One-pot green synthesis of silver/iron oxide composite nanoparticles for 4-nitrophenol reduction

Jau Rung Chiou, Bo Hung Lai, Kai Chih Hsu, Dong Hwang Chen

Research output: Contribution to journalArticlepeer-review

220 Citations (Scopus)

Abstract

Silver/iron oxide composite nanoparticles have been synthesized successfully via a facile one-pot green route by the use of l-arginine, which created an aqueous solution of about pH 10 and acted as a reducing agent for the successive formation of iron oxide and Ag nanoparticles. The product was characterized to be silver-coated iron oxide and iron oxide hydroxide composite nanoparticles with a mean diameter of about 13.8. ±. 3.0. nm and 8.53% of Ag in weight. It exhibited good catalytic activity for the reduction of 4-nitrophenol to 4-aminophenol with sodium borohydride. The reduction reaction followed the pseudo-first-order kinetics. The corresponding rate constants increased with the increases of temperature and catalyst amount but decreased with the increase of initial 4-NP concentration, revealing an activation energy of 28.2. kJ/mol and a diffusion controlled mechanism. In addition, this product had quite good stability. No significant activity loss was observed after reuse for 5 cycles.

Original languageEnglish
Pages (from-to)394-400
Number of pages7
JournalJournal of Hazardous Materials
Volume248-249
Issue number1
DOIs
Publication statusPublished - 2013 Mar 5

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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