Hierarchical micro-to-macroporous silica nanoparticles obtained by their grafting with hyper-crosslinked resin

Autor: Marco Guerritore, Federico Olivieri, Roberto Avolio, Rachele Castaldo, Mariacristina Cocca, Maria Emanuela Errico, Marino Lavorgna, Brigida Silvestri, Veronica Ambrogi, Gennaro Gentile
Přispěvatelé: Guerritore, Marco, Olivieri, Federico, Avolio, Roberto, Castaldo, Rachele, Cocca, Mariacristina, Emanuela Errico, Maria, Lavorgna, Marino, Silvestri, Brigida, Ambrogi, Veronica, Gentile, Gennaro
Rok vydání: 2022
Předmět:
Zdroj: Microporous and mesoporous materials
335 (2022). doi:10.1016/j.micromeso.2022.111864
info:cnr-pdr/source/autori:Guerritore, Marco; Olivieri, Federico; Avolio, Roberto; Castaldo, Rachele; Cocca, Mariacristina; Errico, Maria Emanuela; Lavorgna, Marino; Silvestri, Brigida; Ambrogi, Veronica; Gentile, Gennaro/titolo:Hierarchical micro-to-macroporous silica nanoparticles obtained by their grafting with hyper-crosslinked resin/doi:10.1016%2Fj.micromeso.2022.111864/rivista:Microporous and mesoporous materials (Print)/anno:2022/pagina_da:/pagina_a:/intervallo_pagine:/volume:335
ISSN: 1387-1811
DOI: 10.1016/j.micromeso.2022.111864
Popis: In this work, mesoporous silica nanoparticles (MSN) hybridized with an organosilane are grafted with hyper-crosslinked poly(vinylbenzyl chloride) (PVBC), which is anchored into the mesopores and onto the external surface of MSN. The obtained nanoparticles are characterized by a MSN-templated hierarchical porosity composed of micropores, mesopores and macropores originated from the hyper-crosslinking of the PVBC phase, with a microporous fraction reaching up to 28% of the total pore volume. Tested for the adsorption of a model dye (Rhodamine 6G, Rh6G), these nanoparticles result much more efficient in Rh6G adsorption with respect to plain MSN, showing a Rh6G uptake of about 125 mg/g in highly concentrated solutions (1000 mg/L) and quite complete removal (about 98%) of the dye in more diluted conditions (30 mg/L) with comparable efficiency in repeated adsorption cycles. Overall results demonstrate the key role of the hierarchical porosity of the hyper-crosslinked PVBC-grafted MSN to tailor their adsorption properties.
Databáze: OpenAIRE
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