Abstract: Using salicylic acid(SA) as template molecule and O-diaminobenzyl as functional monomers,the molecularly imprinted polymer has been synthesized on the surface of TiO₂ by UV polymerization method,and the molecularly imprinted TiO₂(MIP-TiO₂) prepared. The prepared MIP-TiO₂ has been characterized by means of FT-IR,XRD, etc.,and the photo-catalytic degradation capability of MIP-TiO₂ for salicylic acid investigated. The results show that the prepared MIP-TiO₂ still keeps the same titanium anatase structure as TiO₂,but the degradation effect on salicylic acid is much higher than that of TiO₂. When the dosage of MIP-TiO₂ is 0.6 g/L,ultraviolet irradiation 180 min,and SA mass concentration 10 mg/L,the SA removing rate reaches 86.65%,which is 1.7 times of the result of using unmodified TiO₂.

Key words: molecularly imprinting, titanium dioxide, salicylic acid, photocatalysis

摘要： 以水杨酸（SA）为模板分子、邻苯二胺为功能单体，采用紫外光聚合法，在TiO₂表面合成分子印迹聚合物，制备了分子印迹TiO₂（MIP-TiO₂）。利用FT-IR、XRD等方法对制备的MIP-TiO₂进行了表征，并考察了MIP-TiO₂对废水中水杨酸的光催化降解性能。结果表明，制备的MIP-TiO₂具有和TiO₂一样的钛锐矿相结构，但其对水杨酸的降解效果明显优于TiO₂。当MIP-TiO₂投加量为0.6 g/L，紫外光照180 min，SA质量浓度为10 mg/L时，SA去除率达到86.65%，是未改性TiO₂的1.7倍。

关键词: 分子印迹, TiO₂, 水杨酸, 光催化

CLC Number: 

• X703.1