Enhanced catalytic activity of gold nanoparticles doped in a mesoporous organic gel based on polymeric phloroglucinol carboxylic acid-formaldehyde

Yang, Han ; Nagai, Keiji ; Abe, Toshiyuki ; Homma, Hirofumi ; Norimatsu, Takayoshi ; Ramaraj, Ramasamy (2009) Enhanced catalytic activity of gold nanoparticles doped in a mesoporous organic gel based on polymeric phloroglucinol carboxylic acid-formaldehyde ACS Applied Materials & Interfaces, 1 (9). pp. 1860-1864. ISSN 1944-8244

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Official URL: http://pubs.acs.org/doi/abs/10.1021/am900447c

Related URL: http://dx.doi.org/10.1021/am900447c

Abstract

Gold nanoparticles were supported by a phloroglucinolcarboxylic acid-formaldehyde (PF) gel, a new organic gel with a 30 nm spheroid-like structure. The surface area of the PF gel with gold nanoparticles was 550 m2/g. Gold nanoparticles supported on a PF gel exhibited catalytic activity in the reduction of 4-nitrophenol with a reaction rate constant of 7.4 × 10-3 s-1, which is high in the reported heterogeneous reaction system. The adsorption behavior of 4-nitrophenol into the gel support was observed by ultraviolet-visible absorption spectroscopy. Gold nanoparticles in the PF network were characterized by scanning electron microscopy, atomic force microscopy, and transmission electron microscopy observation. The high reduction rate would be attributed to the extraction and diffusion of the reactant through the pores of a PF gel support to encounter the highly dispersed gold nanoparticles on the surface and inside the material.

Item Type:Article
Source:Copyright of this article belongs to American Chemical Society.
Keywords:Mesoporous Support; Organic Gel; Gold Nanoparticles; Catalysis; Reduction; 4-nitrophenol
ID Code:39717
Deposited On:14 May 2011 14:21
Last Modified:18 May 2011 07:18

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