Structural properties of palladium nanoparticles embedded in inverse microemulsions

S. Papp, I. Dékány

Research output: Article

20 Citations (Scopus)

Abstract

Pd nanoparticles were synthesized by reduction of palladium acetate by ethanol in systems containing tetrahydrofuran (THF) as dispersion medium and tetradodecylammonium bromide (TDABr)surfactant as stabilizer. The polar phase (ethanol) acts at the same time as reducing agent. THF/TDABr/ H2O inverse microemulsions containing micelles of various sizes were also prepared, and the structure of complex liquids was studied by density measurements. Sols containing nanosize Pd0 particles were synthesized within the water droplets of this micellar system. The stabilized Pd0/surfactant system was characterized by density measurements, absorption spectroscopy, and transmission electron microscopy. The stabilizing surfactant layer adsorbed on the liquid/liquid interface and on the surface of the nanoparticles (i.e., the liquid/solid interface) significantly reduced the excess volume for the palladium nanodispersion in organic solvent.

Original languageEnglish
Pages (from-to)449-458
Number of pages10
JournalColloid & Polymer Science
Volume279
Issue number5
DOIs
Publication statusPublished - 2001

Fingerprint

Microemulsions
Palladium
Structural properties
palladium
surfactants
Surface-Active Agents
tetrahydrofuran
Nanoparticles
nanoparticles
Surface active agents
bromides
Liquids
ethyl alcohol
Bromides
liquid-liquid interfaces
Ethanol
liquid-solid interfaces
Stabilizers (agents)
acetates
micelles

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Polymers and Plastics
  • Materials Chemistry
  • Colloid and Surface Chemistry

Cite this

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AU - Papp, S.

AU - Dékány, I.

PY - 2001

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AB - Pd nanoparticles were synthesized by reduction of palladium acetate by ethanol in systems containing tetrahydrofuran (THF) as dispersion medium and tetradodecylammonium bromide (TDABr)surfactant as stabilizer. The polar phase (ethanol) acts at the same time as reducing agent. THF/TDABr/ H2O inverse microemulsions containing micelles of various sizes were also prepared, and the structure of complex liquids was studied by density measurements. Sols containing nanosize Pd0 particles were synthesized within the water droplets of this micellar system. The stabilized Pd0/surfactant system was characterized by density measurements, absorption spectroscopy, and transmission electron microscopy. The stabilizing surfactant layer adsorbed on the liquid/liquid interface and on the surface of the nanoparticles (i.e., the liquid/solid interface) significantly reduced the excess volume for the palladium nanodispersion in organic solvent.

KW - Excess volume of solution

KW - Microemulsions

KW - Pd nanoparticles

KW - Stabilization of colloid particles

KW - Surfactants

KW - TEM

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