Rare earth doped metal oxide sensor for the multimodal detection of volatile organic compounds (VOCs)
Fois, Matteo; Cox, Timothy; Ratcliffe, Norman; de Lacy Costello, Ben
Dr Timothy Cox Timothy.Cox@uwe.ac.uk
Norman Ratcliffe Norman.Ratcliffe@uwe.ac.uk
Professor in Materials & Sensors Science
Benjamin De Lacy Costello Ben.DeLacyCostello@uwe.ac.uk
Associate Professor in Diagnostics and Bio-Sensing Technology
Heated metal oxide sensors have been widely studied for their ability to give a reversible change in the electrical resistance following the interaction with a volatile compound. Another feature is their inherent cataluminescence (CTL) properties when these materials interact with specific volatiles. This study reports for the first time a zirconium oxide nanomaterial doped with a rare earth metal which gives combined resistance and cataluminescence responses, providing enhanced sensitivity and selectivity of detection via a multimodal response in a single sensor. The europium-doped zirconium oxide, ZrO2:Eu3+ was studied and compared with the undoped zirconium oxide, ZrO2, and tungsten oxide, WO3. Materials were characterised structurally and tested with a series of volatiles. Both the cataluminescence light emission and the resistance response were recorded at different temperatures (starting from 180 °C up to 400 °C) and then combined to achieve the dual modality response. Europium-doped zirconium oxide gave a better sensitivity in terms of cataluminescence response than the undoped zirconium oxide sensor; dual modality sensing is demonstrated for ethanol and acetone which give cataluminescence and resistance responses on both the undoped and europium doped zirconia.
Fois, M., Cox, T., Ratcliffe, N., & de Lacy Costello, B. (2021). Rare earth doped metal oxide sensor for the multimodal detection of volatile organic compounds (VOCs). Sensors and Actuators B: Chemical, 330, https://doi.org/10.1016/j.snb.2020.129264
|Journal Article Type||Article|
|Acceptance Date||Nov 24, 2020|
|Online Publication Date||Dec 1, 2020|
|Publication Date||Mar 1, 2021|
|Deposit Date||Dec 3, 2020|
|Publicly Available Date||Dec 2, 2021|
|Journal||Sensors and Actuators B: Chemical|
|Peer Reviewed||Peer Reviewed|
|Keywords||Instrumentation; Electrical and Electronic Engineering; Materials Chemistry; Electronic, Optical and Magnetic Materials; Surfaces, Coatings and Films; Condensed Matter Physics; Metals and Alloys; Gas sensing; Multimodal; Cataluminescence; Rare-earth ions;|
This file is under embargo until Dec 2, 2021 due to copyright reasons.
Contact Timothy.Cox@uwe.ac.uk to request a copy for personal use.
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