Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations. Issue 5 (27th February 2013)

• Record Type: Journal Article
• Authors: Hennemann, Jörg; Kohl, Claus‐Dieter; Reisert, Steffen; Kirchner, Patrick; Schöning, Michael J.
• Is Part Of: Physica status solidi. Volume 210:Issue 5(2013:May)
• Page Start: 859
• Page End: 863
• Publication Date: 2013-02-27
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201200775
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="pssa201200775-sec-0001" sec-type="section"> <p>We present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H<sub>2</sub>S to get an enclosed surface. By a thermal treatment at 350 °C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H<sub>2</sub>O<sub>2</sub> concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p‐type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H<sub>2</sub>O<sub>2</sub>. At operating temperatures below 450 °C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H<sub>2</sub>O<sub>2</sub> vapour at high concentrations. <inline-graphic xlink:href="ark:/27927/pgg20q120pt" content-type="pssa201200775-gra-0001" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /></p> <p>Resistance behaviour of the sensor under exposure to H<sub>2</sub>O<sub>2</sub> vapours between 2.3 and 6.9% v/v at an operating temperature of 450 °C.</p> </sec> </abstract>