(255a) Microfluidic Synthesis of Titania Microparticles with Tunable Morphologies
- Conference: AIChE Annual Meeting
- Year: 2020
- Proceeding: 2020 Virtual AIChE Annual Meeting
- Group: Catalysis and Reaction Engineering Division
- Time: Monday, November 16, 2020 - 8:00am-8:15am
In this work, we present a microfluidic strategy for facile, controlled synthesis of highly monodisperse titania microparticles with tunable morphology and phase composition, while achieving record-breaking surface areas for micron-sized particles.2,3 The flow reactor is comprised of readily available off-the-shelf components and features a flow-focusing configuration. The developed microfluidic reactor enables continuous microparticle formation with excellent control over microparticle size, surface area, morphology, and crystallinity through the implementation of in-line photo crosslinking of a sacrificial polymeric scaffold. The combination of in-line photocuring and utilization of a polar aprotic solvent as the continuous phase in the microfluidic reactor enables excellent control over process-structure-properties of in flow-synthesized titania microparticles which were previously inaccessible due to the presence of water- and air-sensitive precursors. The available range of precursor compositions in the developed microfluidic synthesis strategy enables on-demand manufacturing of a wide variety of microparticle morphologies, including hollow shell, yolk-shell, macroporous, and dense microspheres, as well as surface areas as high as 360 m2g-1 with diameters ranging from 5 to 250 Î¼m.
1 T. Zhao et al. Nano Energy, 2016, 26, 16â25.
2 Z. S. Campbell et al. Chem. Mater., 2018, 30, 8948â8958.
3 Z. S. Campbell et al. RSC Adv., 2020, 10, 8340â8347.