Preparation and Characterization of Pd-Based Optical Hydrogen Sensor Operated at Room Temperature by Using Photodeposition Process

Abstract:

Palladium (Pd) nanoparticles were prepared on photocatalytic TiO2-coated glass substrate by a photodeposition process and the optical hydrogen sensing properties were examined at room temperature. The TiO2 coatings were prepared on a non-alkaline glass substrate by a sol-gel process and hot water treatment. Pd nanoparticles were deposited on the TiO2 film by photodeposition using UV light. The obtained Pd/TiO2 thin film showed remarkable optical transmittance response to hydrogen gas at room temperature. The normalized transmittance of the Pd/TiO2 thin film at a wavelength of 640 nm decreased to 0.9 on exposing the film to hydrogen gas for only 5 s. This transmittance decrease is considered to be due to a gaschromic effect of the TiO2 photocatalytic coating.

• Periodical: Key Engineering Materials (Volume 445)
• Pages: 100-104
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.445.100
• Online since: July 2010
• Authors: Junichi Hamagami, Ryo Araki, Hiroyuki Oda, Mototsugu Sakai, Atsunori Matsuda
• Keywords: Hot Water Treatment, Optical Hydrogen Sensor, Palladium Nanoparticles, Photodeposition, Sol-Gel (SG), Titania Film

References

[1] C. McDonagh, C.S. Burke and B.D. MacCraith, Chem. Rev. Vol. 108 (2008), p.400.

[2] Y. S. Oh, J. Hamagami, Y. Watanabe and M. Takata: Sens. Actuators B Vol. 13-14 (1993), p.547.

[3] J. Hamagami, Y. S. Oh, Y. Watanabe and M. Takata: Sens. Actuators B Vol. 13-14 (1993), p.281.

[4] Y. S. Oh, J. Hamagami, Y. Watanabe, M. Takata and H. Yanagida: J. Ceram. Soc. Jpn. Vol. 101 (1993), p.618.

[5] B. Kraeuttler and A.J. Bard: J. Am. Chem. Soc. Vol. 100 (1978), p.4317.

[6] A. Matsuda, Y. Kotani, T. Kogure, M. Tatsumisago and T. Minami: J. Am. Ceram. Soc. Vol. 83 (2000), p.229.

[7] A. Matsuda, T. Matoda, K. Tadanaga, T. Minami, M. Tatsumisago and T. Kogure, : J. Am. Ceram. Soc. Vol. 88 (2005), p.1421.