Study of bamboo-type carbon nanotubes with magnetic iron carbide nanoparticles fabricated by a modified CVD method

Guerrero, A. Lobo; Rebollo-Plata, B.; J, Gallegos; Bahena, Daniel; Altamirano, M. A. Guzmán; Cabal-Velarde, J. G.

doi:10.1007/s11051-021-05207-3

Cited by 4 publications

(2 citation statements)

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“…Organoiron compound ferrocene, (C 5 H 5 ) 2 Fe, has been used profusely either as a precursor or catalyst for synthesis of various iron-based nanostructures. −, ,− Ferrocene, solid at room temperature with mp at ∼450 K and bp at ∼522 K, undergoes complete sublimation . Above ∼773 K, ferrocene vapor decomposes to metallic iron along with several gaseous products (e.g., CH 4 , H 2 ) .…”

Section: Introductionmentioning

confidence: 99%

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

Kundu,

Sarkar,

Ghorai

et al. 2024

ACS Omega

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Recently, we have reported the influence of various reaction atmospheres on the solid-state reaction kinetics of ferrocene, where oxalic acid dihydrate was used as a coprecursor. In this light, present study discusses on the nature of decomposed materials of the solid-state reactions of ferrocene in O 2 , air, and N 2 atmospheres. The ambient and oxidative atmospheres caused the decomposition to yield pure hematite nanomaterials, whereas cementite nanomaterials along with α-Fe were obtained in N 2 atmosphere. The obtained materials were mostly agglomerated. Elemental composition of each material was estimated. Using the absorbance data, the energy band gap values were estimated and the related electronic transitions from the observed absorption spectra were explored. Urbach energy was calculated for hematite, which described the role of defects in the decomposed materials. The nanostructures exhibited photoluminescence due to selftrapped states linked to their optical characteristics. Raman spectroscopy of hematite detected seven Raman modes, confirming the rhombohedral structure, whereas the D and G bands were visible in the Raman spectra for cementite. Thus, the reaction atmosphere significantly influenced the thermal decomposition of ferrocene and controls the type of nanomaterials obtained. Plausible reactions of the undergoing solid-state decomposition have been proposed.

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Section: Introductionmentioning

confidence: 99%

“…Notably, bare oxalic acid dihydrate decomposes completely when heated over 373 K . Conversely, ferrocene also plays a vital role in preparing Fe 3 C nanostructures. − …”

Section: Introductionmentioning

confidence: 99%