Nanocrystalline Na0.1V2O5.nH2O Xerogel Thin Film for Gas Sensing

Authors: M. S. Al-Assiri, M. M. El-Desoky, Ahmed A. Ibrahim, M. Abaker, A. A. Bahgat

Abstract:

Nanocrystalline thin film of Na0.1V2O5.nH2O xerogel obtained by sol gel synthesis was used as gas sensor. Gas sensing properties of different gases such as hydrogen, petroleum and humidity were investigated. Applying XRD and TEM the size of the nanocrystals is found to be 7.5 nm. SEM shows a highly porous structure with submicron meter-sized voids present throughout the sample. FTIR measurement shows different chemical groups identifying the obtained series of gels. The sample was n-type semiconductor according to the thermoelectric power and electrical conductivity. It can be seen that the sensor response curves from 130oC to 150oC show a rapid increase in sensitivity for all types of gas injection, low response values for heating period and the rapid high response values for cooling period. This result may suggest that this material is able to act as gas sensor during the heating and cooling process.

Keywords: Sol gel, Thermoelectric power, XRD, TEM, Gas sensing.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1096557

References:

[1] P.T. Moseley, B.C. Toefield (Eds.), e , Adam Hilger,Bristol, 1987.
[2] Y.T. Lima, J.Y.Sonb,n, J.-S.Rhee, "Vertical ZnOnanorodarray as an effective hydrogen gas sensor," Ceramics International 39 (2013) 887.
[3] S.S. Sunu, E. Prabhu, V. Jayaraman, K.I. Gnanasekar, T.Gnanasekaran, "Gas sensing properties of PLD made MoO3 films," Sensors and Actuators B 94 (2003) 189.
[4] O. Schilling, K. Colbow,"mechanism for sensing reducing gases with vanadium pentoxide films,"Sensors and Actuators A,B 21 (1994) 151.
[5] A.A. Bahgat, F.A. Ibrahim, M.M. El-Desoky, "Nanocrystalline Vanadium PentoxideXerogelProperties,and Hydrogen Sensing," AIP Conf. Proc. 1370, 61-67 (2011); doi: 10.1063/1.3638083
[6] K. Lai, A. Kong, F.Yang, B. Chen, H. Ding, Y.Shan, S.Huang, "Intercalation of alkylviologendications into thelayered vanadium pentoxide,"Inorganica ChimicaActa359 (2006) 1050.
[7] J. Muster, G.T. Kim, J.G. Park, Y.W. Park, S. Roth, M. Burghard, "Electrical Transport Through Individual Vanadium Pentoxide," Nanowires Adv. Mater. 12 (2000) 420.
[8] A.Z. Sadek, J.G. Partridge, D.G. McCulloch, Y.X. Li, X.F.Yu , W. Wlodarskia, K. Kalantar-zadeh, "Nanoporous TiO2 thin film based conductometric H2 sensor," Thin SolidFilms 518 (2009) 1294.
[9] W. Jin, B. Dong, W. Chen, C. Zhao, L. Mai, Y.Dai,"Synthesis and gas sensing properties of Fe2O3nanoparticles activated V2O5 nanotubes," Sensors and Actuators B 145 (2010) 211
[10] N.F. Mott, "Conduction in glasses containing transition metal ions," J. Non - Cryst. Solids 1 (1968)1-17.
[11] I.G. Austin, N.F. Mott, "Polarons in crystalline and non-crystalline materials,"Adv. Phys. 18 (1969)41-102.
[12] M.S. Al-Assiri, M.M. El-Desoky, A. Alyamani, A. Al-Hajry, A. Al- Mogeeth, A.A. Bahgat, "Structural andtransport properties of Li- intercalated vanadiumpentoxide nanocrystalline films," Phil. Mag.25(2010)3421-3439.
[13] A.A. Bahgat , H.A. Mady, S.S. Abdel moghny, A. S. Abd-Rabo, S. E. Negm, "Transport Properties of KxV2O5·nH2ONanocrystalline Films,"J.Mater. Sci. Technol. 27(2011)865-872.
[14] Hoda A. Mady, S.E. Negm, A.S. Abdel Moghny, A.S.Abd-Rabo, A. A. Bahgat, "Study of optical properties ofhighly oriented nanocrystalline V2O5·nH2O films dopedwith K ions," J Sol-Gel SciTechnol 62(2012)18.
[15] H. Liu, Y. P. Wu, E. Rahm, R. Holzem, H. Q. Wu, "Cathode materials for lithium ion batteries prepared by sol-gelmethods," J. Solid State Eletrochem, DOI 10.1007/s10008-004-0521-1.
[16] M.S. Al-Assiri, M.M. El-Desoky, A. Alyamani, A. Al-Hajry, A. Al- Mogeeth, A.A. Bahgat, "Spectroscopic studyof nanocrystalline V2O5.nH2O films doped with Li ions,"Optics & Laser Technology 42 (2010) 994.
[17] A. A. Bahgat, F. A. Ibrahim, M. M. El-Desoky, "Electrical and optical properties of highly oriented nanocrystallinevanadium pentoxide," Thin Solid Films, 489 (2005) 68-73.
[18] D. Lou , N. Audebrand, Advances in x-ray analysis, 41(1997) 556.
[19] M. M. El-Desoky, F. A. Ibrahim, "Synthesis, structural and transport properties of Li-doped molybdenum andvanadium oxide nanocrystalline films," J. Sol-Gel Sci.Technol., DOI 10.1007/s10971-011-2537-1.
[20] B. A. Marinkovic, P. M. Jardim, A. Saavedra, L. Y. Lau, C. Baehtz, R. R. de Avillez, F. Rizzo, "Negative thermal expansion in hydrated HZSM-5 orthorhombic zeolite,Microporous,"Mesoporous Mater.71 (2004) 117.
[21] A.A. Bahgat, A. Al-Hajry, M.M. El-Desoky, "Giant extrinsic negative thermal expansion in vanadiumpentoxidenanocrystalline films," Phys. Status solidi (a), 203 (2006)1999.
[22] R..R. Heikes and R.W. Ure (Eds.), Thermoelectricity, Interscience, New York, 1961.
[23] S. Benkara, S. Zerkout, H.Ghamri, "Synthesis of Sn doped ZnO/TiO2 nanocomposite film and their application to H2 gas sensing properties," Mater. Sci. Semi.Processing 16(2013) 1271.
[24] Y. Qin, G. Fan, K. Liu, M. Hu, "Vanadium pentoxide hierarchical structure networks for high performance ethanol gas sensor with dual working temperature characteristic," Sensors and Actuators B 190 (2014) 141.
[25] R. S. Gaikwad, G. R. Patil, B.N. Pawar, R.S. Maneb, S. Han, "Liquefied petroleum gas sensing properties of sprayed nanocrystalline zinc oxide thin films," Sensors and Actuators A 189 (2013) 339.