Abstract
| Original language | English |
|---|---|
| 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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Study of solid/gas phase photocatalytic reactions by electron ionization mass spectrometry. / Nuño, Manuel; Ball, Richard J.; Bowen, Chris R.
In: Journal of Mass Spectrometry, Vol. 49, No. 8, 01.08.2014, p. 716-726.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Study of solid/gas phase photocatalytic reactions by electron ionization mass spectrometry
AU - Nuño, Manuel
AU - Ball, Richard J.
AU - Bowen, Chris R.
PY - 2014/8/1
Y1 - 2014/8/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84904436977&partnerID=8YFLogxK
UR - http://dx.doi.org/10.1002/jms.3396
U2 - 10.1002/jms.3396
DO - 10.1002/jms.3396
M3 - Article
VL - 49
SP - 716
EP - 726
JO - Journal of Mass Spectrometry
JF - Journal of Mass Spectrometry
SN - 1076-5174
IS - 8
ER -