Temperature responsive copolymer as support for metal nanoparticle catalyst: A recyclable catalytic system

摘要

A recyclable catalytic system was developed by using a temperature responsive poly(acrylamide-co-acrylonitrile) (P(AAm-co-AN)) copolymer with an upper critical solution temperature (UCST). Palladium nanoparticles (NPs) immobilized on P(AAm-co-AN) copolymer were synthesized by the chemical reduction method using NaBH4. TEM characterizations showed the highly dispersed and small (similar to 3 nm) Pd nanoparticles formed on the surface of the P(AAm-co-AN) copolymer. UV-Vis measurements indicated the increase of UCST of P(AAm-co-AN) from 30 to 35 degrees C after the deposition of Pd metal. P(AAm-co-AN) supported Pd catalyst showed high activity in allyl alcohol hydrogenation and facile separation and recovery via sharp solubility changes of catalyst by cooling below UCST. (C) 2017 Elsevier B.V. All rights reserved.