Lanthanum orthoferrite (LaFeO3) and lanthanum manganite (LaMnO3) are the important family of perovskite compound which intensively studied and explored due to its applications as functional materials, such as a fuel cell electrode, photocatalytic and gas sensor. The performance of functional materials is strongly depended on their structural properties. Here, we investigated the structure and vibrational of LaFe1-xMnxO3 (x = 0.05, 0.10, 0.15 and 0.20) perovskite materials prepared by sol-gel method. The structural and optical properties of the materials were characterized by X-Ray diffraction (XRD) spectroscopy, Fourier Transform Infra-red (FTIR) spectroscopy, Raman spectroscopy, and Ultraviolet-Visible (UV-Vis) spectroscopy. The analysis of the XRD pattern confirmed the single-phase orthorhombic structure (space group: Pnma) following by the decreasing of lattice parameters, crystallite size, and Fe/Mn - O bond distance with the increasing of Mn-content. The presence of the Fe/Mn -O -Fe/Mn bending and Fe/Mn -O stretching modes has been confirmed by FTIR and Raman investigation. The optical band gap energy was measured by UV-Vis DRS spectroscopy, which obtained in the range of 1.99-2.14 eV. The band gap energy decreases with the increase of Mn-content.
|Journal||IOP Conference Series: Materials Science and Engineering|
|Publication status||Published - 2020|
|Event||4th International Symposium on Current Progress in Functional Materials, ISCPFM 2019 - Bali, Indonesia|
Duration: 6 Nov 2019 → 7 Nov 2019