Characterization and photocatalytic activity of Y-doped BiFeO3 ceramics prepared by solid-state reaction method

Energy Band Gap Modeling of Doped Bismuth Ferrite Multifunctional Material Using Gravitational Search Algorithm Optimized Support Vector Regression

“…In other words, heavier masses will move slower than lighter masses. The masses are updated using Equations (10) and (11) with the assumption that:…”

“…The structural distortion in the crystal lattice attributed to the introduction of different classes of doping materials into the rhombohedrally distorted perovskite structure of bismuth ferrite is the descriptive input to the developed HGS-SVR model. The distortions are encoded in the lattice parameters of the doped bismuth ferrite compounds extracted from the literature [3,11,[32][33][34][35][36][37][38]. The corresponding experimentally measured energy band gap for all forty-three bismuth ferrite compounds are also drawn from the same source.…”

“…Altering both the A and B sites of this material through doping mechanisms enhances the photocatalytic activity of bismuth ferrite through band gap tuning and consequently distorts its crystal structure. Pure bismuth ferrite is characterized by a distorted rhombohedral perovskite structure with a room temperature space group of R3c [11]. It should be noted that this space group allows spontaneous polarization formation, while the orbital overlap between O and Fe as well as magnetic exchange are controlled by the Fe-O-Fe angle.…”

Effect of Na Doping on the Photocatalytic Hydrogen Production of Ferroelectric K1-xNaxNbO3 Nanofibers

“…Photocatalysis is considered a promising renewable and clean energy technology to solve the energy crisis and environmental issues. − Among the many photocatalytic materials, ferroelectric oxides with ABO 3 perovskite structures can effectively separate the photogenerated carriers because of their spontaneous polarization and have thus attracted extensive research interest. − However, most ferroelectric oxides have a wide band gap and absorb mainly in the ultraviolet (UV) region, which limits their photocatalytic activity. To overcome this problem, the A, B, or O sites of ferroelectric oxides can be doped with metal or nonmetal atoms, forming heterojunctions with some specific semiconductors such as g-C 3 N 4 and MoS 2 to improve their visible light response. − The separation of photogenerated carriers can be accelerated using an applied voltage because of the spontaneous polarization field of ferroelectric oxides. − Furthermore, the crystal structure and morphology of ferroelectric oxides affect the photocatalytic activity. − Nanostructures have large specific surface areas, which provide a high number of active sites in photocatalytic reactions, enhancing their photocatalytic activity. Nanowires with high aspect ratios are more conducive to electron transmission than other nanostructures; this has been verified in previous studies. − …”

Relationship between secondary phase and photocatalytic activity in titanium‐doped bismuth ferrite nanocrystals

“…However, the photocatalytic activity is unsatisfactory due to the rapid recombination of photogenerated electrons and holes in BiFeO 3 nanomaterials [17, 18]. Some strategies, such as doping [19, 20] or forming heterostructure [21–24], have been designed to improve the photocatalytic activity of BiFeO 3 . Among these strategies, doping is a simple and effective method to promote the separation of photo‐generated electrons and holes by introducing an impurity level or tailoring the bandgap [25, 26].…”