title: Simultaneous AuIIIExtraction and In Situ Formation of Polymeric Membrane-Supported Au Nanoparticles: A Sustainable Process with Application in Catalysis.
abstract: A polymeric membrane-supported catalyst with immobilized gold nanoparticles (AuNPs) was prepared through the extraction and in situ reduction of AuIIIsalts in a one-step strategy. Polymeric inclusion membranes (PIMs) and polymeric nanoporous membranes (PNMs) were tested as different membrane-support systems. Transport experiments indicated that PIMs composed of cellulose triacetate, 2-nitrophenyloctyl ether, and an aliphatic tertiary amine (Adogen 364 or Alamine 336) were the most efficient supports for AuIIIextraction. The simultaneous extraction and reduction processes were proven to be the result of a synergic phenomenon in which all the membrane components were involved. Scanning electron microscopy characterization of cross-sectional samples suggested a distribution of AuNPs throughout the membrane. Transmission electron microscopy characterization of the AuNPs indicated average particle sizes of 36.7 and 2.9 nm for the PIMs and PNMs, respectively. AuNPs supported on PIMs allowed for >95.4 % reduction of a 0.05 mmol L-14-nitrophenol aqueous solution with 10 mmol L-1NaBH4solution within 25 min.
authors.affiliation: Departamento de Química Analítica, Facultad de Química, UNAM, Ciudad Universitaria, 04510, D.F., México.
authors.forename: Lucía
authors.identifier: 0000-0001-5532-6866
authors.initials: L
authors.lastname: Mora-Tamez
authors.affiliation: Departamento de Química Analítica, Facultad de Química, UNAM, Ciudad Universitaria, 04510, D.F., México.
authors.forename: Vicente
authors.identifier: 0000-0003-4876-7318
authors.initials: V
authors.lastname: Esquivel-Peña
authors.affiliation: Departamento de Química Analítica, Facultad de Química, UNAM, Ciudad Universitaria, 04510, D.F., México.
authors.forename: Ana L
authors.identifier: 0000-0001-9595-3901
authors.initials: AL
authors.lastname: Ocampo
authors.affiliation: Departamento de Química Analítica, Facultad de Química, UNAM, Ciudad Universitaria, 04510, D.F., México.
authors.forename: Eduardo
authors.identifier: 0000-0001-6465-9363
authors.initials: E
authors.lastname: Rodríguez de San Miguel
authors.affiliation: Équipe "Systèmes Polymères Complexes", Institut de Chimie et des Matériaux Paris-Est, UMR 7182 CNRS Université Paris-Est Créteil, 2 rue Henri Dunant, 94320, Thiais, France.
authors.forename: Daniel
authors.initials: D
authors.lastname: Grande
authors.affiliation: Departamento de Química Analítica, Facultad de Química, UNAM, Ciudad Universitaria, 04510, D.F., México.
authors.forename: Josefina
authors.identifier: 0000-0002-7756-0415
authors.initials: J
authors.lastname: de Gyves
mesh_terms: D000627:Aminophenols / Q000737:chemistry; D002384:Catalysis; D006046:Gold / Q000737:chemistry* / Q000302:isolation & purification*; D055772:Green Chemistry Technology; D008567:Membranes, Artificial; D053768:Metal Nanoparticles / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000627:Aminophenols; D008567:Membranes, Artificial; D009596:Nitrophenols; D011108:Polymers; D014867:Water; D006046:Gold; C026729:4-aminophenol; C024836:4-nitrophenol
keywords: catalytic membranes; gold; in situ reduction; nanoparticles; supported catalysts