Formation of gold nanoparticles in zeolites

A. Pestryakov, I. Tuzovskaya, E. Smolentseva, N. Bogdanchikova, F. C. Jentoft, A. Knop-Gericke

Research School of Chemistry & Applied Biomedical Sciences

Research output: Contribution to journal › Article › peer-review

Abstract

The formation of gold nanoparticles in mordenites has been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. Different states of ionic and metallic gold were detected in the zeolite cavities and on the external surface of the zeolite - Au⁺ and Au³⁺ ions, charged clusters Au_n^δ+, and neutral nanoparticles Au_m. The relative amount of these states depends on the method of sample preparation, type of redox treatment and the SiO₂/Al₂O₃ molar ratio.

Original language	English
Pages (from-to)	2321-2326
Number of pages	6
Journal	International Journal of Modern Physics B
Volume	19
Issue number	15-17
DOIs	https://doi.org/10.1142/S0217979205030918
Publication status	Published - 10 Jul 2005

Keywords

FTIR
Gold catalysts
Nanoparticles
UV-visible spectroscopy
Zeolites

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Statistical and Nonlinear Physics
Mathematical Physics

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AU - Pestryakov, A.

AU - Tuzovskaya, I.

AU - Smolentseva, E.

AU - Bogdanchikova, N.

AU - Jentoft, F. C.

AU - Knop-Gericke, A.

PY - 2005/7/10

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AB - The formation of gold nanoparticles in mordenites has been studied by the methods of FTIR spectroscopy of adsorbed CO and diffuse reflectance UV-visible spectroscopy. Different states of ionic and metallic gold were detected in the zeolite cavities and on the external surface of the zeolite - Au+ and Au3+ ions, charged clusters Aunδ+, and neutral nanoparticles Aum. The relative amount of these states depends on the method of sample preparation, type of redox treatment and the SiO2/Al2O3 molar ratio.

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KW - Gold catalysts

KW - Nanoparticles

KW - UV-visible spectroscopy

KW - Zeolites

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