Characterization and Applications of Calcium Ferrites Based Materials Containing Active Oxygen Species

Abstract

Characterization and application of calcium ferrites based solid solutions containing active oxygen species for catalysts in propylene total and methane partial oxidation has been studied. The calcium ferrite based solutions containing brownmillerite phases showed a structural transition based on the migration of oxide ions at high temperature. The calcium ferrite solution provided two types of active oxygen species due to the existence of the brownmillerite phase. These oxygen species individually played important roles in the propylene and methane oxidation mechanisms.

Synthesis of Co-Zr doped nanocrystalline strontium hexaferrites by sol-gel auto-combustion route using sucrose as fuel and study of their structural, magnetic and electrical properties

“…Development of high quality low cost and low loss materials with suitable structural, magnetic and electrical properties is an ever challenging aspect of investigation. Nanosized ferrites offer new opportunities for enhancing the performance of solid catalysts [12][13]. Besides, ferrite composites with an appropriate ferroelectric material could be useful for room temperature magnetoelectric applications [14].…”

Ultrathin, Porous CoPS Nanosheets: GO Self-Sacrificing Template Synthesis as Bifunctional Catalysts for Overall Water Splitting

“…The appearance of these peaks confirms the adsorption of Co­(III). − In particular, the band at 373.5 cm –1 is attributed to the stretching vibration of the P–S bond . The characteristic peak at 1556 cm –1 can be assigned to the presence of an O 2 molecule . The 1354.7 and 1595.6 cm –1 peaks are the D band and the G band in the Co­(OH) 2 -GO sample, respectively.…”

“…26 The characteristic peak at 1556 cm −1 can be assigned to the presence of an O 2 molecule. 27 The 1354. 2d) demonstrate that the average thickness of the small-sized nanosheets is ∼7.8 nm, well-matching with the SEM (Figure 2a) and TEM (Figure 2g) images.…”

Sustainable One-Step Conversion of Soluble NaVO3 into CaV2O4 through Molten Salt Electrolysis

“…The peaks at 843 and 341 cm the symmetric and antisymmetric vibrations of the V-O-V band. [23][24][25] Furthermore, the peak at 234 cm -1 might be attributed to CaV 2 O 4 defects. The same result was also obtained in a previous report.…”