abstract
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 the diameter 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.
keywords
SPHERICAL SILICA; SPHERES; NANOSPHERES; FUNCTIONALIZATION; BIOCOMPATIBILITY; TRANSFORMATION; CONDENSATION; COSURFACTANT; FABRICATION; HYDROLYSIS
subject category
Materials Science
authors
El Moujarrad, I; Le Parc, R; Carcel, C; Toquer, G; Trens, P; Maurin, D; Gauthier, C; Gary-Bobo, M; Dieudonné, P; Carlos, LD; Man, MWC; Bantignies, JL
our authors
Luís Carlos
Full professorProjects
CICECO - Aveiro Institute of Materials (UIDB/50011/2020)
CICECO - Aveiro Institute of Materials (UIDP/50011/2020)
Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)
acknowledgements
We acknowledge Said Tahir (L2C, Montpellier, France) for SEM analyses and Dr Erwan Oliviero and Franck Godiard (Plateforme Microscopie Electronique et Analytique, University of Montpellier) for TEM experiments. Infrared measurements were carried out on the IRRAMAN technological platform of the University of Montpellier. This project is supported by the LabEx NUMEV within the I-Site MUSE and was also developed within the scope of the projects CICECO-Aveiro Institute of Materials (UIDB/50011/2020, UIDP/50011/2020 and LA/P/0006/2020) and The Shape of Water (PTDC/NAN-PRO/3881/2020) financed by Portuguese funds through the FCT/MEC (PIDDAC). IEM thanks LabEx NUMEV and The Shape of Water FCT project for the PhD co-tutelle grant.