Structural and Morphological Properties of Undoped and Manganese Doped Hematite Nanoparticles Prepared by Ball Milling Method

Abstract

Hematite nanoparticles of undoped and manganese doped were synthesized from natural sand of Logas District Kuansing Regency Riau Province by ball milling method. Structural and morphological properties of these compounds were studied using X-Ray Diffractometer (XRD) and Scanning electron microscope (SEM) respectively. Crystalline structure, lattice parameters, morphologies of the synthesized compounds were studied and the results are discussed. X-ray diffraction (XRD) confirmed the presence of a hematite (α-Fe2O3) phase. Average crystallite size based on flections (1 0 4) for undoped and manganese doped magnetic iron oxide particles are 39.2 nm and 38.2 respectively. The intensity of (1 0 4) reflection is stronger for magnetic iron oxide synthesized for 60 hours than that of 2 step (60+60) hours ball milling. This indicates the product grown along (1 0 4) direction. The average crystallite size decreases when magnetic iron oxide is doped with 10% Mn as confirmed by SEM images.

Fabrication of TiO2 Spheres and a Visible Light Active α-Fe2O3/TiO2-Rutile/TiO2-Anatase Heterogeneous Photocatalyst from Natural Ilmenite

“…The diffraction peaks at 23.91, 33.32, 35.71, 40.71, 49.53, 54.14, 57.72, 62.54, and 63.93° correspond to the (012), (104), (110), (113), (024), (116), (018), (214), and (030) diffractions of pure hematite (α-Fe 2 O 3 ). , The compositional (changing the Fe/O ratio from 3:4 to 2:3) and structural modifications are both involved in the phase transformation from Fe 3 O 4 to α-Fe 2 O 3 . The process is called oxygen dissociation and can occur at temperatures starting from 700 to 1000 °C, but the exact temperature varies due to composition and oxygen partial pressure.…”