Polymer nanoparticles with dendrimer-Ag shell and its application in catalysis--颗粒学报PARTICUOLOGY

Dang, G., Shi, Y., Fu, Z., & Yang, W. (2013). Polymer nanoparticles with dendrimer-Ag shell and its application in catalysis. Particuology, 11(3), 346–352. https://doi.org/10.1016/j.partic.2011.06.012

Polymer nanoparticles with dendrimer-Ag shell and its application in catalysis

Gaofei Dang, Yan Shi^*, Zhifeng Fu, Wantai Yang

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China

10.1016/j.partic.2011.06.012

Volume 11, Issue 3, June 2013, Pages 346-352

Received 18 April 2011, Revised 13 June 2011, Accepted 16 June 2011, Available online 21 April 2012.

E-mail: shiyan@mail.buct.edu.cn

Highlights

► Polymer nanoparticles with dendrimer-Ag shell were prepared.

► Catalytic ability was investigated in column.

► Packing catalytic polymer particles in column improved the efficiency.

Abstract

Polymer nanoparticles with dendrimer-Ag shell were prepared and their application in catalytic reduction of 4-nitrophenol (4-NP) was investigated. Cross-linked polystyrene (PS) microspheres were prepared through dispersion copolymerization of styrene, acrylic acid and crosslinking monomer 1, 2-divinylbenzene. PS microspheres with average size of 450 nm and narrow size distribution were used as support for the immobilization of dendrimer-Ag shell. The polyamidoamine (PAMAM) dendrimer shell was successively grafted onto the surface of PS microspheres through repetitive Michael addition reaction of methyl acrylate (MA) and amidation of the obtained esters with large excess of ethylenediamine (EDA). Silver nanoparticles were formed directly inside the PAMAM shell through reduction with NaBH4. The resulting PS@PAMAM-Ag nanoparticles were packed in a stainless steel column and used successfully for catalytic reduction of 4-NP. This technique for packing catalytic polymer particles in a column could improve the efficiency of using the metal catalyst and the tedious separation in catalytic reaction.

Graphical abstract

Keywords

Polymer nanoparticles; Polyamidoamine dendrimer; Dendrimer-metal; Catalytic column; Silver nanocatalyst

文章导读