Photocatalytic, optical and magnetic properties of Fe-doped ZnO nanoparticles prepared by chemical route

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

“…One could argue that Fe doping is a successful way of spin injection into CdO to obtain DMS of small size with extraordinary magnetic properties. The obtained value of magnetization here is superior to those reported for Mn-doped CdO (Kumar et al 2015), Co-doped CdO (Ahmad et al 2014), Fe-doped CdS (Kaur and Verma 2015) and Fe-doped ZnO (Kumar et al 2014). The colossal compositional variation of Hc as reflected from the anisotropy with the large value of room temperature coercivity recommend the use of this type of magnetic nanoparticles as pinning layer in spin valves demanding difficult and large demagnetizing field.…”

Enhanced Photocatalytic Activity of Iron-Doped ZnO Nanowires for Water Purification

“…2017, 7, 1185 7 of 11 [17] In fact, the Fe-doping of ZnO NWs allows the substitution of a few Zn atoms by Fe atoms, resulting in the creation of other energy levels above VB and below CB of ZnO (Figure 7) [18], leading to a reduction of the gap, then allowing the semiconductor to harvest more photons during the photocatalysis process. In addition, the introduction of iron leads to the formation of additional defects in the ZnO crystal lattice [19], which can become electron traps, reduces the recombination probability of the electron-hole pairs and leads to an acceleration of the formation of hydroxyl radicals. Thus, the photocatalytic efficiency of ZnO will be improved and, consequently, the photodegradation rate of the dyes will be increased according to the reactions below: In fact, the Fe-doping of ZnO NWs allows the substitution of a few Zn atoms by Fe atoms, resulting in the creation of other energy levels above VB and below CB of ZnO (Figure 7) [18], leading to a reduction of the gap, then allowing the semiconductor to harvest more photons during the photocatalysis process.…”

“…Thus, the photocatalytic efficiency of ZnO will be improved and, consequently, the photodegradation rate of the dyes will be increased according to the reactions below: In fact, the Fe-doping of ZnO NWs allows the substitution of a few Zn atoms by Fe atoms, resulting in the creation of other energy levels above VB and below CB of ZnO (Figure 7) [18], leading to a reduction of the gap, then allowing the semiconductor to harvest more photons during the photocatalysis process. In addition, the introduction of iron leads to the formation of additional defects in the ZnO crystal lattice [19], which can become electron traps, reduces the recombination probability of the electron-hole pairs and leads to an acceleration of the formation of hydroxyl radicals. Thus, the photocatalytic efficiency of ZnO will be improved and, consequently, the photo-degradation rate of the dyes will be increased according to the reactions below:…”

“…In addition, the introduction of iron leads to the formation of additional defects in the ZnO crystal lattice [19], which can become electron traps, reduces the recombination probability of the electron-hole pairs and leads to an acceleration of the formation of hydroxyl radicals. Thus, the photocatalytic efficiency of ZnO will be improved and, consequently, the photodegradation rate of the dyes will be increased according to the reactions below:…”

Tuning the magnetic behavior and improving the antibacterial efficiency of ZnO nanopowders through Zr+Fe doping for biomedical applications

“…The considerable population of point defects such as oxygen vacancies, zinc vacancies and zinc interstitials may play a crucial role in inducing the ferromagnetic properties in the synthesized doped samples by binding the spins of magnetic ions to form bound magnetic polarons [32]. As evidenced from the PL spectra, the concentration of oxygen vacancies increases with the Fe doping level which gives rise to the paramagnetic behavior [33].…”