Photocatalytic degradation reactions of aquatic nitrogenous organic compounds using pure and modified titania

Wonyong Choi, Jaesang Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Photocatalytic degradation (PCD) of NH 3, alkylamines, and alkylammoniums was systematically studied in aerated and deaerated aqueous suspensions of pure or modified titania. While the slow photocatalytic oxidation of NH 3 to nitrite/nitrate was the only pathway for decomposition of NH 3 on naked TiO 2, a new pathway, that of selective oxidation of NH 3 to dinitrogen, opened up on Pt/TiO 2. The PCD of tetramethylammoniums on TiO 2 showed successive demethylation processes to generate tri-, di-, and mono-methylammonium as an intermediate and ammonium and nitrate as a final product in the presence of dissolved oxygen, but it did not take place without oxygen. However, the absence of dissolved oxygen increased the PCD rates of alkylamines on Pt/TiO 2, and generated products that were different from those formed on pure TiO 2. Alkylamine degradation using surface-fluorinated TiO 2 or silica-modified TiO 2 photocatalyst was discussed. This is an abstract of a paper presented at the 228th ACS National Meeting (Philadelphia, PA 8/22-26/2004).

Original languageEnglish
Title of host publicationACS National Meeting Book of Abstracts
Volume228
Edition1
Publication statusPublished - 2004
Externally publishedYes
EventAbstracts of Papers - 228th ACS National Meeting - Philadelphia, PA, United States
Duration: 2004 Aug 222004 Aug 26

Other

OtherAbstracts of Papers - 228th ACS National Meeting
CountryUnited States
CityPhiladelphia, PA
Period04/8/2204/8/26

Fingerprint

Organic compounds
Degradation
Dissolved oxygen
Oxidation
Photocatalysts
Nitrites
Silicon Dioxide
Nitrates
Suspensions
Oxygen
Decomposition
titanium dioxide

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

Photocatalytic degradation reactions of aquatic nitrogenous organic compounds using pure and modified titania. / Choi, Wonyong; Lee, Jaesang.

ACS National Meeting Book of Abstracts. Vol. 228 1. ed. 2004.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Choi, W & Lee, J 2004, Photocatalytic degradation reactions of aquatic nitrogenous organic compounds using pure and modified titania. in ACS National Meeting Book of Abstracts. 1 edn, vol. 228, Abstracts of Papers - 228th ACS National Meeting, Philadelphia, PA, United States, 04/8/22.
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