Low-temperature synthesis of high-purity BiFeO3 via carbonized metal citrate xerogel (original) (raw)

Journal of Alloys and Compounds, 2020

Abstract

Abstract Bi/Fe-citrate xerogel, prepared by sol-gel processing, was first carbonized and, then, calcined at 300–700 °C for 1 h. The gel and its calcination products were characterized by thermal analyses (TG/DTA), X-ray powder diffractometry (XRD), Fourier-transform infrared spectrophotometry (FTIR), BET-specific surface area measurement (SBET), and Ultraviolet–Visible diffuse reflectance spectrometry (UV–Vis DRS). It was found that the carbonization step helps to subside the effects of a glowing thermal decomposition event, thus suppressing the formation of parasitic phases (such as Fe2O3 and Bi2Fe4O9). Rhombohedral-BiFeO3 yielded at 500 °C was found to assume qualifying properties for photo-assisted applications.

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