Preparation of ?-Fe2O3-Fe2O3 ultrafine powders by laser vapour-phase reaction

Li, Xinyong; Lin, Enhui; Zhang, Changyan; Li, Shuben

doi:10.1007/bf00270719

Cited by 4 publications

(3 citation statements)

References 5 publications

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Section: Results and Discussionsupporting

confidence: 86%

“…The binding energies of Fe 2p 3/2 (710.6 eV) and Fe 2p 1/2 (724.0 eV) signals in the samples for 5 and 45 min depositions were consistent with values reported for hematite (Fe 2p 3/2 ∼710.6−711.6 eV). 43 Moreover, the Fe 2p 3/2 peak of hematite exhibits a satellite signal at ∼717 eV, which was also detected in the 5 min sample (Supporting Information, Figure S3a). In the 45 min layer, this satellite signal was less pronounced (around 717 eV) due to Fe 2+ satellites, which are characteristic for magnetite (Supporting Information, Figure S3b).…”

Section: Resultsmentioning

confidence: 70%

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Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation

Leduc

Goenuellue

Ghamgosar

et al. 2019

ACS Appl. Nano Mater.

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Photoelectrochemical (PEC) water splitting reactions are promising for sustainable hydrogen production from renewable sources. We report here, the preparation of α-Fe 2 O 3 /Fe 3 O 4 composite films via a single-step chemical vapor deposition of [Fe(O t Bu) 3 ] 2 and their use as efficient photoanode materials in PEC setups. Film thickness and phase segregation was controlled by varying the deposition time and corroborated through cross-section Raman spectroscopy and scanning electron microscopy. The highest water oxidation activity (0.48 mA/cm 2 at 1.23 V vs RHE) using intermittent AM 1.5 G (100 mW/cm 2 ) standard illumination was found for hybrid films with a thickness of 11 μm. This phenomenon is attributed to an improved electron transport resulting from a higher magnetite content toward the substrate interface and an increased light absorption due to the hematite layer mainly located at the top surface of the film. The observed high efficiency of α-Fe 2 O 3 /Fe 3 O 4 nanocomposite photoanodes is attributed to the close proximity and establishment of 3D interfaces between the weakly ferro-(Fe 2 O 3 ) and ferrimagnetic (Fe 3 O 4 ) oxides, which in view of their differential chemical constitution and valence states of Fe ions (Fe 2+ /Fe 3+ ) can enhance the charge separation and thus the overall electrical conductivity of the layer.

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Section: Results and Discussionsupporting

confidence: 86%

Section: Resultsmentioning

confidence: 70%

Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation

Leduc

Goenuellue

Ghamgosar

et al. 2019

ACS Appl. Nano Mater.

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“…Some methods have been developed to synthesize iron oxide powders with specific particle sizes [45][46][47][48], comparing with mention methods, directly reduction synthesis has considerable advantages of a single step process at low temperature, composition and morphological control. The nanoparticles of Į-Fe 2 O 3 were obtained in alkali medium with dripping ascorbic acid into solution.…”

Section: Resultsmentioning

confidence: 99%

A new reduction route for the synthesis of nanoscale metals and metal oxides with ascorbic acid at low temperature

Khorasani-Motlagh

Noroozifar

Shahroosvand

2010

JICS

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Reduction of the transition metal complexes in aqueous solution has been investigated systematically by ascorbic acid as the reducing agent without the assistance of any surfactant. Nanoparticles of Į-Mn 2 O 3 , Ag and Cu were synthesized directly through aqueous phase reduction at room temperature. Nanoscale metal oxides such as Co 3 O 4 , Į-Fe 2 O 3 and MoO 2 were obtained through ascorbic acid reduction in alkali medium at 40ÛC. All the products were characterized on their structure and micro-morphology by the X-ray diffraction (XRD) and atomic force microscopy (AFM). The particle size of metal and metal oxides was about 10-50 nm. The reaction details and features were described and discussed.

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Solvothermal synthesis of α-Fe2O3 particles with different morphologies

Chen

Jiao

Chen

2001

Materials Research Bulletin

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Preparation of ?-Fe2O3-Fe2O3 ultrafine powders by laser vapour-phase reaction

Cited by 4 publications

References 5 publications

Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation

Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation

A new reduction route for the synthesis of nanoscale metals and metal oxides with ascorbic acid at low temperature

Solvothermal synthesis of α-Fe2O3 particles with different morphologies

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Preparation of ?-Fe2O3-Fe2O3 ultrafine powders by laser vapour-phase reaction

Cited by 4 publications

References 5 publications

Electronically-Coupled Phase Boundaries in α-Fe2O3/Fe3O4 Nanocomposite Photoanodes for Enhanced Water Oxidation

Electronically-Coupled Phase Boundaries in α-Fe2O3/Fe3O4 Nanocomposite Photoanodes for Enhanced Water Oxidation

A new reduction route for the synthesis of nanoscale metals and metal oxides with ascorbic acid at low temperature

Solvothermal synthesis of α-Fe2O3 particles with different morphologies

Contact Info

Product

Resources

About

Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation

Electronically-Coupled Phase Boundaries in α-Fe₂O₃/Fe₃O₄ Nanocomposite Photoanodes for Enhanced Water Oxidation