Synthesis of Ruddlesden-Popper LaSrFe1-Cr O4 phases (x = 0.0, 0.2, 0.4, 0.6) by glycine-nitrate combustion process: Effect of Cr doping on magnetic, optical and photocatalytic properties

New Rare Earth-Doped Bilayered Perovskite Oxide Photocatalysts Sr2La0.5R0.5FeMnO7 (R = La, Nd, Sm, Gd, Dy) for the Degradation of Highly Toxic Methylene Blue Dye in Wastewater under Visible Light: Structural, Optical, and Magnetic Properties

“…As a consequence, (Mn/Fe)–O–(Mn/Fe) overlap changes that ultimately leads to a decrease in the magnitude of superexchange interactions. , The irreversibility observed between the ZFC and FC curve could have resulted from the coexistence of competing antiferromagnetic and weak ferromagnetic interactions because of the randomly substituted Mn 4+ , Mn 3+ , and Fe 3+ ions at the B-site. Usually, this kind of competing magnetic interaction leads to magnetic frustrations resulting in spin glass behavior. , However, no such behavior could be observed in our phases, implying that the magnetic frustration in the present compound is not strong enough to cause a spin glass transition, but it only perturbs the spin arrangement in the samples …”

“…52 , 55 However, no such behavior could be observed in our phases, implying that the magnetic frustration in the present compound is not strong enough to cause a spin glass transition, but it only perturbs the spin arrangement in the samples. 56 …”

“…52,55 However, no such behavior could be observed in our phases, implying that the magnetic frustration in the present compound is not strong enough to cause a spin glass transition, but it only perturbs the spin arrangement in the samples. 56 Figure 12 shows the plot of inverse molar magnetic susceptibility versus temperature. It can be seen that no linear region is observed within the studied temperature range, and therefore, the Curie−Weiss law will not be applicable to all our synthesized phases.…”

Effect of rare earth doping on the structural, magnetic and photocatalytic properties of newly synthesized nanocrystalline rare earth doped Ruddlesden–Popper oxides LnSrFe0.5Co0.5O4 (Ln = La, Nd, Sm, Gd)

“…The values of band gap energy ( E g ) of the synthesised nanophases were estimated using the DRS data by utilizing the Kubelka–Munk equation. 28,29,32 …”

“…21 An increase in substitution of Cr in LaSrFe 1− x Cr x O 4 ( x = 0.0, 0.2, 0.4, 0.6) phases results in the improvement of the photo-degradation of Rhodamine B (RhB), and the x = 0.6 phase shows 99% degradation in 40 min under visible light irradiation. 29 Mousavi et al found that as the amount of oxidant H 2 O 2 increased, the degradation efficiency of the methyl orange (MO) pollutant by La 0.7 Sr 1.3 CoO 4 nano powder also increased, and 94% degradation was achieved in 75 min under exposure to UV light irradiation. 30 For Sr 3.2− x Ca x La 0.8 Fe 1.5 Co 1.5 O 10− δ ( x = 0, 0.2, 0.4, and 0.8) RP oxide, the photocatalytic deterioration of methylene blue (MB) dye is enhanced by the increase in the value of x .…”