水中活性艳红K-2BP光催化分解初探

Preliminary Study on Decomposition of Activated Bright Red K-2BP in Water by Photochemical Catalysis

在模拟阳光照射下,研究水中活性艳红K-2BP悬浊态TiO_2催化分解的条件和机理.染料的初始浓度、TiO_2投加量、空气鼓入量、光照时间、光强、溫度、pH值等因素都对反应产生较大的影响;在最佳光解条件下,光照3.5 h,有90%以上的染料分解;分解反应主要发生在发色基团-N=N-被氧化断裂,苯环和萘环较难被破坏.

The photooxidation mechanism and the factors affecting decomposition of activated dye Bright Red K-2BP in water by suspended TiO_2 and simulated sunlight has been preliminarily studied in this paper.The results showed that many factors,including dye pre-liminary concentration,TiO_2 quantity,air flow rate,reaction time,light strength,tempera-ture,ect.,have greater affection on the reaction.After irradiating 3.5h,over 90% dye is decomposed in the best conditions.In the process of photodissociation,azo group of K-2BP molecule is destructed,but aromatic ring is difficultly destructed.