Synthesis and characterization of silver nanoparticle/kaolinite composites

Rita Patakfalvi, Albert Oszkó, Imre Dékány

Research output: Article

100 Citations (Scopus)

Abstract

Ag nanoparticles were synthetized in the interlamellar space of a layered kaolinite clay mineral. Disaggregation of the lamellae of non-swelling kaolinite was achieved by intercalation of dimethyl sulfoxide. The kaolinite was suspended in aqueous AgNO3 solution and, after adsorption of Ag+, the ions were reduced with NaBH4. The interlamellar space limits particle growth (dave=3.8-4.2 nm); however, larger silver particles may be formed on the exterior surface of kaolinite with dave=5.6-10.5 nm diameter. The diameter of the particles prepared in this way is depending on the initial AgNO3 concentration. The silver nanoparticles prepared were characterized by UV-vis spectroscopy, X-ray diffraction (XRD), Small angle X-ray scattering (SAXS), X-ray photoelectron spectroscopy (XPS) and Transmission electron microscopy (TEM).

Original languageEnglish
Pages (from-to)45-54
Number of pages10
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume220
Issue number1-3
DOIs
Publication statusPublished - jún. 30 2003

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ASJC Scopus subject areas

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

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