Anatase TiO2 powders were treated by gamma-irradiation. The change of catalysts and their effect on the production of hydroxyl radicals were characterized by electron paramagnetic resonance (EPR) spectroscopy. Anatase TiO2 showed four typical peaks at g=2.005, g= 1.992, g= 1.973, and g= 1.951. The intensity of the peaks was increased by gamma-irradiation, and the increase was positively dependent on irradiation dose. The intensity of the peaks is deeply related to the efficiency of hydroxyl radical production by photocatalysis, and the efficiency was directly proportional to the difference of Ti3+ (g= 1.992) and O (g=2.005) intensity. Moreover, the photooxidative decomposition of perchloroethylene (PCE) was linearly dependent on the efficiency of hydroxyl radical production.
|Number of pages||5|
|Journal||Journal of Industrial and Engineering Chemistry|
|Publication status||Published - 2002|
- Anstase TiO
- Hydroxyl radicals
ASJC Scopus subject areas
- Chemical Engineering(all)