Some observations about the photocatalytic oxidation of cyanate to nitrate over TiO2

Agustín Bravo, Josep Garcia, Xavier Domènech, José Peral

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)

Abstract

The photocatalytic oxidation of cyanate ions in aqueous solution and in the presence of TiO 2 takes place by two different reaction pathways, depending on the solution pH. For pHs lower than 10, the main oxidation product is nitrate instead of N 2 , as reported previously. The hydrolysis of cyanate seems to be the reason for this change of mechanism with pH. NH +4 is formed by CNO - hydrolysis, and its photo-oxidation gives nitrite and nitrate. The hydrolysis rate controls the speed of the whole process, but the photo-oxidation of CNO - to N 2 appeared to be faster in a strongly basic medium. For values of pH lower than 5, NH +4 is hardly oxidized, remaining stable in solution. © 1994.
Original languageEnglish
Pages (from-to)2461-2463
JournalElectrochimica Acta
Volume39
Issue number16
DOIs
Publication statusPublished - 1 Jan 1994

Keywords

  • cyanate
  • oxidation
  • photocatalysis TiO 2
  • semiconductor.

Fingerprint Dive into the research topics of 'Some observations about the photocatalytic oxidation of cyanate to nitrate over TiO<sub>2</sub>'. Together they form a unique fingerprint.

Cite this