Combustion of fossil fuels in vehicles results in emissions of gases such as NOx and CO2; these gases can lead to diminished air quality and contribute to global warming. The environmental impact and introduction of legislation (i.e. EU DIRECTIVE 98/69/EC) have made the regulation of emissions from road vehicle exhausts essential. Research into the sensing of pollutant exhaust gases can result in more efficient fuel use if the measured gas concentrations are fed back into the on-board computer, which can control fuel and air intake levels in modern road vehicles.
Through combination of the research expertise in porous thin film fabrication at the University of Bath with the advanced characterization and gas testing facilities at the Laboratoire Catalyse et Spectrochimie, Caen, the aim is to produce suitable exhaust gas sensor technologies and thin film sensor elements. The final goal is more sensitive, more selective and more robust sensors.
Porous materials were used to form thin films. Two classes of materials were chosen, metal organic frameworks (MOFs) and mesoporous silicas. The MOFs used were MIL-101(Cr) derivatives and ZIF-8. MIL-101(Cr) possesses good thermal and hydrolytic stability and the derivatives are expected to show increased selectivity to particular gases. Furthermore, in the literature, it has been demonstrated that ZIF-8 possesses high selectivity for CO2. The mesoporous silica used was amine functionalised SBA-15, the porosity of which had been greatly controlled. This thin film sample was prepared by Prof. Viveka Alfredsson and her research group at Lunds Universitet. Preliminary FT-IR gas adsorption studies with MOF thin films and sensing results for the thin film of amine functionalized SBA-15 on a quartz-crystal microbalance (QCM) sensor will be presented.
In addition, the latest results from work on the design and testing of suitable exhaust gas sensor technologies, e.g. QCM and optical sensors, will be discussed.
Original languageEnglish
Publication statusUnpublished - 2014
EventAnglo-French Days on Materials for Energy Efficient Transport - Paris, France
Duration: 30 Jun 20141 Jul 2014


WorkshopAnglo-French Days on Materials for Energy Efficient Transport


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