Study of the Properties of Al₂O₃-Ag Nanopowders Produced by an Innovative Thermal Decomposition–Reduction and Silver Nitrate Reduction Methods

Abstract:

The present study is concerned with the morphology, physical properties and biocidal activity of Al2O3-Ag nanopowders produced by two methods: thermal decomposition-reduction and the silver nitrate reduction. The innovative method of thermal decomposition-reduction has been described in our earlier publication and is protected by our patent application, whereas the silver nitrate reduction method is commonly used in industry at the present. The nano-powders produced by these two methods differ considerably from one another in terms of their morphology and physical properties. The proposed method of thermal decomposition-reduction gives Al2O3-Ag nano-powders which are not only much less agglomerated with the average agglomerate sizes below 1 µm, but also the average size of their particles is considerably smaller (below 60 nm). Moreover, their specific surface is larger (above 200 m2g-1) and they have good bactericidal and fungicidal properties.

• Periodical: Key Engineering Materials (Volume 478)
• Pages: 13-18
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.478.13
• Online since: April 2011
• Authors: Agnieszka Maria Jastrzębska, Antoni Ryszard Kunicki, Andrzej Roman Olszyna
• Keywords: Alumina, Biocidal, Nanosilver, Reduction, Silver Nitrate, Thermal Decomposition-Reduction

References

[1] S. Pal, Y.K. Tak, J.M. Song: Appl. Environ. Microbiol. Vol. 73 (2007), p.1712.

[2] M.J. Pike-Biegunski: Lek w Polsce (Drug in Poland) Vol. 11 (2005), p.98.

[3] M.J. Pike-Biegunski: Lek w Polsce (Drug in Poland) Vol. 9 (2005), p.30.

[4] J.J. Buckeley, P.L. Gai, A.F. Lee, L. Olivid, K. Wilson: Chem. Commun. (2008), p.4013.

[5] V.A. Dubok: Powder Metallurgy and Metal Ceramics Vol. 39 (2000), p.381.

[6] E. Weir, A. Lawlor, A. Whelan, F. Regan: Analyst Vol. 133 (2008), p.835.

[7] G. Wang, C. Shi, N. Zhao, X. Du: Mat. Letters Vol. 61 (2007), p.3795.

[8] A. Esteban-Cubillo, C. Diaz, A. Fernàndez, L.A. Diaz, C. Percharromàn, R. Torrecillas, J.S. Moya: J. Europ. Ceram. Soc. Vol. 26 (2006), p.1.

[9] A. Kunicki, A. Olszyna, A. Sołgała, PL Patent Application P-386489 (2008).

[10] A. Sołgała, A. Kunicki. A. Olszyna: Materiały Ceramiczne (Ceramic Materials) Vol. 60 (2008), p.262.

[11] A. Jastrzębska, A. Kunicki, A. Olszyna, Kompozyty (Composites) Vol. 10 (2010), p.270.

[12] A. Jastrzębska, A. Olszyna, A. Kunicki: Mat. Sci. and Engineering Vol. 3 (2010), p.514.

[13] K.J. Kurzydłowski, B. Ralph, in: The quantitative description of the microstructure of the materials, CRC Press LLC (1995).

[14] T. Thiel in: Streaking microbial cultures on agar plates. Science in the Real World: Microbes in Action (1999).