Skip to content
DraconiticResearch
Search Sources API
181,716 studies31 sourcesUpdated 40 min ago
Peer-reviewedCC BY 4.0ACS Omega

Quantification of Partial Oxidation of Magnetite to Maghemite in Aqueous Solution Using XRD

  • Morgane Desmau1
  • Thaïs Couasnon2
  • Roberts Blukis2,3
  • Jeffrey Paulo H. Perez2
  • Liane G. Benning2,4
4 affiliations
  1. 1Deutsches Elektronen-Synchrotron DESY , Notkestr. 85 , ,
  2. 2GFZ Helmholtz Center for Geosciences , Telegrafenberg , ,
  3. 3Leibniz-Institut für Kristallzüchtung , Max-Born Str. 2 , ,
  4. 4Freie Universität Berlin , , ,
Read full textPDFDOICite

Abstract

In aqueous solutions, magnetite (Fe3O4) nanoparticles (NPs) easily oxidize into a material with crystalline characteristics in between magnetite and maghemite (γ-Fe2O3), inevitably modifying their properties. The routine quantification and characterization of this transformation were previously hampered by the structural similarity of magnetite and maghemite. Here, we compared X-ray Absorption Fine Structure (XAFS) characterization to laboratory-based X-ray Diffraction (XRD) pattern analysis, such as Rietveld refinement and peak position shifts of the (311), (400), (511), and (440) reflections, to determine if XRD can be used to determine magnetite oxidation by itself. We analyzed the transformation extent of nanoparticles (10 nm) reacting under different concentrations of oxidizing agents such as O2 and H2O2. We showed that XRD methods─Rietveld refinements and single peak, such as (511)-based─can within error reproduce XAFS results. Our results document a more accessible characterization method for the quantification of magnetite NPs partial oxidation in solution.

Related

  1. Thermo-photo catalytic partial oxidation of methane on hematite nanosheets functionalized with silver nanoparticles
    Jake Heinlein, Aislinn Whalen, Gaukhar Alzhanova +7
    ChemRxivPreprintCC BYFull textCatalysisChemRxiv
  2. Enhanced methane partial oxidation via plasma–catalyst coupling using ion-exchanged copper geopolymers deposited on the inner electrode
    Zeina Al Zayed, Elodie Fourré, Vincent Robin +2
    FuelPeer-reviewedCC BYCatalysisHAL
  3. Benchmarking Faradaic Efficiency and O2 Quantification during Water Oxidation under Mild Conditions Using a 3D-Printed Cell and Clark Electrode
    Nycolas S. Galdino, Nishta Nagpal, Isabelle C. S. Chaves +3
    ACS OmegaPeer-reviewedCC BY 4.0Full textElectrochemistry & energyCrossrefEurope PMC
  4. Tuning Lanthanum Promotion in Ni/CeO2 Catalysts for Hydrogen-Rich Syngas Production via Partial Oxidation of Methane
    Wedad A. Al-onazi, Abdulaziz A. M. Abahussain, Tahani Saad Algarni +7
    CatalystsPeer-reviewedCC BY 4.0CatalysisCrossref
  5. FTIR-Based Quantification of a Corrosion Inhibitor in Solution: Experimental Investigation and Quantum-Chemical Modeling
    Henrique Leal Zimmer, Nadezhda A. Andreeva, Vitaly V. Chaban +2
    ACS OmegaPeer-reviewedCC BY 4.0Full textGeneral chemistryCrossref

Cite

BibTeXRIS
BibTeX
@article{desmau2026quantification,
  title = {{Quantification of Partial Oxidation of Magnetite to Maghemite in Aqueous Solution Using XRD}},
  author = {Morgane Desmau and Thaïs Couasnon and Roberts Blukis and Jeffrey Paulo H. Perez and Liane G. Benning},
  journal = {ACS Omega},
  year = {2026},
  month = oct,
  doi = {10.1021/acsomega.6c01180},
  url = {https://pubs.acs.org/acsodf/article/11/42/64404/5451936/Quantification-of-Partial-Oxidation-of-Magnetite},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - Quantification of Partial Oxidation of Magnetite to Maghemite in Aqueous Solution Using XRD
AU  - Morgane Desmau
AU  - Thaïs Couasnon
AU  - Roberts Blukis
AU  - Jeffrey Paulo H. Perez
AU  - Liane G. Benning
PY  - 2026
DA  - 2026/10/15
JO  - ACS Omega
DO  - 10.1021/acsomega.6c01180
UR  - https://pubs.acs.org/acsodf/article/11/42/64404/5451936/Quantification-of-Partial-Oxidation-of-Magnetite
AB  - In aqueous solutions, magnetite (Fe3O4) nanoparticles (NPs) easily oxidize into a material with crystalline characteristics in between magnetite and maghemite (γ-Fe2O3), inevitably modifying their properties. The routine quantification and characterization of this transformation were previously hampered by the structural similarity of magnetite and maghemite. Here, we compared X-ray Absorption Fine Structure (XAFS) characterization to laboratory-based X-ray Diffraction (XRD) pattern analysis, such as Rietveld refinement and peak position shifts of the (311), (400), (511), and (440) reflections, to determine if XRD can be used to determine magnetite oxidation by itself. We analyzed the transformation extent of nanoparticles (10 nm) reacting under different concentrations of oxidizing agents such as O2 and H2O2. We showed that XRD methods─Rietveld refinements and single peak, such as (511)-based─can within error reproduce XAFS results. Our results document a more accessible characterization method for the quantification of magnetite NPs partial oxidation in solution.
SN  - 2470-1343
ER  -