Abstract
This paper describes a novel methodology for the real-time study of solid-gas phase photocatalytic reactions in situ. A novel reaction chamber has been designed and developed to facilitate the investigation of photoactive materials under different gas compositions. UV irradiation in the wavelength of ranges 376-387 and 381-392 nm was provided using specially designed high efficiency light emitting diode arrays. The experiments used air containing 190 ppm NO in a moist environment with a relative humidity of 0.1%. Photocatalytic samples consisting of pressed pellets of rutile and anatase crystalline forms of TiO were monitored over a period of 150 min. An ultra-high vacuum right angled bleed valve allowed a controlled flow of gas from the main reaction chamber at atmospheric pressure to a residual gas analyser operating at a vacuum of 10 mbar. The apparatus and methodology have been demonstrated to provide high sensitivity (ppb). The rate of degradation of NO attributed to reaction at the TiO surface was sensitive to both crystal structures (anatase or rutile) and wavelength of irradiation.
Original language | English |
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Pages (from-to) | 716-726 |
Number of pages | 11 |
Journal | Journal of Mass Spectrometry |
Volume | 49 |
Issue number | 8 |
Early online date | 8 Jul 2014 |
DOIs | |
Publication status | Published - 1 Aug 2014 |
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Dive into the research topics of 'Study of solid/gas phase photocatalytic reactions by electron ionization mass spectrometry'. Together they form a unique fingerprint.Profiles
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Richard Ball
- Department of Architecture & Civil Engineering - Reader
- Centre for Sustainable and Circular Technologies (CSCT)
- Centre for Integrated Materials, Processes & Structures (IMPS)
Person: Research & Teaching, Core staff
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Chris Bowen
- Department of Mechanical Engineering - Professor
- Centre for Sustainable and Circular Technologies (CSCT)
- Centre for Nanoscience and Nanotechnology
- Institute for Mathematical Innovation (IMI)
- Faculty of Engineering and Design - Associate Dean (Research)
- Institute for Sustainability
- Centre for Integrated Materials, Processes & Structures (IMPS)
- EPSRC Centre for Doctoral Training in Advanced Automotive Propulsion Systems (AAPS CDT)
- Institute for Advanced Automotive Propulsion Systems (IAAPS)
Person: Research & Teaching, Core staff, Affiliate staff