title: Highly Efficient Reusable Sponge-Type Catalyst Carriers Based on Short Electrospun Fibers.
abstract: This study reports on gold nanoparticles (AuNPs) immobilized in a sponge made of short electrospun fibers (Au-sponge), which show surprisingly high reaction rates at extremely low gold amount. Au-sponges are made by freeze-drying of dispersions of short electrospun fibers with preimmobilization of AuNPs. The resulting Au-sponges show very low densities around 7 mg cm-3corresponding to a pore volume of about 150 mL g-1, but low surface area and very low amount of AuNPs in the range of 0.29-3.56 wt%. In general, catalysts with immobilized AuNPs show much low reaction rates compared to systems with dispersed AuNPs. By contrast, the Au-sponge catalyst with immobilized AuNPs is discerned here as an extremely efficient catalyst even superior to other systems with dispersed AuNPs. The fidelity of the Au-sponges after reactions is good enough for manifold use and thereby provides a sustainable catalyst design as well.
authors.affiliation: Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
authors.forename: Gaigai
authors.initials: G
authors.lastname: Duan
authors.affiliation: Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
authors.forename: Melissa
authors.initials: M
authors.lastname: Koehn-Serrano
authors.affiliation: Macromolecular Chemistry, Bavarian Polymer Institute, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Greiner
mesh_terms: D001577:Benzophenones / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D011145:Polyvinyls / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties
chemical_list: D001577:Benzophenones; D011145:Polyvinyls; D006046:Gold
keywords: catalysis; electrospinning; fibrous sponge; gold nanoparticle; reaction rate