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Wang, Y.; Liu, L.; Meng, C.; Zhou, Y.; Gao, Z.; Li, X.; Cao, X.; Xu, L. and Zhu, W., "A novel ethanol gas sensor based on TiO2/Ag0.35V2O5 branched nanoheterostructures," Scientific Reports, 6(1), 33092, September 2016. [Online].

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Article

From Titanium Foil to Gas Sensor: Nanoporous Anodic Titania as a Functional Material

1Department of Chemistry Education, Georg-August-University, Göttingen, Germany


World Journal of Chemical Education. 2023, Vol. 11 No. 3, 54-59
DOI: 10.12691/wjce-11-3-6
Copyright © 2023 Science and Education Publishing

Cite this paper:
Edwin Bogdan, Christoph Weidmann, Thomas Waitz. From Titanium Foil to Gas Sensor: Nanoporous Anodic Titania as a Functional Material. World Journal of Chemical Education. 2023; 11(3):54-59. doi: 10.12691/wjce-11-3-6.

Correspondence to: Thomas  Waitz, Department of Chemistry Education, Georg-August-University, Göttingen, Germany. Email: twaitz@gwdg.de

Abstract

We present a gas sensor using nanoporous titanium dioxide which is fabricated by anodic oxidation of a titanium foil. The process is easy to handle, can be carried out at low cost and the sensor response to reducing gases can be measured using a cheap digital multimeter. In contrast to the most gas sensors, no commercially available sensor substrate is required. The band model for semiconductors and a model of ionosorption provides an explanation for the working principle of the gas sensor on particle level. Several experimental approaches for upper-secondary chemistry class are presented.

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