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Microstructural Analysis of Au/TiO2-SBA-15 Nanocomposite

Published online by Cambridge University Press:  01 May 2014

Takashi Gondo ,
Kenji Kaneko ,
Takeshi Nishiyama ,
Kazuhiro Yamada ,
Zineb Saghi ,
Jonathan S. Barnard  and
Paul A. Midgley
Takashi Gondo*
Affiliation:
Department of Material Science and Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
Kenji Kaneko
Affiliation:
Department of Material Science and Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
Takeshi Nishiyama
Affiliation:
Department of Material Science and Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
Kazuhiro Yamada
Affiliation:
Department of Material Science and Engineering, Kyushu University, 744 Motooka, Nishiku, Fukuoka 819-0395, Japan
Zineb Saghi
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
Jonathan S. Barnard
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
Paul A. Midgley
Affiliation:
Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, CB3 0FS, UK
*
*Corresponding author. [email protected]
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Abstract

Properties of gold nanoparticles (AuNPs) are very different from bulk gold, in particular, highly dispersed AuNPs exhibit high catalytic activities on metal oxide supports. Catalytic activities of AuNPs are strongly dependent on: (i) size and morphology; (ii) synthesis methods; (iii) nature of the support; (iv) interaction between AuNPs and the support; and (v) oxidation state of AuNPs in the synthesized catalysts. A goal is to maintain the size and to prohibit aggregation of AuNPs, since aggregations deteriorate catalytic activities. Some strong interactions are therefore required between AuNPs and their supports to prevent the movement of AuNPs. SBA-15 is a promising material for the support of AuNPs since it has ordered two-dimensional hexagonal pore channels, uniform pore size ranging from 5 to 30 nm, narrow pore size distribution, thick amorphous walls ranging from 3 to 6 nm, and high surface area. In this study, SBA-15, TiO2-SBA-15 and TiO2-SBA-15-AuNP nanocomposites were synthesized by the sol-gel method and microstructural characterizations were carried out by both X-ray diffraction analysis and electron microscopy.

Keywords

mesoporous silicaSBA-15AuNPsTiO23D-ETHAADF-STEMHREM
Type
FEMMS Special Issue
Information
Microscopy and Microanalysis , Volume 20 , Issue 4 , August 2014 , pp. 1001 - 1007
Copyright
© Microscopy Society of America 2014 

