Structural, optical, dielectric, and magnetic properties of iron-sillenite Bi25FeO40

The iron-sillenite Bi25FeO40 has been synthesized using the solid-state reaction route. The elaborated material crystallizes in a cubic structure. The studied material exhibits an anomaly, noticed via the DSC analysis and dielectric measurements at 671 K. This anomaly can be attributed to the occurrence of a thermally activated relaxation in the Bi25FeO40 sample. Besides, the magnetic study revealed the antiferromagnetic behaviour of gamma-Bi25FeO40 sillenite, with a 240 K of Neel temperature T-N, Curie constant of 9.18 10(-8) m(3).K/mol, resulting in a magnetic moment of 6.37 mu(B). Furthermore, the band gap of Bi25FeO40 is about 2.02 eV and the magnetic behavior makes it an appropriate candidate as a photocatalyst for water and/or wastewater treatment, and degradation of pollutants, that can be simply recycled by magnetic separation.

Automated summary

The iron-sillenite Bi25FeO40 was synthesized via the solid-state reaction route and exhibited a cubic structure. An anomaly was observed at 671 K, attributed to a thermally activated relaxation. The material also showed antiferromagnetic behavior and a band gap of 2.02 eV, making it a potential photocatalyst for water and/or wastewater treatment and pollutant degradation that can be easily recycled through magnetic separation.