Aim of present study is to understand the change in structural, magnetic, electrical, and optical properties as well as the thermal stability of hematite nanoparticles with variation in annealing temperature. Additionally its application for dye removal and in thrombolytic activity has also been explored. The α form of Fe 2 O 3 nanoparticles were synthesized by co-precipitation method followed by annealing for 5 h at different temperatures from 300 °C, 500 °C, and 700 °C. The formation and properties of α -Fe 2 O 3 were analyzed by using Powder x-ray Diffraction (PXRD), Dynamic Light Scattering (DLS), Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FTIR), Superconducting Quantum Interference Device magnetometer (SQUID), Thermo Gravimetric Analysis (TGA), Differential Scanning Calorimetry (DSC), DC electrical resistivity and Ultraviolet–Visible Spectroscopy). Results suggest that there is definite correlation of annealing temperature with grain size, crystallinity, electric and magnetic properties, optical band gap, purity level, and crystallization temperature of α -Fe 2 O 3 nanoparticle. The effectiveness of α -Fe 2 O 3 as a photocatalyst, as well as biocompatible material was also established.
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Sharma et al. (2019) studied this question.
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