SnO₂ Films Decorated by Au Clusters and their Gas Sensing Properties

Abstract:

It is shown that successive ionic layer deposition (SILD) method can be used for a surface functionalizing of the SnO₂ films and improving their gas sensing properties. It was found that gold clusters deposited on the SnO₂ surface were active to both reducing and oxidizing gases. However, the most significant increase in the conductivity response was observed during detection of ozone. It was established that the effect of the SnO₂ surface decoration by AuNPs on gas sensing characteristics depends on the number of deposition cycles, i.e. the size of gold clusters. Moreover, there is an optimal level of surface doping, and it corresponds to a very small degree of the surface coverage by gold. Models showing the promotional role of Au additives were then discussed, and the mechanism of sensitization in the SnO₂:Au-based gas sensor are proposed.

• Periodical: Materials Science Forum (Volume 827)
• Pages: 251-256
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.827.251
• Online since: August 2015
• Authors: Ghenadii Korotcenkov*, Vladimir Brinzari, S.H. Han, L.B. Gulina, V.P. Tolstoy, B.K. Cho
• Keywords: Characterization, Films, Au, Gas Sensors, Optimization, SILD, SnO₂, Surface Modification

References

[1] D.Y. Cha, G. Parravano, Surface reactivity of supported gold. I. Oxygen transfer between carbon monoxide and carbon dioxide, J. Catal. 18 (1970) 200-211.

[2] M. Haruta, N. Yamada. T. Kobayashi, S. Iijima, Gold catalysts prepared by coprecipitation for low-temperature oxidation of hydrogen and of carbon monoxide, J. Catal. 115 (1989) 301-309.

DOI: 10.1002/chin.198920020

[3] H. Sakurai, M. Haruta, Synergism in methanol synthesis from carbon dioxide over gold catalysts supported on metal oxides, Catal. Today 29 (1996) 361-365.

DOI: 10.1016/0920-5861(95)00305-3

[4] Special issue of Gold: Chemistry, Materials and Catalysis, Chem. Soc. Rev. 37 (2008) 1745- 2140.

[5] R. Wilso, The use of gold nanoparticles in diagnostics and detection, Chem. Soc. Rev. 37 (2008) 2028–(2045).

[6] K. Saha, S.S. Agasti, C. Kim, X. Li, V.M. Rotello, Gold nanoparticles in chemical and biological sensing, Chem. Rev. 112 (2012) 2739-2779.

DOI: 10.1021/cr2001178

[7] V. Krivetskiy, A. Ponzoni, E. Comini, S. Badalyan, M. Rumyantseva, A. Gaskov, Selectivity modification of SnO2-based materials for gas sensor arrays, Electroanal. 22(23) (2010) 2809– 2816.

DOI: 10.1002/elan.201000277

[8] C.N. Satterfield, Heterogeneous Catalysis in Industrial Practice, 2nd edn., Krieger Publishing, Melbourne, FL, (1996).

[9] V.P. Tolstoy, Successive ionic layer deposition. The use in nanotechnology, Rus. Chem. Rev. 75(2) (2006) 161-175.

DOI: 10.1070/rc2006v075n02abeh001197

[10] G. Korotcenkov, V. Tolstoy, J. Schwank, Successive ionic layer deposition (SILD) as a new sensor technology: synthesis and modification of metal oxides, Meas. Sci. Techn. 17 (2006) 1861-1869.

DOI: 10.1088/0957-0233/17/7/026

[11] G. Korotcenkov, V. Brinzari, J. Schwank, A. Cerneavschi, Possibilities of aerosol technology for deposition of SnO2-based films with improved gas sensing characteristics, Mater. Sci. Eng. C 19 (2001) 73-77.

DOI: 10.1016/s0928-4931(01)00445-3

[12] G. Korotcenkov, B.K. Cho, V. Brinzari, Spray pyrolysis of metal oxides SnO2 and In2O3 as an example of thin film technology: Advantages and limitations for application in conductometric gas sensors, Adv. Mater. Res. 748 (2013) 22-27.

DOI: 10.4028/www.scientific.net/amr.748.22

[13] G. Korotcenkov, L.B. Gulina, B.K. Cho, V. Brinzari, V.P. Tolstoy, Au nanoclusters on the surface of SnO2 and In2O3 films: Synthesis by SILD method and characterization, Pure Appl. Chem. 86(5) (2014) 801-817.

DOI: 10.1515/pac-2013-1102

[14] G. Korotcenkov, B.K. Cho, Ozone measuring: What can limit the application of SnO2-based gas sensors? Sens. Actuators B 161 (2012) 28-44.

DOI: 10.1016/j.snb.2011.12.003