Preparation of Gold Nanorods@C Hollow Capsules and Applications in Catalysis

doi:10.7503/cjcu20130505

Abstract

Abstract:

Hollow capsules with gold nanorods(GNRs) embedding in the carbon shell were prepared by polypyrrole(PPy) as carbon precursor. The carboxylic-capped polystyrene(PS) nanoparticles were firstly synthesized, then the hexadecyl trimethyl ammonium bromide-stabilized GNRs were self-assembled onto their surface through the electrostatic interaction, and formed PS@GNRs composites. Next, PPy was coated on the surface of PS@GNRs composites; meanwhile, GNRs were embedded in the PPy shell. After calcination in nitrogen atmosphere, the PPy shell was carbonized to the carbon shell and the PS nanoparticles decomposed at the same time. During heat-treatment process, GNRs preserved rod-like morphology without aggregations due to the protection of carbon shell. Upon varying the concentration of pyrrole monomer, both PPy and carbon shell thicknesses could be readily turned. The GNRs@C hollow capsules showed excellent catalytic performance in the reduction of methylene blue with sodium borohydride as reducing agent.

Key words: Polypyrrole, Gold nanorod, Hollow capsule, Catalytic performance

CLC Number:

O631

TrendMD:

YAO Tong-Jie, CUI Tie-Yu, FANG Xue, CUI Fang, WU Jie. Preparation of Gold Nanorods@C Hollow Capsules and Applications in Catalysis[J]. Chem. J. Chinese Universities, 2013, 34(10): 2421.

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