Photocatalytic degradation of triethylamine on titanium oxide thin films

Aimin Huang, Lixin Cao, Jie Chen, Franz Josef Spiess, Steven L. Suib, Timothy N. Obee, Steve O. Hay, James Freihaut

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Photooxidation of triethylamine (TEA) in the presence of O 2 , N 2 , and H 2 O over titanium oxide (TiO 2 ) was investigated using a flat plate reactor. TEA was photocatalytically oxidized to CO 2 and some by-products on TiO 2 thin film catalysts. The intrinsic oxidation rate of the reaction was determined and was dependent on TEA concentration, humidity level, and light intensity. Photocatalytic deactivation was observed in these reactions. Fourier transform infrared (FTIR) and temperature-programmed desorption with a mass spectrometer as a detector (TPD-MS) were used to characterize the surface of the catalyst and study the deactivation mechanism. FTIR and TPD-MS results suggest that accumulation of carboxylic acid species, -N-N=O, and some other carbonaceous species occurred during the reaction. These by-product species or intermediates were chemisorbed on the catalyst surface. They were stable under reaction conditions and might be responsible for deactivation of TiO 2 by either poisoning the active sites directly or blocking the adsorption of TEA on the catalyst surface.

Original languageEnglish (US)
Article numberjcat.1999.2617
Pages (from-to)40-47
Number of pages8
JournalJournal of Catalysis
Volume188
Issue number1
DOIs
StatePublished - Jan 1 1999

Fingerprint

Titanium oxides
titanium oxides
Oxide films
Temperature programmed desorption
deactivation
degradation
catalysts
Degradation
Thin films
Catalysts
thin films
Byproducts
Fourier transforms
Infrared radiation
Photooxidation
photooxidation
poisoning
Mass spectrometers
Carbon Monoxide
flat plates

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

Huang, A., Cao, L., Chen, J., Spiess, F. J., Suib, S. L., Obee, T. N., ... Freihaut, J. (1999). Photocatalytic degradation of triethylamine on titanium oxide thin films. Journal of Catalysis, 188(1), 40-47. [jcat.1999.2617]. https://doi.org/10.1006/jcat.1999.2617
Huang, Aimin ; Cao, Lixin ; Chen, Jie ; Spiess, Franz Josef ; Suib, Steven L. ; Obee, Timothy N. ; Hay, Steve O. ; Freihaut, James. / Photocatalytic degradation of triethylamine on titanium oxide thin films. In: Journal of Catalysis. 1999 ; Vol. 188, No. 1. pp. 40-47.
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abstract = "Photooxidation of triethylamine (TEA) in the presence of O 2 , N 2 , and H 2 O over titanium oxide (TiO 2 ) was investigated using a flat plate reactor. TEA was photocatalytically oxidized to CO 2 and some by-products on TiO 2 thin film catalysts. The intrinsic oxidation rate of the reaction was determined and was dependent on TEA concentration, humidity level, and light intensity. Photocatalytic deactivation was observed in these reactions. Fourier transform infrared (FTIR) and temperature-programmed desorption with a mass spectrometer as a detector (TPD-MS) were used to characterize the surface of the catalyst and study the deactivation mechanism. FTIR and TPD-MS results suggest that accumulation of carboxylic acid species, -N-N=O, and some other carbonaceous species occurred during the reaction. These by-product species or intermediates were chemisorbed on the catalyst surface. They were stable under reaction conditions and might be responsible for deactivation of TiO 2 by either poisoning the active sites directly or blocking the adsorption of TEA on the catalyst surface.",
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Huang, A, Cao, L, Chen, J, Spiess, FJ, Suib, SL, Obee, TN, Hay, SO & Freihaut, J 1999, 'Photocatalytic degradation of triethylamine on titanium oxide thin films', Journal of Catalysis, vol. 188, no. 1, jcat.1999.2617, pp. 40-47. https://doi.org/10.1006/jcat.1999.2617

Photocatalytic degradation of triethylamine on titanium oxide thin films. / Huang, Aimin; Cao, Lixin; Chen, Jie; Spiess, Franz Josef; Suib, Steven L.; Obee, Timothy N.; Hay, Steve O.; Freihaut, James.

In: Journal of Catalysis, Vol. 188, No. 1, jcat.1999.2617, 01.01.1999, p. 40-47.

Research output: Contribution to journalArticle

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AU - Freihaut, James

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N2 - Photooxidation of triethylamine (TEA) in the presence of O 2 , N 2 , and H 2 O over titanium oxide (TiO 2 ) was investigated using a flat plate reactor. TEA was photocatalytically oxidized to CO 2 and some by-products on TiO 2 thin film catalysts. The intrinsic oxidation rate of the reaction was determined and was dependent on TEA concentration, humidity level, and light intensity. Photocatalytic deactivation was observed in these reactions. Fourier transform infrared (FTIR) and temperature-programmed desorption with a mass spectrometer as a detector (TPD-MS) were used to characterize the surface of the catalyst and study the deactivation mechanism. FTIR and TPD-MS results suggest that accumulation of carboxylic acid species, -N-N=O, and some other carbonaceous species occurred during the reaction. These by-product species or intermediates were chemisorbed on the catalyst surface. They were stable under reaction conditions and might be responsible for deactivation of TiO 2 by either poisoning the active sites directly or blocking the adsorption of TEA on the catalyst surface.

AB - Photooxidation of triethylamine (TEA) in the presence of O 2 , N 2 , and H 2 O over titanium oxide (TiO 2 ) was investigated using a flat plate reactor. TEA was photocatalytically oxidized to CO 2 and some by-products on TiO 2 thin film catalysts. The intrinsic oxidation rate of the reaction was determined and was dependent on TEA concentration, humidity level, and light intensity. Photocatalytic deactivation was observed in these reactions. Fourier transform infrared (FTIR) and temperature-programmed desorption with a mass spectrometer as a detector (TPD-MS) were used to characterize the surface of the catalyst and study the deactivation mechanism. FTIR and TPD-MS results suggest that accumulation of carboxylic acid species, -N-N=O, and some other carbonaceous species occurred during the reaction. These by-product species or intermediates were chemisorbed on the catalyst surface. They were stable under reaction conditions and might be responsible for deactivation of TiO 2 by either poisoning the active sites directly or blocking the adsorption of TEA on the catalyst surface.

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Huang A, Cao L, Chen J, Spiess FJ, Suib SL, Obee TN et al. Photocatalytic degradation of triethylamine on titanium oxide thin films. Journal of Catalysis. 1999 Jan 1;188(1):40-47. jcat.1999.2617. https://doi.org/10.1006/jcat.1999.2617