title: Facile synthesis of highly dispersed palladium/polypyrrole nanocapsules for catalytic reduction of p-nitrophenol.
abstract: In this study, a facile one-step redox polymerization method for the preparation of highly dispersed palladium (Pd)/polypyrrole (PPy) nanocapsules has been demonstrated. During the polymerizaion process, the formation of RB-PdCl(4)(2-) complex via an electrostatic interaction plays a key role for the preparation of Pd/PPy composite nanocapsules. The well-dispersed Pd nanocrystals with small sizes of 2-4 nm embedded in PPy nanocapsules exhibited a good catalytic activity during the catalytic reduction of p-nitrophenol into p-aminophenol by NaBH(4) in aqueous solution. The kinetic apparent rate constant (k(app)) was about 8.87×10(-3) s(-1). Moreover, the as-prepared Pd/PPy composite nanocapsules exhibited a good reusability, which could be repeatedly used for the reduction of p-nitrophenol with a high catalytic activity for at least 10 successive cycles.
authors.affiliation: Alan G. MacDiarmid Institute, College of Chemistry, Jilin University, Changchun, PR China.
authors.forename: Yanpeng
authors.initials: Y
authors.lastname: Xue
authors.forename: Xiaofeng
authors.initials: X
authors.lastname: Lu
authors.forename: Xiujie
authors.initials: X
authors.lastname: Bian
authors.forename: Junyu
authors.initials: J
authors.lastname: Lei
authors.forename: Ce
authors.initials: C
authors.lastname: Wang
mesh_terms: D000627:Aminophenols / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D053769:Nanocapsules / Q000737:chemistry*; D009596:Nitrophenols / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry*; D010316:Particle Size; D058105:Polymerization; D011108:Polymers / Q000737:chemistry*; D011758:Pyrroles / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D000627:Aminophenols; D053769:Nanocapsules; D009596:Nitrophenols; D009942:Organometallic Compounds; D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole; D010165:Palladium; C026729:4-aminophenol; C024836:4-nitrophenol