BROWSE

Related Researcher

Author

Kim, Byeong-Su
Soft and Hybrid Nanomaterials Lab
Research Interests
  • Carbon materials, polymer, Layer-by-Layer (LbL) assembly, hyperbranched polymer, polyglycerol (PG), bio-applications

ITEM VIEW & DOWNLOAD

Double hydrophilic block copolymer templated Au nanoparticles with enhanced catalytic activity toward nitroarene reduction

Cited 9 times inthomson ciCited 2 times inthomson ci
Title
Double hydrophilic block copolymer templated Au nanoparticles with enhanced catalytic activity toward nitroarene reduction
Author
Seo, EunyongKim, JesiHong, YunjeongKim, Yung SamLee, DaeyeonKim, Byeong-Su
Keywords
Average diameter; Catalytic system; Double-hydrophilic block copolymers; Enhanced catalytic activity; Gold nanoparticle; Reduction of nitroarenes; Turnover frequency; Water dispersible
Issue Date
201306
Publisher
AMER CHEMICAL SOC
Citation
JOURNAL OF PHYSICAL CHEMISTRY C, v.117, no.22, pp.11686 - 11693
Abstract
We present a facile method for synthesizing water-dispersible gold nanoparticles (Au NPs) using a double hydrophilic block copolymer (DHBC), poly(ethylene oxide)-block-poly(acrylic acid) (PEO-b-PAA), as a template and demonstrate their application in the reduction of nitroarenes. Selective coordinative interactions between a gold precursor and the PAA block of the DHBC lead to the formation of micelles, which are subsequently transformed into Au NPs with an average diameter of 10 nm using a reducing agent. The DHBC-templated Au NPs (Au@DHBC NPs) remain stable in water for several months without any noticeable aggregation. Furthermore, Au@DHBC NPs are found to be highly effective in catalyzing the reduction of a series of nitroarenes. Remarkably, the turnover frequency in the case of 4-nitrophenol using Au@DHBP NPs reaches 800 h-1, outperforming previously reported Au NP-based catalytic systems. We believe the enhanced catalytic activity is due to the DHBC shell around Au NPs, which templates the formation of spherical Au NPs and, more importantly, provides the confined interior for the enhanced catalytic activity in nitroarene reduction. Considering the wide potential application of DHBC as a template for the synthesis of novel metal NPs, we anticipate that the approach presented in this study will offer a new means to create a variety of water-stable catalytic nanomaterials in various fields of green chemistry.
URI
Go to Link
DOI
http://dx.doi.org/10.1021/jp4027139
ISSN
1932-7447
Appears in Collections:
SNS_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU