Reduction of 4-nitrophenol to 4-aminophenol over Au nanoparticles deposited on PMMA

被引：604

作者：

Kuroda, Kyoko ^{[1
,2
]}

Ishida, Tamao ^{[1
,2
]}

Haruta, Masatake ^{[1
,2
]}

机构：

[1] Tokyo Metropolitan Univ, Grad Sch Urban Environm Sci, Dept Appl Chem, Tokyo 1920397, Japan

[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2009年 / 298卷 / 1-2期

基金：

日本学术振兴会;

关键词：

Gold nanoparticles; Polymer supported catalyst; 4-Nitrophenol reduction; GOLD NANOPARTICLES; CATALYTIC-PROPERTIES; AEROBIC OXIDATION; NANOCLUSTERS; NANOCOMPOSITES; ALCOHOLS;

D O I：

10.1016/j.molcata.2008.09.009

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Gold nanoparticles (Au NPs) were directly deposited on commercially available poly(methyl methacrylate) (PMMA) beads by the deposition reduction method by adding dropwise of NaBH4 into the aqueous solution of Au(en)(2)Cl-3. The average diameter of Au NPs was 6.9 nm and, in contrast to the case of rapid addition, there were no aggregated particles larger than 20 nm. Catalytic activity of Au/PMMA was tested for the reduction of 4-nitrophenol to 4-aminophenol with an excess amount of NaBH4. Gold NPs on PMMA showed the highest catalytic activity among polymer supported Au NPs previously reported. The reaction rate is the pseudo-first-order with respect to 4-nitrophenol. The pseudo-first-order rate constant and the activation energy were estimated to be 7.2-7.9 x 10(-3) s(-1) at 295 K and 38 kJ mol(-1), respectively. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：7 / 11

页数：5

共 22 条

[1] Microgel-stabilized gold nanoclusters: Powerful "quasi-homogeneous" catalysts for the aerobic oxidation of alcohols in water [J].