水体中邻苯二甲酸酯的光催化降解

以湿法浸渍法合成质量分数为5.0%的CuO/TiO₂为催化剂, 考察不同光照条件、 体系初始pH值及催化剂用量对4种邻苯二甲酸酯（PAEs）光催化降解效率的影响, 并用电喷雾萃取电离质谱法（EESI MS）检测不同光照时间的邻苯二甲酸二丁酯(DBP)降解反应过程溶液. 结果表明： 在紫外光作用下, 当体系初始pH=6, 催化剂质量浓度为20 mg/L时, PAEs降解效果最好. 根据偏最小二乘法判别分析(PLS-DA)结果， 推测出DBP光催化降解可能的中间产物, 并在最佳反应条件下给出DBP可能的光催化降解路径.

Photocatalytic Degradation of Phthalate Esters in Water

Using mass fraction of 50%CuO-TiO2 as the catalyst which synthesized by wet impregnation method, we investigated the effects of different illumination conditions, initial pH value of the system and catalyst dosage on the photocatalytic degradation efficiency of four kinds of phthalate esters (PAEs), and detected the degradation process solution of dibutyl p hthalate (DBP) with different illumination time by electrospray extractive ionization mass spectrometry (EESI MS). The results show that the degradation efficiency of PAEs is the best under the condition of ultraviolet light, the initial pH=6 and the mass concentration of catalyst is 20 mg/L. According to the result of partial least squares discriminant analysis (PLS-DA), we surmised the possible degradation intermediates of DBP, and give the possible photocatalytic degradation pathway of DBP under the optimal reaction conditions.