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Gold nanoparticles-coated chemically-reactive polymer colloids and the study of their catalytic kinetics

Published online by Cambridge University Press:  18 March 2014

Maolin Li ,
Vivian Zhong  and
Guofang Chen
Vivian Zhong
Affiliation:
Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Queens, NY 11439, U.S.A
Guofang Chen*
Affiliation:
Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Queens, NY 11439, U.S.A
*
*Email: cheng@stjohns.edu
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Abstract

Raspberry-like composite spheres based on chemically-reactive poly(glycidyl methacrylate) (PGMA) colloids as the cores coated with tunable size of gold nanoparticles were synthesized via a controlled assembly method. Kinetic study of 4-nitrophenol reduction by NaBH4 in the presence of poly(allylamine hydrochloride)-modified PGMA composite with tunable size of AuNPs (PGMA@PAH@AuNPs) was demonstrated. Effects of gold nanoparticles size and PGMA colloid diameter on the reaction time, average reaction rate and average turnover frequency (TOF), order of reaction (n) and apparent rate constant (kapp) were systematically investigated. Experimental results of our study showed composites with 3.4 ± 0.9 nm AuNPs have the best catalytic efficiency with the highest reaction order and apparent rate constant. The poisoning of product 4-aminophenol on PAH-modified PGMA colloid-supported gold nanocatalysts was evaluated using 4-nitrophenol/NaBH4 reduction reaction for the reaction time, average reaction rate, average TOF, order of reaction and apparent rate constant.

Keywords

compositecatalyticnanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1641: Symposium AA – Catalytic Nanomaterials for Energy and Environment , 2014 , mrsf13-1641-aa01-03
Copyright
Copyright © Materials Research Society 2014 

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