Low Concentration Iron-Doped Alumina (Fe/Al2O3) Nanoparticles Using Co-Precipitation Method

Pure aluminum oxide (Al2O3) and iron-doped alumina Fe-doped Al2O3 with different percentages of Fe dopant nanoparticles (NPs) were synthesized by co-precipitation method. The XRD analysis indicated that the samples have γ, δ, θ, and α phases and the crystal structure became more stable with increasing Fe dopant. The results of the TEM analysis indicated that the particle size of the 4%-doped sample is about 45 nm. The results of FTIR analysis indicated an increase in the intensity of the Al-OH absorption with increasing of the Fe dopant. The UV-DRS optical analysis demonstrated that the band gap energy of the pure Al2O3 sample decreased from 4.1 to 3.51 eV for the sample with a 6% impurity. Finally, the VSM magnetic analysis showed the paramagnetic behavior of the Fe-doped alumina.