A Comprehensive Comparison of the Structural, Ferroelectric, Energy Storage, and Photocatalytic Properties of Chemical Composition-Tailored Perovskite Ceramics

This article reports on the structural, ferroelectric, energy density, and photocatalytic properties of (Pb 0.50 Ba 0.35 Ca 0.15 )(Fe 0.25 Nb 0.25 Ti 0.50 )O 3 [PBCTO] and (Pb 0.50 Ba 0.50 )(Fe 0.25 Nb 0.25 Zr 0.1 Ti 0.40 )O 3 [PBZTO] ceramics synthesized by the solid synthesis route. X-ray diffraction and Raman spectra confirmed peaks corresponding to perovskite crystalline structure with tetragonal phase for both PBCTO and PBZTO ceramics. Slim ferroelectric hysteresis was observed in polarization-electric field measurements. Remnant polarization (Pr), and coercive field (Ec) values are ∼3.63 μC cm −2 , ∼25.4 kV cm −1 , and ∼1.39 μC cm −2 and 17.9 kV cm −1 for PBCTO and PBZTO, respectively. Energy densities were obtained from ferroelectric hysteresis loops. For PBCTO ceramics, the largest unreleased energy density is 0.72 J cm −3 @ 200 kV cm −1 ; for PBZTO ceramics, the largest unreleased energy density is 0.60 J cm −3 @200 kV cm −1 . Photocatalytic performance was studied on methylene blue (MB) and methyl orange (MO) dyes under visible irradiation. The degradation percentage of MB dye in the presence of PBCTO and PBZTO was found to be 56% and 98% in 80 min with irradiation. The degradation percentage of MO dye in the presence of PBCTO and PBZTO at their respective wavelength was 48% and 97% in 120 min with irradiation. These bulk ceramics under study have shown interesting multifunctional properties useful for various potential applications.