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Low Temperature Ethanol Gas Sensor based on SnO2/MWNTs Nanocomposite

Authors: O. Alizadeh Sahraei, A. Khodadadi, Y. Mortazavi, M. Vesali Naseh, S. Mosadegh

Abstract:

A composite made of plasma functionalized multiwall carbon nanotubes (MWNTs) coated with SnO2 was synthesized by sonochemical precipitation method. Thick layer of this nanocomposite material was used as ethanol sensor at low temperatures. The composite sensitivity for ethanol has increased by a factor of 2 at room temperature and by a factor of 13 at 250°C in comparison to that of pure SnO2. SEM image of nanocomposite material showed MWNTs were embedded in SnO2 matrix and also a higher surface area was observed in the presence of functionalized MWNTs. Greatly improved sensitivity of the composite material to ethanol can be attributed to new gas accessing passes through MWNTs and higher specific surface area.

Keywords: Carbon nanotube, Functionalized, Gas sensor, Low temperature, Nanocomposite, Tin oxide.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1057303

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References:


[1] J.F. McAleer, P.T. Moseley, J.O.W. Norris, D.E. Williams, P. Taylor, B.C. Tofield, "Tin oxide based gas sensors", Materials chemistry and physics, vol. 17, pp. 577-583,1987.
[2] E. Comini, "Metal oxide nano-crystals for gas sensing", Analytica Chimica Acta, vol. 568, pp. 28-40, 2006.
[3] R.M.Walton, D.J. Dwyer, J.W. Schwank, "Gas sensing based on surface oxidation/reduction of platinum -titania thin films II. The role of chemisorbed oxygen in film sensitization Applied surface science", vol. 125, pp. 199-207, 1998.
[4] M.I. Baraton, L. Merhari, "Surface property control of semiconducting metal oxide nanoparticles", Nanostructured Materials, vol. 10, pp. 699- 713, 1998.
[5] P. Ivanoc, E. Llobet, X.Vilanova, J. Brezmes, J. Hubalek, X. Corrig, "Development of high sensitivity ethanol gas sensors based on Pt-doped SnO2 surfaces", Sensors and Actuators B, vol. 99, pp. 201-206, 2004.
[6] R.S. Niranjan, V.A. Chaudhary, I.S. Mulla, "A novel hydrogen sulfide room temperature sensor based on copper nanocluster functionalized tin oxide thin films", Sensors and Actuators B, vol. 85, pp. 26-32, 2002.
[7] E. Comini, G. Faglia, G. Sberveglieri, "UV light activation of tin oxide thin films for NO2 sensing at low temperatures", Sensors and Actuators B, vol. 78, pp. 73-77, 2001.
[8] R.S. Niranjan,Y.K.Hwang, D.-K. Kim, S.H. Jhung, J.-S. Chang, I.S. Mulla, "Nanostructured tin oxide: Synthesis and gas-sensing properties", Materials chemistry and physics, vol. 92, pp. 384-388, 2005.
[9] P.M. Ajayan, S. Iijima, "Capillarity-induced filling of carbon nanotubes", Nature, vol. 361, pp. 333-334, 1993.
[10] C.H. Kiang, J.S. Choi, T.T. Tran, A.D. Bacher, "Molecular Nanowires of 1 nm Diameter from Capillary Filling of Single-Walled Carbon Nanotubes", Journal of Physical Chemistry B, vol. 103, pp. 7449- 7451,1999.
[11] S.C. Tsang, Y.K. Chen, P.J.F. Harris, M.L.H Green, "A simple chemical method of opening and filling carbon nanotubes", Nature, vol. 372, pp. 159-162, 1994.
[12] P.M. Ajayan, O. Stephan, P. Redlich, C. Colliex, "Carbon nanotubes as removable templates for metal oxide nanocomposites and nanostructures" Nature, vol. 375, pp. 564-567, 1995.
[13] C. Xu, J. Sloan, G. Brown, S. Bailey, V.C. Williams, S. Friedrichs, K.S. Coleman, E. Flahaut, J.L. Hutchison, R.E. Dunin-Borkowski, M.L.H.Green, Chemical Communications, vol. 24, pp. 2427-2428, 2000.
[14] Y. Zhang, N.W. Franklin, R.J. Chen, H.J. Dai, "Metal coating on suspended carbon nanotubes and its implication to metal-tube interaction", Chemical Physics Letter, vol. 331, pp. 35-41, 2000.
[15] H. Kim, W. Sigmund, "Zinc oxide nanowires on carbon nanotubes", Applied Physics Letter, vol. 81, pp. 2085-2087, 2002.
[16] W.Q. Han, A. Zettl, "Coating Single-Walled Carbon Nanotubes with Tin Oxide", Nano Letter, vol. 3, pp.681-683, 2003.
[17] Y. Chen, C. Zhu, T. Wang, "The enhanced ethanol sensing properties of multi-walled carbon nanotubes/SnO2 core/shell nanostructures" Nanotechnology, vol. 17, pp. 3012-3017, 2006.
[18] Y. Liu, H. Yang, Y. Yang, Z. Liu, G. Shen, R. Yu , "Gas sensing properties of tin dioxide coated onto multi-walled carbon nanotubes", Thin Solid Films, vol. 497, pp. 355-360, 2006.
[19] Y. X. Liang, Y. J. Chen, T. H. Wang, "Low-resistance gas sensors fabricated from multiwalled carbon nanotubes coated with a thin tin oxide layer", Applied Physics Letter, vol. 85, pp. 666-668, 2004.
[20] B.C. Satishkumar, E.M. Vogl, A. Govindaraj, C.N.R. Rao, "The decoration of carbon nanotubes by metal nanoparticles", Journal of physics D: Applied physics, vol. 29, pp. 3173-3176, 1996.
[21] J. Xie, V. K. Varadan, "Synthesis and characterization of high surface area tin oxide/functionalized carbon nanotubes composite as anode materials Materials", Chemistry and Physics, vol. 91, pp. 274-280, 2005.
[22] R. Ionescu, E.H. Espinosa, E. Sotter, E. Llobet, X. Vilanova, X. Correig,A. Felten, C. Bittencourt, G. Van Lier, J.-C. Charlier, J.J. Pireaux, "Oxygen functionalisation of MWNT and their use as gas sensitive thick-film layers", Sensors and Actuators B, vol. 113, pp. 36- 46, 2006.
[23] J. Gong, J. Sun, Q. Chen, "Micromachined sol-gel carbon nanotube/SnO2 nanocomposite hydrogen sensor", Sensors and Actuators B, vol. 130, pp. 829-835, 2008.
[24] B. Wei, M. Hsu, P. Su, H. Lin, R. Wu, H. Lai, "A novel SnO2 gas sensor doped with carbon nanotubes operating at room temperature", Sensors and Actuators B, vol. 101, pp. 81-89,2004.