Abstract
Abstract The preparation of magnetic iron oxide nanoparticles within microreactors is reported. The proportion of γ-Fe2O3 and Fe3O4 in the sample was determined, an important parameter for reproducibility in applications.
Highlights
A microreactor is used for the the preparation of magnetic iron oxide nanoparticles, containing a mixture of Fe3O4 and γ-Fe2O3, a critical step towards the development of methods suitable for large scale synthesis
Seminal work by Frenz et al [1], Abou-Hassan et al [2], Kumar et al [3], and Chin et al [4] have shown the advantages of using continuous flow technology to prepare iron oxide nanoparticles using either tubular reactors or spinning disc processing, the homemade reactors were subjected to ad hoc modifications meaning that it would be very difficult to implement the technology on an industrial scale
After 40 runs of the microreactor, percentage yields of up to 97 % were obtained, with any loss of product attributed to particle adsorption or the production of non-magnetic biproducts (e.g. γ-FeOOH) which are lost upon particle isolation
Summary
The preparation of magnetic iron oxide nanoparticles within microreactors is reported. The proportion of γ-Fe2O3 and Fe3O4 in the sample was determined, an important parameter for reproducibility in applications
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