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Citation: Wang Hai, Chen De-Wen, Xu Guang-Zhi. ESR Studies of Active Free Radicals Produced in the Degradation Processes of Phenol Derivatives on the Surface of Superfine Colloid Particles[J]. Acta Physico-Chimica Sinica, ;1994, 10(07): 597-603. doi: 10.3866/PKU.WHXB19940705 shu

ESR Studies of Active Free Radicals Produced in the Degradation Processes of Phenol Derivatives on the Surface of Superfine Colloid Particles

1.
The State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Academia Sinica, Beijing 100080

Received Date: 12 December 1992
Available Online: 15 July 1994

The photo-induced electron transfer and photochemical of processes phenol and its derivatives on the surface of superfine titanium dioxide colloid particles were studied. It was demonstrated that phenol was more ready to degradate on colloid surface in basic solution. The main degradation products are hydrogen atom and benzene-oxyl radical. The hydroxyl radical of the system was formed from superoxide radical, and not from hydroxide anion. The mechanisms of the photo-induced electron transfer and photochemical reactions were discussed.
- Phenol,
- Colloid,
- Photodegradation,
- ESR,
- Free radical
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