Bertuit Enzo, Neveu Sophie, Abou-Hassan Ali
Sorbonne Université, CNRS, Physico-Chimie des Electrolytes et Nanosystèmes InterfaciauX (PHENIX), F-75005 Paris, France.
Nanomaterials (Basel). 2021 Dec 30;12(1):119. doi: 10.3390/nano12010119.
One of the most versatile routes for the elaboration of nanomaterials in materials science, including the synthesis of magnetic iron oxide nanoclusters, is the high-temperature polyol process. However, despite its versatility, this process still lacks reproducibility and scale-up, in addition to the low yield obtained in final materials. In this work, we demonstrate a home-made multiparametric continuous flow millifluidic system that can operate at high temperatures (up to 400 °C). After optimization, we validate its potential for the production of nanomaterials using the polyol route at 220 °C by elaborating ferrite iron oxide nanoclusters called nanoflowers (CoFeO, FeO, MnFeO) with well-controlled nanostructure and composition, which are highly demanded due to their physical properties. Moreover, we demonstrate that by using such a continuous process, the chemical yield and reproducibility of the nanoflower synthesis are strongly improved as well as the possibility to produce these nanomaterials on a large scale with quantities up to 45 g per day.
在材料科学中，用于制备纳米材料（包括磁性氧化铁纳米团簇的合成）的最通用方法之一是高温多元醇法。然而，尽管该方法具有通用性，但除了最终材料的产率较低外，该过程仍然缺乏可重复性和放大性。在这项工作中，我们展示了一种自制的多参数连续流动微流控系统，该系统可以在高温（高达400°C）下运行。经过优化后，我们通过在220°C下使用多元醇路线制备具有良好控制的纳米结构和组成的称为纳米花（CoFeO、FeO、MnFeO）的铁氧体氧化铁纳米团簇，验证了其在生产纳米材料方面的潜力，由于其物理性质，这些纳米花具有很高的需求。此外，我们证明，通过使用这种连续过程，纳米花合成的化学产率和可重复性得到了显著提高，并且有可能大规模生产这些纳米材料，每天产量高达45克。
