Structural transition and enhanced magnetic, optical and photocatalytic properties of novel Ce–Ni co-doped BiFeO3 nanoparticles

Effect of Bismuth on the Structure, Magnetic and Photocatalytic Characteristics of GdFeO3

“…In addition, the standard redox potential E(O 2 /H 2 O 2 ) (0.685 eV vs. NHE) [36] is located between the CB and VB of Gd 1-x Bi x FeO 3 , indicating that electrons could also react with oxygen to form H 2 O 2 , which is subsequently reduced to form hydroxyl radicals (OH • ) (Equations ( 6) and ( 7)) [7]. The holes formed at the VB may directly oxidize the organic pollutant [11]. Finally, the superoxide radicals, hydroxyl radical and holes decompose the MB into CO 2 , H 2 O and by-products, which could be benzenesulfonicacid 2-amino-5-(methyl amino)-hydroxybenzene sulfonic acid and 2-amino-5-(NN-methyl formamide) benzene sulfonic acid [37].…”

“…BiFeO 3 is also regarded as a novel photocatalyst under visible light irradiation, owing to its narrow band gap (2.0 eV-2.2 eV) and excellent chemical stability [9,10]. Meanwhile, the internal electric field from ferroelectric BiFeO 3 possibly enhances surface reactions and photogenerated charge separation efficiency [11]. However, the photocatalytic performance is still restricted by the presence of impurity phases, structural instability, and slow mobility rate [12].…”

“…Dopants are proven to be feasible strategies to modify the magnetic and photocatalytic properties of orthoferrites. Substituents may act as surface traps for holes and electrons, reducing recombination rate and increasing photo-produced charge carrier lifetime, leading to enhanced photocatalysis of materials [11]. The lattice structure, electronic band gap and the dipole-dipole interaction of perovskites can also be effectively regulated by the substitution at the A site or B site, making it possible to effectively modulate the optical, magnetic, electrical and catalytic properties.…”

Recent Advances toward Enhanced Photocatalytic Proprieties of BiFeO3-Based Materials

“…It was reported that the co-substitution of Ce and Ni enormously impacts the photocatalytic efficiency of undoped BFO [ 134 ], which is maximized with the increase of co-doping levels. The best photocatalytic methylene blue and rhodamine B degradation efficiency were estimated at 93.29% and 96.05% after 90 min for Ce- and Ni-co-substitution BFO.…”

“…The bandgap of undoped bismuth ferrite would be effectively reduced from 2.10 eV to 1.85 eV, which provides large photocatalytic efficiency under irradiation using various wavelengths of light. Depending on these experimental findings, the enhanced photocatalytic efficiency of Ce–Ni-co-substitution BFO would be ascribed to the raised optical absorption, the successful separation, and then the migration of photo-produced charge carriers with the reduced recombination feasibility of electron–hole pair findings from the co-substitution influence [ 134 ].…”