One-step fabrication of platelet-shaped Janus supraparticles via spray-drying

Zhou H, Prieschl J, Groppe P, Mandel K, Wintzheimer S (2024)

Publication Type: Journal article

Publication year: 2024

Journal

Powder Technology Elsevier

Book Volume: 440

Article Number: 119756

DOI: 10.1016/j.powtec.2024.119756

Abstract

Supraparticles, i.e. assemblies of nanoparticles, can be classified as Janus supraparticles if they comprise two different types of nanoparticles that are asymmetrically distributed within the supraparticles. Due to their anisotropic character, they exhibit a high potential for various applications. However, the development of a scalable and material-wise flexible method to fabricate Janus supraparticles is still a challenge. In this work, a one-step synthesis of Janus supraparticles via spray-drying is reported. The segregation of binary particle dispersions during droplet evaporation, the tunable hollowness of supraparticles, and their fragmentation due to mechanical forces in the cyclone are exploited to fabricate platelet-shaped Janus supraparticles. By varying cyclone types, weight and diameter ratio between large and small nanoparticles of binary dispersions, their solid content and ionic strength, an optimized parameter setting is achieved. The obtained understanding of how to fabricate Janus supraparticles from binary silica model dispersions is transferred to mixed silica, iron oxide, titania and alumina supraparticles. This work opens a door for fabricating platelet-shaped Janus supraparticles in a fast and scalable manner.

Authors with CRIS profile

Huanhuan Zhou Professur für Anorganische Chemie Philipp Groppe Professur für Anorganische Chemie Karl Mandel Professur für Anorganische Chemie Susanne Wintzheimer Professur für Anorganische Chemie

Involved external institutions

Fraunhofer Institut für Silicatforschung (ISC) DE Germany (DE)

How to cite

APA:

Zhou, H., Prieschl, J., Groppe, P., Mandel, K., & Wintzheimer, S. (2024). One-step fabrication of platelet-shaped Janus supraparticles via spray-drying. Powder Technology, 440. https://doi.org/10.1016/j.powtec.2024.119756

MLA:

Zhou, Huanhuan, et al. "One-step fabrication of platelet-shaped Janus supraparticles via spray-drying." Powder Technology 440 (2024).

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