Aurivillius family of layered perovskites, BiREWO6 (RE = La, Pr, Gd, and Dy): Synthesis, characterization, and photocatalytic studies

Abstract

The present work deals with the synthesis, characterization, and photocatalytic studies of layered perovskites belonging to Aurivillius family. Layered perovskites of various chemical compositions, BiREWO 6 (RE ¼ La, Pr, Gd, and Dy), were synthesized by an ethylene glycol eassisted solegel method. These materials were characterized by X-ray diffraction, scanning electron microscopyeenergy dispersive spectroscopy (EDS), Fourier transform infrared, Raman, and ultravioletevisible diffuse reflectance techniques. The composition of all these materials was obtained from EDS. The unit cell lattice parameters were attained from Rietveld refinement program, Fullprof.2k, by refining the d-lines of BiREWO 6 . The band gap energy of these samples was obtained from the KubelkaeMunk plot. The photocatalytic activity of all the samples was evaluated by photodegradation of methylene blue. The mechanistic degradation pathway of methylene blue was studied using radical quenchers.

Carbon nanospheres supported visible-light-driven ZnSb2O6: synthesis, characterization and photocatalytic degradation studies

“…To ascertain the efficiency of charge carrier migration, trapping, and transfer of electron-hole pairs in the present systems, the photoluminescence (PL) spectra of ZSO and CNSZSO are recorded (Fig. 11) [26]. The photoluminescence experiment gives an idea about the lifetime of the electron-hole pair.…”

Preparation of Bi3Fe0.5Nb1.5O9/g-C3N4 heterojunction photocatalysts and applications in the photocatalytic degradation of 2,4-dichlorophenol in environment

“…26 Mamidi et al synthesized the layered Aurivillius family BiREWO 6 (RE = La, Pr, Gd, and Dy) samples, the activity of which was evaluated from the degradation of methylene blue (MB). 27 BFNO also belongs to the Aurivillius phase semiconductor photocatalyst, which is composed of an alternating fluorite structure bismuth oxide layer (Bi 2 O 2 ) 2+ and a perovskite layer (BiFe 0.5 Nb 1.5 O 7 ) 2− . It has a typical layered structure and can provide large specific surface areas and surface-active sites.…”

Eco-Friendly Synthesis and Characterization of Plate-Like Fe doped SrBi4Ti4O15 by Molten Salt Method

“…Aurivillius compound synthesis methods that have been used include solid-state reaction, hydrothermal, sol-gel and molten salt synthesis [18][19][20][21]. The molten salt method is a simple, environmentally friendly method, inexpensive, effectively controls particle size and morphology, and requires a lower temperature than the solid-state reaction method [22,23].…”