Electronic, magnetic, optical and solar energy absorption properties of the Fe2V4O13 vanadate

Abstract

The iron vanadium oxide semiconductor Fe 2 V 4 0i 3 has interesting properties as an absorbent material for the conversion of solar energy. In this work the electronic, magnetic and optical properties of Fe 2 V 4 0 13 have been obtained and analyzed from theoretical calculations and compared with experimental results. From the results, the main contributions to the optical properties come from the transitions between O-V states. The optical properties have been used to evaluate this compound as a solar energy converter using mono-and multi-junction configurations.

Fabrication of a Novel Co/CoO@Fe2V4O13 Composite Catalyst as a Photoanode for Enhanced Photoelectrochemical Water Oxidation

“…The Fe 2p 1/2 core‐level spin‐orbit is observed at 709.2 eV, whereas the satellite peak at 718.1 eV represents the oxidation state of iron (Fe 3+ ) in Fe 2 V 4 O 13. [31,32] The V2p XPS spectrum (Figure 1d) exhibits two peaks at 515.77 and 523.14 eV, which correspond to the V2p 3/2 and V2p 1/2 core‐levels of Vanadium (+5) state, respectively [34] . The O1s spectra (shown in Figure 1e), shows a pair of deconvoluted binding energy peaks located at 530.3 and 531.5 eV.…”

“…[ 31,32] The V2p XPS spectrum (Figure 1d) exhibits two peaks at 515.77 and 523.14 eV, which correspond to the V2p 3/2 and V2p 1/2 core-levels of Vanadium (+ 5) state, respectively. [34] The O1s spectra (shown in Figure 1e), shows a pair of deconvoluted binding energy peaks located at 530.3 and 531.5 eV. These peaks have been attributed to the lattice and the adsorbed oxygen of Fe 2 V 4 O 13 .…”

Intramolecular orbital engineered hetero bimetallic Ce‐Fe MOF with reduced transition energy and enhanced visible light property

“…Being a transition metal, a vacant array of d orbital with d xy , d yz , d zx , d x2−y2 and d z 2 subsets are available for bonding. [ 21 ] It is evident from Figure 3(c) that all the synthesized MOFs exhibited absorption in the visible region, appreciating LMCT transition.…”

“…A plot of (αhν) n and hν signifies the presence of an energy gap between the highest occupied crystal orbital (HOCO) and the lowest unoccupied crystal orbital (LUCO) of the MOFs. The transition energy gap is of the order of 2.53 eV for Ce MOF, 1.45 eV for Fe-MOF and [21] It is evident from Figure 3(c) that all the synthesized MOFs exhibited absorption in the visible region, appreciating LMCT transition. A lone pair of nitrogen of the primary amine of the linker interacts with the π*-orbitals of the benzene ring, shifting the electron density to the anti-bonding orbital.…”

Controlled Nanorod-like Structure of Iron Tetrapolyvanadate for Enhanced Heterogeneous Fenton-like Catalysis

“…Both the FTIR and Raman spectra of the FeV 2 -180-500 sample show a structure comprising Fe 2 O 10 dimeric units and VO 4 tetrahedral units, connected through angles to form a multifunctional U-shaped structure (V 4 O 13 ) 6− [29,30]. In the FeV 2 -180-80 sample, the intensities of these peaks are much less pronounced, indicating the amorphous state.…”