Objective: Pure TiO2 and Fe3+-TiO2 nanoparticles have been prepared by a
simple hydrothermal method with different Fe3+ concentrations.
Method: The synthesized nanoparticles are analysed to determine its structural, optical,
morphological and compositional properties using X-ray diffraction, Raman, UV-DRS,
photoluminescence, Mossbauer, XPS, TEM and SEM/EDS. The EDS micrograph confirms
the existence of Fe3+
atoms in the TiO2
matrix with 0.85, 1.52 and 1.87 weight percent.
The crystallite size and band gap decrease with increasing Fe3+
average particle size obtained from TEM is 7-11 nm, in good agreement with XRD results.
Raman bands at 640 cm-1
, 517 cm-1
and 398 cm-1
further confirm pure phase anatase
in all samples. XPS results show the proper substitutions of a few sites of Ti4+
ions in the TiO2
Conclusion: The intensity of PL spectra for Fe3+
shows a gradual decrease in the
peak intensity with increasing Fe3+
concentration in TiO2
, and it indicates a lower recombination
rate as the Fe3+
ion concentration increases. These nanoparticles are further
studied for its photocatalytic activities using malachite green dye under UV, visible and