Functionalized silica materials synthesized via co-condensation and post-grafting methods

Ana Maria Putz, L. Almásy, Adél Len, Cătălin Ianăşi

Research output: Article

Abstract

Mesoporous silica particles have been prepared with functionalized precursors, used either in situ co-condensation process or as post-synthesis grafting agents, in order to deliver surface functionalisation. Aminopropyl, mercaptopropyl, vinyl and hexyl organosilanes were used as funtionalized precursors, tetraethyl orthosilicate as the base silica precursor material, hexadecyl-trimethylammonium bromide (CTAB) as directing agent and water-ethanol mixture as solvent, with ammonia catalyst. The aim was to explore the effect of various recipes on the structural properties of the composite materials. The samples’ microstructures have been evaluated using nitrogen sorption and small angle neutron scattering. Ordered mesoporous structures were obtained, for almost all synthesis conditions, after the solvent-extraction of the template agent. Only in one case, for the materials functionalized by mercaptopropyl groups in co-condensation route, disordered amorphous structure was obtained. All samples functionalized by post-grafting presented well-ordered mesoporous structures. The results have potential use for easy design of sorbent materials for drug loading or pollutant adsorption applications.

Original languageEnglish
Pages (from-to)323-332
Number of pages10
JournalFullerenes Nanotubes and Carbon Nanostructures
Volume27
Issue number4
DOIs
Publication statusPublished - ápr. 3 2019

Fingerprint

Silicon Dioxide
Condensation
condensation
Silica
silicon dioxide
tetraethyl orthosilicate
solvent extraction
sorbents
Solvent extraction
synthesis
Neutron scattering
Sorbents
Bromides
Ammonia
sorption
contaminants
Sorption
Structural properties
bromides
ammonia

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry
  • Organic Chemistry

Cite this

Functionalized silica materials synthesized via co-condensation and post-grafting methods. / Putz, Ana Maria; Almásy, L.; Len, Adél; Ianăşi, Cătălin.

In: Fullerenes Nanotubes and Carbon Nanostructures, Vol. 27, No. 4, 03.04.2019, p. 323-332.

Research output: Article

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