Structural and Optical Properties of Ca2Mn2O6 Double Perovskite: Insights into its Potential for Photocatalytic Applications
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Calcium manganite double perovskite, Ca 2 Mn 2 O 6, was synthesized by a solid-state method to explore its photocatalytic potential, governed by the Mn 4+ / Mn 3+ redox couple. The structural and phase characteristics were analyzed using X-ray diffraction (XRD), Raman, and Fourier transform infrared (FTIR) spectroscopies. Raman analysis confirmed the existence of Jahn–Teller distortions in the lattice arising from Mn 3+ and Mn 4+ ions, suggesting the presence of tensile strain in the material. Additionally, infrared spectra identified the functional groups in the material, showing a Mn–O stretching vibration at 525 cm –1 and a Mn–O–Mn bending vibration at 479 cm –1 . Optical investigations through UV–vis spectroscopy revealed a higher Urbach energy, further confirmed by photoluminescence (PL) emissions in the visible region, which were associated with defect states. A low optical band gap of 2.50 eV was observed, enhancing photocatalytic activity under white-light irradiation due to the strong oxidizing power of photogenerated holes. Additionally, magnetic studies confirmed the paramagnetic characteristics of Ca 2 Mn 2 O 6, attributed to transition metal Mn ions in the structure. Compared with previously studied calcium manganese oxides, Ca 2 Mn 2 O 6 exhibits unique structural and optical properties, making it a viable option for photocatalytic and energy-related applications.
Source: ACS Omega
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,935
OpenAlex ID: W4413909435