Catalytic reduction of 4-nitrophenol by magnetically recoverable Au nanocatalyst

Yang Chuang Chang, Dong Hwang Chen

研究成果: Article同行評審

510 引文 斯高帕斯(Scopus)

摘要

A novel magnetically recoverable Au nanocatalyst was fabricated by the simple adsorption-reduction of Au(III) ions on chitosan-coated iron oxide magnetic nanocarrier. Au nanoparticles with a mean diameter of 3.14 nm were well loaded on the surface of magnetic nanocarrier because chitosan layer provided an effective driving force in the formation and stabilization of Au nanoparticles. The resultant magnetically recoverable Au nanocatalyst exhibited excellent catalytic activity to the reduction of 4-nitrophenol (4-NP) with sodium borohydride. The rate constants evaluated in terms of pseudo-first-order kinetic model increased with increasing the amount of Au nanocatalyst, decreasing the initial 4-NP concentration, and increasing the temperature. Also, the kinetic data suggested that this catalytic reaction was diffusion controlled owing to the presence of chitosan layer. In addition, catalyst reuse showed no trace of deactivation or poisoning during the catalytic and separation processes, revealing the stable nature and good catalytic ability of this nanocatalyst.

原文English
頁(從 - 到)664-669
頁數6
期刊Journal of Hazardous Materials
165
發行號1-3
DOIs
出版狀態Published - 2009 6月 15

All Science Journal Classification (ASJC) codes

  • 環境工程
  • 環境化學
  • 廢物管理和處置
  • 污染
  • 健康、毒理學和誘變

指紋

深入研究「Catalytic reduction of 4-nitrophenol by magnetically recoverable Au nanocatalyst」主題。共同形成了獨特的指紋。

引用此