Abstract
Photodecay of o-chloroaniline (o-ClA) in various combinations of UV sources, TiO2, and oxyhalogens was investigated. To improve the conventional photocatalytic process by using UV/TiO2, the addition of oxyhalogens (ClO3-, BrO3-and IO3-) into UV/TiO2system was studied and the effect in such addition is very encouraging for all the selected additives. Oxyhalogens are capable of deferring the electron-hole recombination of TiO2which significantly improved its catalytic performance. The presence of IO3-in UV/TiO2resulted in the fastest o-ClA decay among three oxhalogens at the same dosage. The decay of o-ClA in UV/TiO2/oxyhalogen process is characterized by a two-stage pseudo-kinetics, where a faster initial decay was followed by a retardation state. A mathematics model was successfully established for the prediction of the two-stage decay of o-ClA in UV / TiO2/ IO3-with any designed [IO3-] concentration.
| Original language | English |
|---|---|
| Pages (from-to) | 2106-2113 |
| Number of pages | 8 |
| Journal | Chemosphere |
| Volume | 66 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - 1 Feb 2007 |
Keywords
- Mineralization
- o-Chloroaniline
- Oxyhalogens
- Photodecay
- Radicals
- TiO 2
ASJC Scopus subject areas
- Environmental Chemistry
- General Environmental Science