Hybrid Mesoporous Materials with Functionalized Monolayers

Abstract

Mesoporous materials have great potential for environmental and industrial processes, but many applications require the materials to exhibit specific surface chemistry and binding sites. A new approach has been developed so that organized functional monolayers are covalently bound to mesoporous supports. The functionalized hybrid materials show exceptional selectivity and capacity for removing heavy metals from waste streams. Tailored hybrid materials have also shown potential to selectively bind anions and radionuclides. Rational design of the surface properties of mesoporous materials will lead to more sophisticated functional composites.

Preparation and characterisation of a Ni2+/Co2+-cyclam modified mesoporous cellular foam for the specific immobilisation of His6-alanine racemase

“…Post-synthesis functionalisation involves the grafting of functional groups such as alkoxy, silyl and amines onto surfaces of materials [60][61][62][63] . This can be performed by refluxing the silicate with the desired alkoxy-silane in a suitable solvent (Figure 1-3).…”

Photonic and nanobiophotonic properties of luminescent lanthanide-doped hybrid organic–inorganic materials

“…One of the methods involves preparing the films and then backfilling the pores with the desired molecules. [78][79][80][81][82][83][84][85] When the molecules contain alkoxysilane groups, they can be used to functionalize the newly exposed pore surfaces. For instance, the entrapment of lanthanide complexes into surface-modified mesoporous silica (MCM41, MCM48 and SBA15) by a two-step procedure has been widely studied.…”

Ion transport controlled by nanoparticle-functionalized membranes

“…Perhaps most importantly, we have demonstrated a desirable and readily attainable feature of specifically tailoring transport through a suitable choice of encapsulating ligand chemically absorbed to the NP surface. In this regard, we are able to achieve a desired functionality in a manner similar to, but distinctly different from, those using self-assembled monolayers (SAMs) [35][36][37][38][39][40][41] , b a (1), under the assumption of a fixed membrane charge density, |X|. Deviations to the model are most prevalent at low electrolyte concentration, resulting from the fact that |X| is not a constant, but depends on the electrolyte concentration as shown in the inset.…”