Abstract
We describe the synthesis of porous spherical nanoaggregates derived by the controlled growth of zeolite LTA on a poliamidoamine (Pamam) dendrimer acting as nano-template. The presence of a strong condensed cationic Na+charge all around the dendrimers, which is responsible for the intense electrostatic inter-particle interaction potential, stimulate the condensed growth of the zeolitic phase onto the dendrimer substrate. Moreover, the screening produced by the zeolite grown on the dendrimer surface promote the entanglement process between the primary units with the formation of large porous clusters. The main features of the self-assembly process has been characterised by means of different techniques such as Small Angle X-ray Scattering (SAXS), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD) and Energy Dispersive X-ray (EDX) microprobe spectroscopy. The finding of our results may open new perspectives in the synthesis of organic–inorganic nanostructured materials based on mesoporous frameworks with new characteristics and properties.
Highlights
There has been increasing interest in the synthesis, characterization and processing of novel materials with controlled structural characteristics [20,30]
On the other hand the development of alternative protocols for the organic templating growth of inorganic materials represents an emerging reality due for the interest in the fabrication of new types of porous hybrid materials with peculiar structure and functions [2,7]. These approaches, which are based on the use of a specific macromolecular template, consists in the controlled spatial growth of nanosized macromolecular assemblies which result in the formation of defect free, higher-order structures like membranes, films, coatings [11, 34]. Such self-assembly recently attracted a sensitive attention in material science [9,16,19,25,26,36] due for the important implications in the improvement of the models and theoretical approaches describing the relavant assembly mechanism involved in material science
We describe the synthesis of spherical nanoaggregates derived by the controlled growth of zeolite LTA on a carboxyl-terminated poliamidoamine (Pamam) dendrimer
Summary
There has been increasing interest in the synthesis, characterization and processing of novel materials with controlled structural characteristics [20,30]. These approaches, which are based on the use of a specific macromolecular template, consists in the controlled spatial growth of nanosized macromolecular assemblies which result in the formation of defect free, higher-order structures like membranes, films, coatings [11, 34].
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