Size-tuning of hollow periodic mesoporous organosilica nanoparticles (HPMO-NPs) using a dual templating strategy

• DOI: 10.1007/s10971-023-06139-1
• Publication Date: 2023-05-29T11:01:43Z
• Authors: Imane El Moujarrad; Rozenn Le Parc; Carole Carcel; Guillaume Toquer; Philippe Trens; David Maurin; Corentin Gauthier; Magali Gary-Bobo; Philippe Dieudonné; Luís D. Carlos; Michel Wong Chi Man; Jean-Louis Bantig...
• Keywords: HPMO; Sol-gel; Silica etching; [CHIM] Chemical Sciences; Hybrid silica; Dual templating; Hard template; [PHYS] Physics [physics]

Monodispersed hollow periodic mesoporous organosilica nanoparticles (HPMO-NPs) with a controlled core cavity and a periodic mesoporous organosilica (PMO) shell are successfully synthesized using a dual templating approach. The PMO shell synthesized by the sol–gel route exhibits a hybrid organic-inorganic framework based on phenylene bridges. The HPMO spherical nanoparticles with a diameter above 500 nm were characterized using a multiscale approach through TEM, BET, SAXS, and FT-IR. They are shown to offer an open periodic mesoporosity, a hollow cavity with a size tailored by thediameter of the core template, and finally, a high surface area (833 m 2 · g−1 ). In addition, we demonstrate that, through the same approach, the size of these hollow spherical nanoparticles can be tuned. Indeed, sub-50-nm hollow nanoparticles with mesoporous shells have also been obtained. The differences observed in the textural properties of these two sizes of hollow mesoporous nano-objects are discussed.