Synthesis, Characterization and Photocatalytic Properties of (Bi0.6K0.2Ba0.2FeO3) Perovskite-Like Nanoparticles Synthesized by Co-Precipitation Method

M. Rilwanu, I. Abdulkadir, S. O. Idris

Abstract


Potassium and barium doped perovskite nanoparticles (Bi0.6K0.2Ba0.2FeO3) have been synthesized using the co-precipitation process. The synthesized powders were calcined at 400 0C and then different portions were separately tempered at annealing temperatures of 400, 600, 700 and 800 0C for 4 hours each. The resultant nanopowders were then characterized using scanning electron microscopy (SEM) and were observed to be nanorods at high annealing temperature. Powder X-ray diffraction (XRD) showed that the powders crystallized in rhombohedral R3c lattice. Diffuse reflectance spectroscopy (DRS) showed that the materials are all visible light active with materials annealed at higher temperatures displaying higher absorption. Fourier transform infrared spectrometer (ATR-FTIR) was used to analyse the surface structure of the powder particles. The photodegradation efficiency of the dye was found to increase with an increase in irradiation time and annealing temperature having percentage removal of 29.9, 45.4, 59.1 and 65.7% for the powders annealed at 400, 600, 700 and 800 0C respectively after 120 minutes of visible light irradiation, which makes them suitable for photodegradation applications. Addition of 1M peroxide (H2O2) was found to improve the performance of the powders very significantly with the powder annealed at 800 0C having the best activity.


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