Semi-continuous production of iron oxide nanoparticles via membrane emulsification

Maria Medina-Llamas, Davide Mattia

Research output: Contribution to journalArticlepeer-review

7 Citations (SciVal)
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The large-scale production of nanomaterials with fine control over their shape, size and properties remains a major obstacle towards their further use. Here, the semi-continuous production of metal oxide nanoparticles (NPs) via membrane emulsification (ME) is reported for the first time, using an oil-in-water emulsion and a commercial stirred ME setup fitted with a novel ring-shaped anodic alumina membrane (AAM). A systematic investigation of process parameters showed that the narrow pore size distribution of AAMs resulted in a narrow size distribution of both droplets and particles, with Ddroplet/Dpore as small as 2.8, compared to typical literature values of 10 or more. The average particle size was 4.2 ± 0.5 nm and 18 ± 4 nm for the as-synthetized and calcined NPs, respectively. Calculations of the emulsion production rate demonstrate the potential of the ME setup to produce up to 1 kg of NP per hour per metre squared of membrane.

Original languageEnglish
Pages (from-to)504-512
Number of pages9
JournalApplied Surface Science
Early online date30 Aug 2018
Publication statusPublished - 1 Jan 2019


  • Anodic alumina membrane
  • Hematite
  • Membrane emulsification
  • Nanoemulsions
  • Nanoparticles

ASJC Scopus subject areas

  • Surfaces, Coatings and Films


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