Heterogeneous photocatalytic reduction of Fe(VI) in UV-irradiated titania suspensions: effect of ammonia Academic Article uri icon

abstract

  • Results of the heterogeneous photocatalytic reduction of Fe(VI) in UV-irradiated TiO2 suspensions in the presence of ammonia are presented. The initial rate of Fe(VI) reduction, R, may be expressed as R = k Fe(VI)[Fe(VI)]1.25 where k Fe(VI) = a[Ammonia]+b), a = 6.0 103 m 0.25 s and b = 4.1 106 m -1.25s-1. The rate constant, k Fe(VI), increases with the ammonia concentration. The photocatalytic oxidation of ammonia is enhanced in the presence of Fe(VI). A mechanism involving Fe(V) as a reactive intermediate is presented which explains the faster photocatalytic oxidation of ammonia in the presence of Fe(VI). Springer 2005.

published proceedings

  • JOURNAL OF APPLIED ELECTROCHEMISTRY

author list (cited authors)

  • Sharma, V. K., & Chenay, B.

citation count

  • 16

complete list of authors

  • Sharma, VK||Chenay, BVN

publication date

  • July 2005