Structural, magnetic and photoluminescence behavior of Ni/Fe doped ZnO nanostructures prepared by co-precipitation method

Structural, Optical, and Magnetic Properties of Pure and Ni–Fe-Codoped Zinc Oxide Nanoparticles Synthesized by a Sol–Gel Autocombustion Method

“…It is well-known that the radius of Fe 2+ ions is larger than that of Zn 2+ and Fe 3+ individually. 30,31 Table 1 shows that crystallite size was enhanced by simultaneous doping of Fe into Zn−Ni−O due to the replacement of Fe 2+ instead of Zn 2+ , and similar behavior was also observed by many authors. 13,17,22,26,29−34 The lattice parameters (a = b) of Zn The results indicate that all Fe and Ni ions are incorporated into the lattice of the host ZnO crystal.…”

“…In Figure a, a shoulder peak at the right side may also be observed in doped samples, which confirms the secondary phases of iron oxide (Fe 2 O 3 ) in the rhombohedral crystalline phase of hematite (standard card PDF 01-087-1165). In the previous studies, the same behavior of secondary phase presence was observed, and it is believed that the formation of secondary phase in the final product may be related to the large quantities of gases formed during combustion explosions. − …”

“…The inclusion of Fe into Zn 1−2x Ni x O (x = 0.01, 0.02, 0.03, and 0.04) diminishes the intensity of all the peaks and shifts the peak position which may be due to the disorder or defects generated by the addition of Fe 2+ ions in Zn−Ni−O sites. It is well-known that the radius of Fe 2+ ions is larger than that of Zn 2+ and Fe 3+ individually 30,31. Table1shows that crystallite size was enhanced by simultaneous doping of Fe into Zn−Ni−O due to the replacement of Fe 2+ instead of Zn 2+ , and similar behavior was also observed by many authors.13,17,22,26,29−34 The lattice parameters (a = b) of Zn1−2x Ni x Fe x O (x = 0.01, 0.02, 0.03, and 0.04) measured from XRD data varied from 3.2413 to 3.2357 Å and parameter c from 5.1903 to 5.1813 Å.…”

Green Synthesis of Metal-Doped ZnO Nanoparticles Using Bauhinia racemosa Lam. Extract and Evaluation of Their Photocatalysis and Biomedical Applications

“…It is confirmed that TM has been successfully incorporated into the ZnO lattice by the significant shifts toward the lower wavenumbers caused by M-doping in the bare ZnO nanoparticles. On the other hand, the wide absorption band noticed around 350 to 700 cm –1 describes the interactions between the M–O (Ni, Mn, and Co) and Zn–O bond vibration modes . Additionally, there are noticeable differences between the M-doped ZnO nanoparticles and pristine ZnO nanoparticle’s FT-IR spectral peak intensities.…”

“…On the other hand, the wide absorption band noticed around 350 to 700 cm −1 describes the interactions between the M−O (Ni, Mn, and Co) and Zn−O bond vibration modes. 48 Additionally, there are noticeable differences between the M-doped ZnO nanoparticles and pristine ZnO nanoparticle's FT-IR spectral peak intensities. The discrepancies in the crystal radii of the M-dopant (Ni, Mn, and Co) and those of the Zn ones are responsible for the change in the locations and intensities of the peaks.…”