Impact of Gd3+ doping on structural, electronic, magnetic, and photocatalytic properties of MnFe2O4 nanoferrites and application in dye-polluted wastewater remediation

Ultrasonic irradiation-assisted MnFe2O4 nanoparticles catalyzed solvent-free selective oxidation of benzyl alcohol to benzaldehyde at room temperature

“…44,45 While the broad shoulder peaks at around 643.4-643.7 eV correspond to the existence of Mn 4+ in the samples. 45,46 Additionally, a weak peak at around 639.2 eV could be noticed in the tted Mn 2p 3/2 peak in sample MnF-2 which is also attributable to the contribution from Mn 2+ . 44 The high-resolution XPS spectra of the core level Fe 2p region (Fig.…”

“…The Fe 2p 3/2 peaks can be effectively tted into two peaks at 709.5-709.9 eV and 711.1-712.0 eV, which are attributed to the presence of Fe 3+ ions located in the octahedral and tetrahedral sites, respectively as reported earlier. 46,47 Similarly, the Fe 2p 1/2 peaks at 723.6-723.8 eV conrm the presence of Fe 3+ ions in the octahedral sites of the spinel. Additionally, the presence of a satellite peak in the region 717.7-718.0 eV conrms the existence of Fe in the Fe 3+ state in all samples.…”

“…6c) display a peak in the binding energy region 528.7-529.3 eV which is assigned to the lattice oxygen (O 2− ). 46 While the peaks at 530.6-531.0 eV and 532.0-532.1 eV correspond to the hydroxyl oxygen species or oxygen-related vacancy and a surface-adsorbed water molecule. 46,47 The highresolution XPS spectrum of the N 1s region (Fig.…”

“…46 While the peaks at 530.6-531.0 eV and 532.0-532.1 eV correspond to the hydroxyl oxygen species or oxygen-related vacancy and a surface-adsorbed water molecule. 46,47 The highresolution XPS spectrum of the N 1s region (Fig. S2b †) displays a peak at binding energy 398.5 eV in sample MnF-1 which was prepared in the presence of chitosan.…”

Investigation of boron-doped graphene oxide anchored with copper sulphide flowers as visible light active photocatalyst for methylene blue degradation

“…But, every method comes with its merits and demerits. The heterogeneous semiconductor photocatalysis is an environmentally friendly green technique utilizing sunlight as a potential source for the activation of semiconductor materials for pollutants degradation 18 . The pollutants in the water that are the subject of the treatment are mineralized and, in some circumstances, chemically removed as a consequence of the interactions between all of the radicals and the production of further reactive species such as superoxide and H 2 O 2 .…”