Biogenic synthesis of LaMnO₃ perovskite nanoparticles: enhanced photocatalytic activity for water purification

The LaMnO₃ nanoparticles were successfully produced using the solution combustion method followed by calcination at 500 °C. Various spectroscopic techniques were utilized to analyze the nanoparticles and verify their surface characteristics and structural properties. X-ray diffraction studies confirmed that the synthesized LaMnO₃ nanoparticles possessed an orthorhombic crystalline structure, with a crystallite size of 30 nm. The morphology of the LaMnO₃ nanoparticles was determined using scanning electron microscopy which are cube shape. Fourier transform infrared spectroscopy and energy dispersive spectroscopy were employed to identify the functional groups and elemental composition, respectively. Additionally, LaMnO₃ was employed as a photocatalyst for degrading methylene blue dye under visible light exposure, exhibiting high efficiency of 99% within 90 min of irradiation.