EDTA-modified sol-gel synthesis of monoclinic Li2MnO3 nanoparticles as an effective photocatalyst for degradation of organic dyes

Reaction Mechanism of Li2MnO3 Electrodes in an All-Solid-State Thin-Film Battery Analyzed by Operando Hard X-ray Photoelectron Spectroscopy

“…A previous study used the addition of U on O 44 to obtain a computational bandgap of O3−Li 2 MnO 3 that was close to the experimental one. The calculated minimum and direct bandgaps of Li 2 MnO 3 in our implementation are 2.02 and 2.03 eV, which is consistent with experimentally obtained bandgaps of 2.1, 46 2.17, 47 1.76 (nanoparticle), 48 and 2.47 eV (alternative stacking). 49 The plane-wave cutoff was 550 eV, a 3 × 5 × 4 k-mesh was used, and the convergence criteria for the structural relaxations were total energy change less than 10 −6 eV and norms of all the forces less than 0.01 eV/Å.…”

Ru doping effect on the structural, electronic, transport, optical and dye degradation properties of layered Li2MnO3

“…Features observed in optical conductivity close to 1 eV, 3 eV have been ascribed due to the d-d charge transfer between Mn ions on different sites, e g −e g transitions in perovskite manganite systems [37][38][39] It has been shown that cationic additive enhances the degradation capability of Li 2 MnO 3 . These cations make positive surface of Li 2 MnO 3 and prevent electron-hole recombination which help generation of.OH on the Li 2 MnO 3 surface [40]. We have selected two different type of dyes, (i) A cationic dye, Methylene Blue (MB) and (ii) an azo dye methyl orange (MO) for degradation capabilities of Li 2 MnO 3 and its Ru doped compositions.…”

Nanostructured europium-doped layered lithium manganese oxide as a prospective cathode material for aqueous lithium-ion battery

“…The narrow peaks situated at ~870 cm − 1 are assigned to the coordination of the Li, Mn, and Eu cations to the nitrogen functionality due to EDTA present in the material [48]. Furthermore, two broad peaks situated at the frequency range ~1427-1505 cm − 1 are assigned to the coordination of the carboxylic functionalities of EDTA to Li, Mn, and Eu cations [50]. The larger broad peak situated at ~3500 cm − 1 is assigned to surface absorbed moisture.…”

“…6(a) and (c) respectively. It is well established that the morphology of fine powders is influenced by the choice of reagents, the method of preparation, synthesis, and calcining temperature [30,50]. Both images of Li 2 MnO 3 and Li 2 Mn 0.95 Eu 0.05 O 3 exhibit some agglomeration of smaller primary particle to form larger secondary particles.…”