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References

Abad, A., Concepción, P., Corma, A. & García, H. (2005). A collaborative effect between gold and a support induces the selective oxidation of alcohols. Amgew Chem Int Edit 44, 4066–4069.Google Scholar
Akita, T., Tanaka, K., Kohyama, M. & Haruta, M. (2008). HAADF-STEM observation of Au nanoparticles on TiO2 . Surf Interface Anal 40, 1760–1763.Google Scholar
Bandyopadhyay, M., Korsak, O., Van den Berg, M.W.E., Grunert, W., Birkner, A., Li, W., Schuth, F. & Gies, H. (2006). Gold nano-particles stabilized in mesoporous MCM-48 as active CO-oxidation catalyst. Micropor Mesopor Mat 89, 158–163.CrossRefGoogle Scholar
Bond, G.C. & Thompson, D.T. (1999). Catalysis by gold. Catal Rev 41, 319–388.CrossRefGoogle Scholar
Budroni, G. & Corma, A. (2006). Gold-organic-inorganic high-surface-area materials as precursors of highly active catalysts. Angew Chem Int Edit 45, 3328 –3331.Google Scholar
Corma, A. & Domine, M.E. (2005). Gold supported on a mesoporous CeO2 matrix as an efficient catalyst in the selective aerobic oxidation of aldehydes in the liquid phase. Chem Commun (32), 4042–4044.Google Scholar
Daniel, M.-C. & Astruc, D. (2004). Gold nanoparticles: Assembly, supramolecular chemistry, quantum-size-related properties, and applications toward biology, catalysis, and nanotechnology. Chem Rev 104, 293–346.Google Scholar
Glomm, W.R., Oye, G., Walmsley, J. & Sjoblom, J. (2005). Synthesis and characterization of gold nanoparticle-functionalized ordered mesoporous materials. J Disper Sci Technol 26, 729–744.Google Scholar
Guari, Y., Thieuleux, C., Mehdi, A., Reye, C., Corriu, R.J.P., Gomez-Gallardo, S., Philippot, K. & Chaudret, B. (2003). In situ formation of gold nanoparticles within thiol functionalized HMS-C16 and SBA-15 type materials via an organometallic two-step approach. Chem Mater 15, 2017–2024.Google Scholar
Haruta, M. (1997). Size- and support-dependency in the catalysis of gold. Catal Today 36, 153–166.Google Scholar
Haruta, M., Tsbota, S., Kobayashi, T., Kageyama, H., Genet, M.J. & Delmon, B. (1993). Low-temperature oxidation of CO over gold supported on TiO2, α-Fe2O3, and Co3O4 . J Catal 144, 175–192.Google Scholar
Horváth, D., Toth, L. & Guczi, L. (2000). Gold nanoparticles: Effect of treatment on structure and catalytic activity of Au/Fe2O3 catalyst prepared by co-precipitation. Catal Lett 67, 117–128.Google Scholar
Hutchings, G.J. (1996). Catalysis: A golden future. Gold Bull 29, 123–130.Google Scholar
Konya, Z., Puntes, V.F., Kiricsi, I., Zhu, J., Ager, J.W., Ko, M.K., Frei, H., Alivisatos, P. & Somorjai, G.A. (2003). Synthetic insertion of gold nanoparticles into mesoporous silica. Chem Mater 15, 1242–1248.Google Scholar
Kresge, C.T., Leonowicz, M.E., Roth, W.J., Vartuli, J.C. & Beck, J.S. (1992). Ordered mesoporous molecular sieves synthesized by a liquid-crystal template mechanism. Nature 359, 710–712.Google Scholar
Kruk, M., Jaroniec, M., Ko, C.H. & Ryoo, R. (2000). Characterization of the porous structure of SBA-15. Chem Mater 12, 1961–1968.Google Scholar
Liao, D.L., Wu, G.S. & Liao, B.Q. (2009). Zeta potential of shape-controlled TiO2 nanoparticles with surfactants. Colloid Surf A 348, 270–275.Google Scholar
Okumura, M., Akita, T. & Haruta, M. (2002). Hydrogenation of 1,3-butadiene and of crotonaldehyde over highly dispersed Au catalysts. Catal Today 74, 265–269.Google Scholar
Okumura, M., Tsubota, S. & Haruta, M. (2003). Preparation of supported gold catalysts by gas-phase grafting of gold acethylacetonate for low-temperature oxidation of CO and of H2 . J Mol Catal A Chem 199, 73–84.Google Scholar
Okumura, M., Tsubota, S., Iwamoto, M. & Haruta, M. (1998). Chemical vapor deposition of gold nanoparticles on MCM-41 and their catalytic activities for the low-temperature oxidation of CO and of H2 . Chem Lett 27, 315–316.CrossRefGoogle Scholar
Parks, G.A. (1965). The isoelectric points of solid oxides, solid hydroxides, and aqueous hydroxo complex systems. Chem Rev 65, 177–198.Google Scholar
Valden, M., Lai, X. & Goodman, D.W. (1998). Onset of catalytic activity of gold clusters on titania with the appearance of nonmetallic properties. Science 281, 1647–1650.Google Scholar
Yan, W.F., Mahurin, S.M., Chen, B., Overbury, S.H. & Dai, S. (2005). Effect of supporting surface layers on catalytic activities of gold nanoparticles in CO oxidation. J Phys Chem B 109, 15489–15496.Google Scholar
Yang, C.M., Liu, P.H., Ho, Y.F., Chiu, C.Y. & Chao, K.J. (2003). Highly dispersed metal nanoparticles in functionalized SBA-15. Chem Mater 15, 275–280.Google Scholar
Zanella, R., Giorgio, S., Shin, C.-H., Henry, C.R. & Louis, C. (2004). Characterization and reactivity in CO oxidation of gold nanoparticles supported on TiO2 prepared by deposition-precipitation with NaOH and urea. J Catal 222, 357–367.Google Scholar
Zhao, D., Feng, J., Huo, Q., Melosh, N., Fredrickson, G.H., Chmelka, B.F. & Stucky, G.D. (1998). Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 Angstrom pores. Science 279, 548–552.Google Scholar
Zhao, D., Sun, J., Li, Q. & Stucky, G.D. (2000). Morphological control of highly ordered mesoporous silica SBA-15. Chem Mater 12, 275–279.Google Scholar
Zhou, J., Ralston, J., Sedev, R. & Beattie, D.A. (2009). Functionalized gold nanoparticles: Synthesis, structure and colloid stability. J Colloid Interface Sci 331, 251–262.Google Scholar
Zhu, J., Konya, Z., Puntes, V.F., Kiricsi, I., Miao, C.X., Ager, J.W., Alivisatos, A.P. & Somorjai, G.A. (2003). Encapsulation of metal (Au, Ag, Pt) nanoparticles into the mesoporous SBA-15 structure. Langmuir 19, 4396–4401.Google Scholar