One-pot synthesis of mesostructured Ag/silica composite films

Abstract

Mesoporous silica films embedded with Ag nanoparticles were directly synthesized by a solgel dip-coating process, combining alkyl (ethylene oxide) surfactant as temple and tetraethoxysilane as inorganic precursor. The addition of Ag⁺ ion to the reaction sol was prior to the formation of films, followed by the heat treatment at 150 °C led to the creation of Ag nanoparticies. The formation of Ag nanoparticles and the change of its surface plasma resonance absorption were characterized by Uv-vis. The small angle XRD test indicated that the films had an ordered hexagonal mesoporous structure, of which the unit cell parameter was about 4.26 nm. The TEM images and EDS spectra of the samples have directly verified the presence of mono-dispersed Ag nanoparticles within the films, due to the confine effects of mesopores.

Keywords

mesoporous films / Ag nanoparticles / surface plasma resonance / composite film

References

[1] Meng Q., Fu L., Lin J., . Preparation and Characterization of a Layered Transparent Luminescent Thin Film of Silica-CTAB-Tb(acac)₃ Composite with Mesostructure[J]. Journal of Physics and Chemistry of Solids, 2003, 64: 63-67.

[2] Pevzner S., Regev U. O., Yerushalmi-Rozen R. Thin Films of Mesoporous Silica: Preparation and Characterization[J]. Current Opinion in Colloid & Interface Science, 2000, 4: 420-427.

[3] Fukuoka A., Araki H., Sakamoto Y., . Template Synthesis of Nanoparticle Arrays of Gold and Platinum in Mesoporous Silica Films[J]. Nano Lett., 2002, 2(7): 793-795.

[4] Wang X., Yu J. C., Ho C., . A Robust Three-Dimensional Mesoporous Ag/TiO₂ Nanohybrid Film[J]. Chem. Commun., 2005, 17: 2262-2264.

[5] Hu J., Cai W., Li Y., . Oxygen-induced Enhancement of Surface Plasmon Resonance of Silver Nanoparticles for Silver-coated Soda-lime Glass[J]. J. Phys. B: Condens. Matter., 2005, 17: 5349-5354.

[6] Plyuto Y., Berquier J. M., Jacquiod C., . Ag Nanoparticles Synthesized in Template-structured Mesoporous Silica Films on a Glass Substrate[J]. Chem. Commun., 1999, 17: 1653-1654.

[7] Besson S., Gacoin T., Ricolleau C., . Silver Nanoparticles Growth in 3D-hexagonal Mesoporous Silica Films[J]. Chem. Commun., 2003, 3: 360-361.

[8] Brinker C. J., Lu Y., Sellinger A., . Evaporation-Induced Self-Assembly: Nanostructures Made Easy[J]. Adv. Mater., 1999, 11(7): 579-585.

[9] Kreibig U., Vollmer M. Optical Properties of Metal Clusters[OL], 1995. Berlin: Springer.

[10] Xu S., Xu Q., Tian Y., . The Series Books of Inorganic Chemistry-volume Six[M], 1995. Beijing: Science Press. 574

[11] Lu Y., Ganguli R., Drewien C., . Continuous Formation of Supported Cubic and Hexagonal Mesoporous Films by Sol-gel Dip-coating[J]. Nature, 1997, 389: 364-368.

[12] Marler B., Oberhagemann U., Vortmann S., . Influence of the Sorbate Type on the XRD Peak Intensities of Loaded MCM-41[J]. Microporous Mater., 1996, 6(5–6): 375-383.

[13] Lim M. H., Stein A. Comparative Studies of Grafting and Direct Syntheses of Inorganic-Organic Hybrid Mesoporous Materials[J]. Chem. Mater., 1999, 11(11): 3285-3295.

[14] Zhang W., Glomski B., Pauly T.R., . A New Nonionic Surfactant Pathway to Mesoporous Molecular Sieve Silicas with Long Range Framework Order[J]. Chem. Commun., 1999, 18: 1803-1804.

[15] Zhu W., Han Y., An L. Silver Nanoparticles Synthesized from Mesoporous Ag/SBA-15 Composites[J]. Microporous and Mesoporous Materials, 2005, 80(1–3): 221-226.