Catalytic oxidation of methylene blue by dendrimer encapsulated silver and gold nanoparticles

Ali K. Ilunga, Reinout Meijboom

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)

Abstract

The catalytic oxidation of methylene blue was investigated in the presence of dendrimer generation five terminated NH2 encapsulated silver (AgDENs), and gold (AuDENs) nanoparticles as catalyst. The synthesis process of encapsulated metal nanoparticles were monitored by UV/vis spectrophotometry and their average diameters determined by transmission electron microscopy analysis, respectively. The kinetics was monitored using UV/vis spectrophotometry, under pseudo-first order conditions, resulting in observed rate constants kobs. Langmuir-Hinshelwood approach was applied to model the kinetic process. The adsorption of methylene blue on the catalyst surface is related to the type of metal nanoparticle present, and presents the rate-determining step.

Original languageEnglish
Pages (from-to)48-60
Number of pages13
JournalJournal of Molecular Catalysis A: Chemical
Volume411
DOIs
Publication statusPublished - 1 Jan 2016

Keywords

  • Adsorption
  • Dendrimer
  • Gold nanoparticles
  • Kinetics
  • Langmuir-Hinshelwood
  • Methylene blue
  • Oxidation
  • Silver nanoparticles

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology
  • Physical and Theoretical Chemistry

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