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Electrospun copper oxide nanofibers for H2S dosimetry

Title data

Hennemann, Jörg ; Sauerwald, Tilman ; Kohl, Claus-Dieter ; Wagner, Thorsten ; Bognitzki, Michael ; Greiner, Andreas:
Electrospun copper oxide nanofibers for H2S dosimetry.
In: Physica Status Solidi A. Vol. 209 (May 2012) Issue 5 . - pp. 911-916.
ISSN 1521-396X
DOI: https://doi.org/10.1002/pssa.201100588

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

We present the preparation and characterization of a novel copper(II)oxide (CuO) nanofiber based sensor with very high sensitivity and selectivity to hydrogen sulfide (H2S). The working principle is based on the phase transition of semi-conducting p-type CuO to strongly degenerated p-type copper sulfide (CuS) with metallic conductivity. Electrospun polymer fiber networks of polyvinyl butyrate (PVB) and Cu(NO3)(2) were attached on standard gas sensing substrates and calcined to CuO at 600 degrees C in ambient air for 24 h. Continuous exposure to H2S (0.1-5 ppm) as well as a sequence of 1 ppm H2S pulses result in a dosimeter type behavior of the nanofiber sensors. Triggered by a certain dose (gas concentration multiplied by time) a steep conductance increase of the sensitive layer over several orders of magnitude is observed. After reaching this percolation threshold only small conductance changes were observed. These fiber based sensors show a remarkably high specificity, there is no response to carbon monoxide, hydrogen, and methane at 160 degrees C. The fiber network can be regenerated by raising the operating temperature to 350 degrees C for 30 min in absence of H2S.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: copper oxide; gas sensor; hydrogen sulfide; nanofibers
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 31 Mar 2015 09:40
Last Modified: 31 Mar 2015 09:40
URI: https://eref.uni-bayreuth.de/id/eprint/9498