Catalytic membranes prepared using layer-by-layer adsorption of polyelectrolyte/metal nanoparticle films in porous supports.
Layer-by-layer adsorption of polyelectrolytes and gold nanoparticles within porous supports provides a convenient method for forming catalytic membranes. The polyelectrolyte film effectively immobilizes the gold nanoparticles without inhibiting access to catalytic sites, as shown by the similar rate constants for nanoparticle-catalyzed 4-nitrophenol reduction in solution and in membranes. Modified alumina membranes reduce >99% of 0.4 mM 4-nitrophenol at linear flow rates of 0.98 cm/s, and the modification process is also applicable to track-etched polycarbonate supports.
Dotzauer
David M
DM
Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA.
Dai
Jinhua
J
Sun
Lei
L
Bruening
Merlin L
ML
D000327:Adsorption; D002384:Catalysis; D003460:Crystallization / Q000379:methods*; D004573:Electrolytes / Q000737:chemistry*; D008422:Materials Testing; D008567:Membranes, Artificial; D008670:Metals / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D016062:Porosity; D013499:Surface Properties
D004573:Electrolytes; D008567:Membranes, Artificial; D008670:Metals