Synthesis and intercalation of silver nanoparticles in kaolinite/DMSO complexes

Rita Patakfalvi, Imre Dékány

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Ag nanoparticles were synthesized in the interlamellar space of a layered kaolinite. Disaggregation of the lamellae of the nonswelling kaolinite was achieved by the intercalation of dimethyl sulfoxide (DMSO). The kaolinite was suspended in aqueous AgNO3 solution and the adsorbed Ag+ ions were reduced on the surface of kaolinite lamellae with NaBH4 or UV light irradiation. The silver nanoparticles formed were characterized by X-ray diffraction (XRD), small angle X-ray scattering (SAXS), and transmission electron microscopy (TEM). We studied the effects of the two reduction methods on the size and the size distribution of Ag nanoparticles and how clay mineral structure is altered as a consequence of particle formation. It was established that the size of Ag nanoparticles depends on both silver content and the reduction method. Photoreduction of silver led to the formation of relatively large Ag nanoparticles (diameter 8-14 nm).

Original languageEnglish
Pages (from-to)149-159
Number of pages11
JournalApplied Clay Science
Volume25
Issue number3-4
DOIs
Publication statusPublished - Jun 1 2004

Keywords

  • Intercalation
  • Kaolinite
  • SAXS
  • Silver nanoparticles
  • XRD

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

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