Direct deposition of gold nanoparticles onto polymer beads and glucose oxidation with H 2O 2

Abstract

Gold nanoparticles (Au NPs) were deposited directly from aqueous solution of diethylenediaminegold(III) complex onto polymer beads commercially available, such as poly(methyl methacrylate) (PMMA), polystyrene (PS), and polyaniline (PANI) without surface modification. The dropwise addition of NaBH 4 to reduce Au(III) was found to be very effective to obtain small Au(0) NPs with a narrow size distribution except for PANI. The catalytic performance of Au NPs deposited on polymer beads for H 2O 2 decomposition and glucose oxidation with H 2O 2 were more significantly affected by the kinds of polymer supports than by the size of Au NPs. The equimolar oxidation of glucose with H 2O 2 could be operated by controlling the decomposition rate of H 2O 2 over Au/PMMA.