Low Temperature Gas Sensing Coatings Made Through Wet Chemical Deposition of Niobium Doped Titanium Oxide Colloid
Naji Al Dahoudi
DOI: 10.4236/msa.2011.24034   PDF    HTML     4,661 Downloads   9,349 Views   Citations


Niobium doped titanium oxide (TiO2) colloid was synthesized to fabricate a hydrogen gas sensor layer on oxidized silicon wafer substrate. The layers were obtained using spin coating technique and then heated in air at 500°C for 30 min. The doping of TiO2 led to a significant enhancement of the sensitivity of the layer especially at low operating temperature. The effect of doping was found effective of operating the sensor at relatively low temperature (150°C). The layers show a very smooth nanostructure with average roughness of less than 0.5 nm. The behavior of the sensing characteristics of such layers was discussed related to their chemical compositions, morphology and their crystalline structure. The morphological and structural characteristics of the layers were studied through X-ray diffraction (XRD) and Atomic force microscopy (AFM).

Share and Cite:

N. Dahoudi, "Low Temperature Gas Sensing Coatings Made Through Wet Chemical Deposition of Niobium Doped Titanium Oxide Colloid," Materials Sciences and Applications, Vol. 2 No. 4, 2011, pp. 265-269. doi: 10.4236/msa.2011.24034.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] H. Ogawa, M. Nishikawa and A. Abe, “Hall Measurement Studies and an Electrical Conduction Model of Tin oxide Ultrafine Particle Films,” Journal of Applied Physics, Vol. 53, No. 6, 1982, pp. 4448-4455. doi:10.1063/1.331230
[2] H. Cheong and M. Lee, “Sensing Characteristics and Surface Reaction Mechanism of Alcohol Sensors Based on Doped SnO2,” Journal of Ceramic Processing Research, Vol. 7, No. 3, 2006, pp. 183-191.
[3] C. H. Kwon, H. Hong, D. H. Yun, S. Kim, Y. Roh and H. Lee, “Thick-Film Zinc-Oxide Gas Sensor for the Control of Lean Air-to-Fuel Ratio in Domestic Combustion Systems,” Sensors and Actuators B: Chemical, Vol. 25, No. 1, 1995, pp. 610-613. doi:10.1016/0925-4005(95)85134-8
[4] S. Shukla, S. Seal, L. Ludwig and C. Parish, “Nanocrystalline Indium Oxide-Doped Tin Oxide Thin Film as Low Temperature Hydrogen Sensor,” Sensors and Actuators B: Chemical, Vol. 97, No. 2-3, 2004, pp. 256-265. doi:10.1016/j.snb.2003.08.025
[5] M. C. Corotta, M. Ferroni, D. Gnani, M. Merli, G. Martinelli, M. C. Casale and M. Notaro,” Pure and Nb-Doped TiO2 as Thick Film Gas Sensors for Environmental Monitoring,” Sensors and Actuators B: Chemical, Vol. 58, No. 1-3, 1999, pp. 310-317. doi:10.1016/S0925-4005(99)00148-3
[6] H. Schmidt, M. Akarsu, T. S. Müller, K. Moh, G. Sch?fer, D. J. Strauss and M. Naumann, “The Formation of Gradients in Wet Deposited Coatings with Photocatalytically Active Nanoparticles,” Research on Chemical Intermediates, Vol. 31, No. 4-6, 2005, pp. 535-553. doi:10.1163/1568567053956680
[7] O. Legrini, E. Oliveros and A. M. Braun, “Photochemical Processes for Water Treatment,” Chemical Reviews, Vol. 93, No. 2, 1993, pp. 671-698. doi:10.1021/cr00018a003
[8] R. Kishore, S. N. Singh and B. Das, “Screen Printed Titanium Oxide and PECVD Silicon Nitride as Antireflection Coating on Silicon Solar Cells,” Renewable Energy, Vol. 12, No. 2, 1997, pp. 131-135. doi:10.1016/S0960-1481(97)00030-X
[9] M. Ponce, R. Parra, R. Savu, E. Joanni, P. Bueno, M. Cilense, J. Varela and M. Castro, “Impedance Spectroscopy Analysis of TiO2 Thin Film Gas Sensors Obtained from Water-Based Anatase Colloids,” Sensors and Actuators B, Vol. 139, No. 2, 2009, pp. 447-452. doi:10.1016/j.snb.2009.03.066
[10] Varghese, D. Gong, M. Paulose, K. Ong and C. Grimes, “Hydrogen Sensing Using Titania Nanotubes,” Sensors and Actuators B: Chemical, Vol. 93, No. 1-3, 2003, pp. 338-344. doi:10.1016/S0925-4005(03)00222-3
[11] L. S. Hsu, R. Rujkorakarn, J. R. Sites, and C. Y. She, “Thermally Induced Crystallization of Amorphous-Titania Film”, Journal of Applied Physics, Vol. 59, No. 10, 1986, pp. 3475-3480. doi:10.1063/1.336817
[12] I. Song, “Defect Structure and DC Electrical Conductivity of Titanium Dioxide-Niobium Dioxide Solid Solution”, Ph.D. Thesis, Case Western Reserve University, Cleveland, 1990.
[13] M. Lee, C. Shih, S. Fang, H. Tu and C. Ho, “Preparation of Niobium-Doped Titanium Oxide Film by Liquid Phase Deposition,” Japanese Journal of Applied Physics, Vol. 46, No. 4A, 2007, pp. 1653-1655. doi:10.1143/JJAP.46.1653

Copyright © 2024 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.