Synthesis of iron oxide nanoparticles in microplasma under atmospheric pressure

L. Lin, S. Starostine, V. Hessel, Q. Wang

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)
30 Downloads (Pure)

Abstract

Microplasma is a novel technology for functional nanomaterial synthesis. In this research, iron oxide nanoparticles are successfully synthesized by a home-built microplasma setup. The setup is specially designed with overall safety considerations and broad operation space, including a smart micro reactor system which allows for flexible process control, easy assembling and direct product collection. The atmospheric pressure gas discharge was sustained in Ar flow with addition of ferrocene vapors as a precursor. The influence of the gas temperature and power dissipated in the discharge on the dissociation process is investigated. Optical emission spectroscopy (OES) is applied to study the impact of discharge parameters on plasma characteristics and possible mechanism of the ferrocene dissociation. The obtained products are characterized by scanning electron microscopy (SEM), energy dispersive X-ray spectrometer (EDX), transmission electron microscopy (TEM), high resolution TEM (HRTEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Results show that nanometer-sized and well-dispersed iron oxide nanoparticles with polycrystalline nature can be produced by the atmospheric pressure microplasma setup. The increase of temperature and power helps to enhance the precursor dissociation rate. However, it also contributes to the production of larger sized nanoparticles with higher agglomeration degree. Based on experimental data, simplified modeling as well as relevant information from literature, we proposed possible mechanisms for ferrocene decomposition.
Original languageEnglish
Pages (from-to)360–371
Number of pages12
JournalChemical Engineering Science
Volume168
DOIs
Publication statusPublished - 31 Aug 2017

Keywords

  • Iron oxide nanoparticles
  • Micro reactor
  • Microplasma
  • Nanomaterial synthesis
  • Plasma technology

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