Limits...
Polymer-stabilized palladium nanoparticles for catalytic membranes: ad hoc polymer fabrication.

Domènech B, Muñoz M, Muraviev DN, Macanás J - Nanoscale Res Lett (2011)

Bottom Line: This paper reports the intermatrix synthesis of Pd0 nanoparticles in sulfonated polyethersulfone with Cardo group membranes and their use as nanocomposite catalytic membrane reactors.The synthesized polymer and the corresponding nanocomposite were characterized by spectroscopic and microscopic techniques.The catalytic efficiency of catalytic membranes was evaluated by following the reduction of p-nitrophenol in the presence of NaBH4.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemical Engineering, UPC, C/Colom, 1, 08222 Terrassa, Barcelona, Spain. Jorge.Macanas@upc.edu.

ABSTRACT
Metal nanoparticles are known as highly effective catalysts although their immobilization on solid supports is frequently required to prevent aggregation and to facilitate the catalyst application, recovery, and reuse. This paper reports the intermatrix synthesis of Pd0 nanoparticles in sulfonated polyethersulfone with Cardo group membranes and their use as nanocomposite catalytic membrane reactors. The synthesized polymer and the corresponding nanocomposite were characterized by spectroscopic and microscopic techniques. The catalytic efficiency of catalytic membranes was evaluated by following the reduction of p-nitrophenol in the presence of NaBH4.

No MeSH data available.


Structural unit of sulfonated polyethersulfone with Cardo group (SPES-C) in its acid form.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211501&req=5

Figure 1: Structural unit of sulfonated polyethersulfone with Cardo group (SPES-C) in its acid form.

Mentions: The application of the IMS technique implies that the matrix polymer must bear some functional groups (e.g., sulfonic or carboxylic) capable to bind metal ions (PSMNP precursors). Yet, the presence of these groups is known to increase the hydrophilicity of the polymer, which can hinder, in some cases, the preparation of membranes with the required properties. For example, sulfonated poly(etheretherketone) has already proved to be a very suitable matrix for IMS of various PSMNPs [11,12], but it cannot be used for the preparation of catalytic membranes by phase inversion technique15 due to the following reasons: (1) its high hydrophilicity and (2) quite low mechanical stability. For this reason, a compromise needs to be found for each type of application by balancing hydrophilicity and hydrophobicity. To cope with this drawback, we propose the sulfonation of polyethersulfone with Cardo group (PES-C) which has a very hydrophobic group in its skeleton (a five-member lactone ring of a phenolphthalein moiety) but whose sulfonation can be done in a simple way [16]. The resulting structure of sulfonated PES-C (SPES-C) is shown in Figure 1.


Polymer-stabilized palladium nanoparticles for catalytic membranes: ad hoc polymer fabrication.

Domènech B, Muñoz M, Muraviev DN, Macanás J - Nanoscale Res Lett (2011)

Structural unit of sulfonated polyethersulfone with Cardo group (SPES-C) in its acid form.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211501&req=5

Figure 1: Structural unit of sulfonated polyethersulfone with Cardo group (SPES-C) in its acid form.
Mentions: The application of the IMS technique implies that the matrix polymer must bear some functional groups (e.g., sulfonic or carboxylic) capable to bind metal ions (PSMNP precursors). Yet, the presence of these groups is known to increase the hydrophilicity of the polymer, which can hinder, in some cases, the preparation of membranes with the required properties. For example, sulfonated poly(etheretherketone) has already proved to be a very suitable matrix for IMS of various PSMNPs [11,12], but it cannot be used for the preparation of catalytic membranes by phase inversion technique15 due to the following reasons: (1) its high hydrophilicity and (2) quite low mechanical stability. For this reason, a compromise needs to be found for each type of application by balancing hydrophilicity and hydrophobicity. To cope with this drawback, we propose the sulfonation of polyethersulfone with Cardo group (PES-C) which has a very hydrophobic group in its skeleton (a five-member lactone ring of a phenolphthalein moiety) but whose sulfonation can be done in a simple way [16]. The resulting structure of sulfonated PES-C (SPES-C) is shown in Figure 1.

Bottom Line: This paper reports the intermatrix synthesis of Pd0 nanoparticles in sulfonated polyethersulfone with Cardo group membranes and their use as nanocomposite catalytic membrane reactors.The synthesized polymer and the corresponding nanocomposite were characterized by spectroscopic and microscopic techniques.The catalytic efficiency of catalytic membranes was evaluated by following the reduction of p-nitrophenol in the presence of NaBH4.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Chemical Engineering, UPC, C/Colom, 1, 08222 Terrassa, Barcelona, Spain. Jorge.Macanas@upc.edu.

ABSTRACT
Metal nanoparticles are known as highly effective catalysts although their immobilization on solid supports is frequently required to prevent aggregation and to facilitate the catalyst application, recovery, and reuse. This paper reports the intermatrix synthesis of Pd0 nanoparticles in sulfonated polyethersulfone with Cardo group membranes and their use as nanocomposite catalytic membrane reactors. The synthesized polymer and the corresponding nanocomposite were characterized by spectroscopic and microscopic techniques. The catalytic efficiency of catalytic membranes was evaluated by following the reduction of p-nitrophenol in the presence of NaBH4.

No MeSH data available.