Enhanced photocatalytic activity, transport properties and electronic structure of Mn doped GdFeO₃ synthesized using the sol–gel process

Abstract

Mn doping reduced the band gap to 1.72 eV from 2.18 eV which is confirmed from electronic structure calculations. GdFe0.7Mn0.3O3 exhibits 99% Rh-B degradation at 25 minutes. The multiple oxidation states of Fe and Mn enhances the conductivity and Mn doping reduces the barrier width which facilitates the charge transfer process.

Effect of Bismuth on the Structure, Magnetic and Photocatalytic Characteristics of GdFeO3

“…In addition, the reduction in band gap for all the doped sample may be related to the distortion in the Fe-O-Fe octahedral rearrangement of molecular orbitals and decreased particles size [28]. The decrease of the band gap was also observed in Sm-doped BiFeO3 and Mn-doped GdFeO3 [5,29]. The hybridization between the Fe-3d and O-2p states depends on Fe-O-Fe exchange angles, which directly modify the band gap [14].…”

“…Some studies have been conducted to investigate the photocatalytic behaviors of GdFeO 3 , and effective strategies have also been proposed to boost the photocatalytic performance. For instance, the substitution of Mn at the Fe site of GdFeO 3 introduces an extra electronic state between the conduction band and the valence band, which reduces the optical band gap and enhances the rhodamine-B (Rh-B) degradation efficiency [5]. The degradation rate of Rh-B is greatly improved by a factor of 2.5 for GdFe 0.7 Mn 0.3 O 3 as compared to pure GdFeO 3 .…”

A Review on Synthesis, Properties, and Environmental Application of Fe-Based Perovskite

“…GdFeO 3 and GdFeO 3 doped with Mn were both produced by the sol-gel method by Maity et al e orthorhombic phase of GdFeO 3 with the Pbnm space group is seen. O type orthorhombic phase, which exhibits decreased unit volume and increased photocatalytic activity, is retained when Fe is replaced with 30 percent Mn [42]. Chandra Sekhar created MnFeO 3 using the combustion process.…”

Gd doped LaFeCuO3 perovskites for enhanced olefin selectivity in CO2 hydrogenation

“…CO 2 activation leads to the cleavage of C-O bonds, followed by the diffusion of oxygen atoms into the perovskite matrix. 8,[21][22][23] For the spent LaFeCuO 3 sample (Fig. 2b…”