纳米TiO2光催化降解双酚A的研究

Study on Photocatalytic Degradation of Bisphenol A Using Nano TiO2

采用溶胶-凝胶法制备了纳米TiO2。以纳米TiO2为光催化剂，研究了在氧气存在条件下对典型内分泌干扰物质双酚A的光催化降解反应。分别讨论了分子氧、不同晶型、不同晶粒尺寸的纳米TiO2以及光照时间对双酚A降解反应的影响。结果表明，以0．2L／min的通氧速度进行光化学反应5h，锐钛矿型TiO2晶粒尺寸在10-20mm时对双酚A的光催化降解效率最好。

The nano TiO2 is prepared by sol-gel method. The photocatalytie degradation of bisphenol A（BPA）, a representative endocrine disruptor, is studied with the photoeatalyst of nano TiO2 under molecular oxygen. The effects of the existence of molecular oxygen, the crystal form and the grain size of nano TiO2, the irradiation time on the photocatalytic degradation of BPA are investigated. The results show that the best condition for photocatalytic degradation of BPA is 5 hour irradiation using 10-20nm anatase type TiO2 under O2 （0. 2L/min）.