

doi:10.1016/j.jallcom.2016.05.038

Cited by 72 publications

(18 citation statements)

References 44 publications

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“…Figure 1 shows the XRD powder pattern of ZnO, ZnO-Al and ZnO-Ni compared with PDF files of hexagonal (00-0361451) reported phases for ZnO. Diffraction peak characteristics correspond to the hexagonal wurtzite structure of pure ZnO in both doped samples with a preferential orientation along the (101) plane in every sample, as reported by Guruvammal et al [20]. The insert in Figure 1 shows the main peaks (101), (002) and (101), where we can observe a shift towards lower angles and decreased intensity peaks due to an increased microstrain Ashokkumar [21] in doping ions Al 3+ and Ni 2+ .…”

Section: Structure From Xrd Patterns and Raman Spectrasupporting

confidence: 52%

Synthesis of Nanocrystalline-Doped ZnO with Al3+ and Ni2+ by Sol-Gel Method Coupled by Ultrasound Irradiation

Robles-Águila¹,

Luna-López²,

Luz³

et al. 2018

Preprint

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Section: Structure From Xrd Patterns and Raman Spectrasupporting

confidence: 52%

Synthesis of Nanocrystalline-Doped ZnO with Al3+ and Ni2+ by Sol-Gel Method Coupled by Ultrasound Irradiation

Robles-Águila¹,

Luna-López²,

Luz³

et al. 2018

Preprint

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“…Figure 1 shows the XRD powder patterns of ZnO, ZnO-Al, and ZnO-Ni compared with PDF files of hexagonal (00-0361451) reported phases for ZnO. Diffraction peak characteristics correspond to the hexagonal wurtzite structure of ZnO in both doped samples with a preferential orientation along the (101) plane in every sample, as reported by Guruvammal et al [24]. The additional secondary phases of nickel oxides or aluminum oxides were observed, but the intensities of these phases were very low compared with those of ZnO.…”

Section: Characterizationmentioning

confidence: 52%

Synthesis and Characterization of Nanocrystalline ZnO Doped with Al3+ and Ni2+ by a Sol–Gel Method Coupled with Ultrasound Irradiation

et al. 2018

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Zinc oxide is one of the most important semiconducting metal oxides and one of the most promising n-type materials, but its practical use is limited because of both its high thermal conductivity and its low electrical conductivity. Numerous studies have shown that doping with metals in ZnO structures leads to the modification of the band gap energy. In this work, Al-doped ZnO, Ni-doped ZnO, and undoped ZnO nanocrystalline powders were prepared by a sol–gel method coupled with ultrasound irradiation, and the results show the influence of Al3+ and Ni2+ ions in the ZnO network. The doping concentrations in ZnO of 0.99 atom % for ZnO–Al and 0.80 atom % for ZnO–Ni were obtained by X-ray Fluorescence (XRF). X-ray Diffraction (XRD) and Raman Spectroscopy showed a decreased intensity and broadening of main peaks, indicating metallic ions. The crystallite size of the sample was decreased from 24.5 nm (ZnO) to 22.0 nm (ZnO–Al) and 21 nm (ZnO–Ni). The textural and morphological properties were analyzed via Nitrogen Adsorption (BET method) and Field Emission Scanning Electron Microscopy (FESEM).

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“…The M-H curves of the pure ZnO and Ni-doped ZnO nanoparticles, with up to 15 at.%, exhibited diamagnetic behaviour at a high magnetic field and weak ferromagnetic (FM) behaviour in the lowest field regime. Sundarsan et al [33] and Guruvammal et al [34] reported that the pure ZnO nanoparticles exhibited ferromagnetic nature at room temperature due to the exchange interaction between localized electron spin moments resulting from oxygen vacancies at the surface of nanoparticles. The existence of ferromagnetism in Zn 1-x Ni x O may be due to the clustering of metallic nickel for which intrinsic ferromagnetism rises from the charge carriers.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

Structural, morphological, magnetic and electrical properties of Ni-doped ZnO nanoparticles synthesized by co-precipitation method

Dasari

Godavarti

Mote³

2018

PAC

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Weak ferromagnetic behaviour was obtained in a systematic way at room temperature by doping of where x = 0.00, 0.05, 0.15 and 0.20). The obtained results were correlated with conductivity and impedance studies. Diamagnetic to ferromagnetic change was observed with increased concentration of nickel. X-ray diffraction analysis confirmed wurtzite ZnO structure of prepared nanopowders while microstrain was increased with nickel concentration. Incorporation of nickel in ZnO structure was confirmed using EDAX analysis, while FTIR spectroscopy provided further information on functional groups. Transmission electron microscopy images showed that the particle sizes are in the range of 12-20 nm, and scanning electron microscopy analyses that grain size decreases with increase in nickel concentration. Photo luminescence studies confirmed the presence of V O and Zn i defects in the prepared samples. It was concluded that the defect induced strain, grain boundaries and lower particle sizes are the reasons for weak ferromagnetic behaviour of the investigated samples.

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Effect of Ni-doping on the structural, optical and magnetic properties of ZnO nanoparticles by solvothermal method

Cited by 72 publications

References 44 publications

Synthesis of Nanocrystalline-Doped ZnO with Al<sup>3+</sup> and Ni<sup>2+</sup> by Sol-Gel Method Coupled by Ultrasound Irradiation

Synthesis of Nanocrystalline-Doped ZnO with Al<sup>3+</sup> and Ni<sup>2+</sup> by Sol-Gel Method Coupled by Ultrasound Irradiation

Synthesis and Characterization of Nanocrystalline ZnO Doped with Al3+ and Ni2+ by a Sol–Gel Method Coupled with Ultrasound Irradiation

Structural, morphological, magnetic and electrical properties of Ni-doped ZnO nanoparticles synthesized by co-precipitation method

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