Study on co-precursor driven solid state thermal conversion of iron(III)citrate to iron oxide nanomaterials

Reaction Atmosphere-Controlled Thermal Conversion of Ferrocene to Hematite and Cementite Nanomaterials─Structural and Spectroscopic Investigations

“…No additional iron oxide, such as magnetite or maghemite, was found, proving the high degree of purity of the products. There have been reports of similar outcomes for hematite nanoparticles. ,, …”

“…Raman spectra of iron oxides having several phases show distinctive phonon modes, verifying the purity and type of the phases . Based on hematite’s crystallographic properties, Raman active vibrational modes are represented by Γ hematite = 2 A 1g + 5 E g , where seven Raman modes can be experimentally observed . The rhombohedral structure of hematite can be demonstrated analyzing the Raman spectrum.…”

“…There have been reports of similar outcomes for hematite nanoparticles. 12,72,73 Less information is available in the literature on the Raman study of pure iron carbide. The Raman spectrum of FO-N2 (Figure 8) displays five prominent peaks at 213, 276, 1328, 1588, and 2685 cm −1 along with two weak peaks at 384 and 590 cm −1 .…”

“…Additionally, it can serve as the starting material for the production of magnetite (Fe 3 O 4 ) and maghemite (γ-Fe 2 O 3 ) . Hematite with bandgap of around 2.2 eV, acts as an n-type semiconductor and possesses a magnetic spin-flop transition at ∼260 K . Conversely, iron carbides have found useful applications in different fields, particularly because of their magnetic, catalytic, and mechanical properties. ,,, Structurally, they are intermetallic compounds consisting of iron and carbon that range in composition from FeC to Fe 7 C. Among these different forms of iron carbides, cementite (Fe 3 C) is the most popular, and it possesses an orthorhombic crystal structure and huge application potential. ,− Study of iron carbide materials in the nanometric range is a complex as well as challenging part of research because of the delicate balance among the various phases of the dominant components.…”

Solid-State Reaction of Ferrocene Controlled by Co-Precursor and Reaction Atmosphere Leading to Hematite and Cohenite Nanomaterials: A Reaction Kinetic Study

“…Synthesis and characterization of iron oxide nanoparticles have become an exciting area of research as these materials possess many outstanding characteristics like low-energy band gap, high sensitivity, tunable optical and magnetic properties, superparamagnetism, biodegradability, biocompatibility, and high stability. − Among the different iron oxides known so far, magnetite (Fe 3 O 4 ), maghemite (γ-Fe 2 O 3 ), and hematite (α-Fe 2 O 3 ) are the most commonly found in nature, whereas hematite is the most stable iron oxide at ambient atmosphere, and thus, hematite nanoparticles are paving newer avenues of applications. − Though hematite nanoparticles are available in different morphologies and synthesized using different physical and chemical methods, thermal synthesis of hematite nanoparticles from iron-organic solid precursors at comparatively low temperatures has become a significantly convenient synthetic method . This technique has a number of benefits, apart from the synthesis at comparatively low temperatures, such as quick reaction time, control by reaction environment, and use of a variety of iron-organic compounds as precursors …”