Copper and nickel doping effect on interaction of SnO₂ films with H₂S

Abstract

The pyrosol spraying deposition technique has been used for the synthesis of SnO₂ , SnO₂–CuO and SnO₂–NiO polycrystalline films with grain size of 3–10 nm. The composition, microstructure and electrical properties of the films have been investigated by X-ray diffraction, electron probe microanalysis, Auger electron spectroscopy and X-ray photoelectron spectroscopy. The interaction of SnO₂ , SnO₂–CuO and SnO₂–NiO polycrystalline films with the reducing gases: H₂S, C₂H₅OH, CO and CH₄ has been investigated by conductance measurements. It has been found that copper and nickel have a significant effect on the sensitivity of SnO₂ films to H₂S. The model of interaction of SnO₂ films with H₂S gas and different sensor properties of tin dioxide films doped with copper and nickel are discussed with regard to the position of these metals in the films.

References

1. G. Sberveglieri, S. Groppelli, P. Nelli, C. Perego, G. Valdre and A. Camanzi, Sens. Actuators B, 1993, 15–16, 86.
2. V. Lantto, P. Romppainen, T. S. Rantala and S. Leppavuori, Sens. Actuators B, 1991, 4, 451.
3. K. Takahata, in Chemical Sensor Technology, ed. T. SeiyamaKodanska, Tokyo, Elsevier, Amsterdam, 1988, vol. 1, p.39.
4. T. Maekawa, J. Tamaki, N. Miura and N. Yamazoe, Chem. Lett., 1991, 4, 575.
5. J. Tamaki, T. Maekawa, N. Miura and N. Yamazoe, Sens. Actuators B, 1992, 9, 197.
6. S. Manorama, G. Sarala Devi and V. J. Rao, Appl. Phys. Lett., 1994, 64, 3163.
7. M. N. Rumyantseva, M. Labeau, J. P. Senateur, G. Delabouglise, M. N. Boulova and A. M. Gaskov, Mater. Sci. Eng. B, 1996, 41, 228.
8. W. R. Smith and R. L. Missen, Chemical Reaction Equilibrium Analysis: Theory and Algorithms, John Wiley and Sons, New York, 1982, p. 364.
9. M. N. Rumyantseva, A. M. Gaskov, L. I. Ryabova, J. P. Senateur, B. Chenevier and M. Labeau, Mater. Sci. Eng. B, 1996, 41, 333.
10. J. L. Pouchou and F. Pichoir, Rech. Aerosp., 1984, N5, 349.
11. D. E. Ramaker, J. Electron Spectrosc. Relat. Phenom., 1994, 66, 269.
12. J. Muzusaki, H. Koinuma, J. L. Shimoyama, M. Kawasaki and K. Fueki, J. Solid State Chem., 1990, 8, 443.
13. H. Takayasu, Fractals in the Physical Science, Manchester University Press, Manchester and New York, 168 p..
14. J. F. McAleer, P. T. Moseley, J. O. W. Norris, D. E. Williams and B. C. Tofield, J. Chem. Soc., Faraday Trans. 1, 1988, 84, 441.
15. J. N. Zemel, Thin Solid Films, 1988, 163, 189.