TiO_2光催化氧化性能的影响因素

The Influences on Photocatalyzing Properties of TiO_2

采用负载型TiO2 光催化剂处理含酚废水 ,研究光源、光照时间、废水液pH值等因素对苯酚去除率的影响。结果表明 ,由于紫外光所发出的光子能量大 ,TiO2 光催化活性强 ,因此在处理过程中 ,用高压汞灯照射比太阳光照射效果好 ;尽管光照时间超过 5h后苯酚去除率仍有所增加 ,但从生产工艺和经济的角度考虑 ,光照时间以 5h为宜 ;TiO2 光催化剂的氧化性能在酸性或碱性条件下最好 ,在处理含酚废水时 ,pH值为 2

An immobilized TiO 2 photocatalyst is choosed to treat phenol dicharge. The authors study the remove efficiencies under different conditions through experiments, such as lamping lights,time that the photocatalyst is lamped,pH of phenol dicharge and so on. It is showed that a satisfactory can be presented in the condition that the photocatalyst is lamped by mercury light and the time that light lamping lasts 5 hours long and pH of phenol dicharge is in 2.0.