Synthetic insertion of gold nanoparticles into mesoporous silica

Z. Kónya, Victor F. Puntes, I. Kiricsi, Ji Zhu, Joel W. Ager, Moon Kyu Ko, Heinz Frei, Paul Alivisatos, Gabor A. Somorjai

Research output: Contribution to journalArticle

162 Citations (Scopus)

Abstract

Industrial catalysts often consist of transition metals supported on microporous or mesoporous high surface area oxides and are prepared by techniques such as impregnation and ion adsorption. In standard fabrication processes the metal particle size is not well-controlled. In this paper we report a new synthetic route for the production of catalyst materials with more precise control of the metal particle size. Gold nanoparticles encapsulated in mesoporous silica (MCM-41 and MCM-48) served as a model system, although the techniques described are applicable to a wide variety of metals and oxide supports. The samples were characterized by a combination of low-angle powder X-ray diffraction, transmission electron microscopy, N2 porosimetry, infrared spectroscopy, and X-ray absorption near-edge spectroscopy. The results show that the MCM-41 and MCM-48 structures retain their long-range order when metal particles are added; in addition, the size of the channels increases monotonically with metal loading. X-ray absorption near-edge spectroscopy in combination with the adsorption of thiols provides conclusive evidence that 2- and 5-nm-diameter Au nanoparticles are incorporated into the pores of the silicates and that they are accessible to reactant molecules.

Original languageEnglish
Pages (from-to)1242-1248
Number of pages7
JournalChemistry of Materials
Volume15
Issue number6
DOIs
Publication statusPublished - Mar 25 2003

Fingerprint

Silicon Dioxide
Gold
Multicarrier modulation
Metals
Silica
Nanoparticles
X ray absorption
Oxides
Particle size
Spectroscopy
Adsorption
Silicates
Catalysts
Sulfhydryl Compounds
Impregnation
X ray powder diffraction
Transition metals
Infrared spectroscopy
Ions
Transmission electron microscopy

ASJC Scopus subject areas

  • Materials Science(all)
  • Materials Chemistry

Cite this

Kónya, Z., Puntes, V. F., Kiricsi, I., Zhu, J., Ager, J. W., Ko, M. K., ... Somorjai, G. A. (2003). Synthetic insertion of gold nanoparticles into mesoporous silica. Chemistry of Materials, 15(6), 1242-1248. https://doi.org/10.1021/cm020824a

Synthetic insertion of gold nanoparticles into mesoporous silica. / Kónya, Z.; Puntes, Victor F.; Kiricsi, I.; Zhu, Ji; Ager, Joel W.; Ko, Moon Kyu; Frei, Heinz; Alivisatos, Paul; Somorjai, Gabor A.

In: Chemistry of Materials, Vol. 15, No. 6, 25.03.2003, p. 1242-1248.

Research output: Contribution to journalArticle

Kónya, Z, Puntes, VF, Kiricsi, I, Zhu, J, Ager, JW, Ko, MK, Frei, H, Alivisatos, P & Somorjai, GA 2003, 'Synthetic insertion of gold nanoparticles into mesoporous silica', Chemistry of Materials, vol. 15, no. 6, pp. 1242-1248. https://doi.org/10.1021/cm020824a
Kónya, Z. ; Puntes, Victor F. ; Kiricsi, I. ; Zhu, Ji ; Ager, Joel W. ; Ko, Moon Kyu ; Frei, Heinz ; Alivisatos, Paul ; Somorjai, Gabor A. / Synthetic insertion of gold nanoparticles into mesoporous silica. In: Chemistry of Materials. 2003 ; Vol. 15, No. 6. pp. 1242-1248.
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