Abstract
Bismuth ferrites have attracted much attention in recent years because of the possibility of their promising practical applications in sensing systems as well as digital memory.In this study, nanocrystalline material based on bismuth ferrite with mullite-like structure was synthesized by solution combustion technique. The results of XRD confirmed the formation of a Bi2Fe4O9 orthorhombic phase with an average crystallite size 60 ± 3 nm. The composition, morphology and porosity were characterized by SEM/EDX and helium pycnometry. The peculiarities of the material formation from the initial mixture with a glycine deficiency by subsequent calcination of the combustion product in air, were characterized by XRD, EDX and simultaneous thermal analysis.Magnetic properties of the substance were studied by Mössbauer spectroscopy and magnetometry which showed that its magnetization is enhanced in comparing to similar materials by several times. Specific features in the Bi2Fe4O9 magnetization with changing temperature were analyzed for the first time.The photocatalytic activity of Bi2Fe4O9 during the decay of rhodamine B has been studied. It is demonstrated that the degradation of rhodamine B increased by about 70% when irradiated with visible light.
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