微波辐射离子液体中TiO2/PS-PEMA复合材料的制备及其性能

以钛酸丁酯为前驱物,在离子液体([Bmim]BF_4)中采用微波辐射加热法合成了TiO_2/PS-PEMA复合材料。通过测试复合材料在乙酸乙酯中的吸光度以及对甲基橙溶液的降解率,考察了离子液体用量、微波功率、反应温度和反应时间等因素对复合材料分散性和光催化活性的影响。结果表明,制备TiO_2/PS-PEMA复合材料的最佳条件为:离子液体用量2.0 mL,微波功率700 w,反应温度70℃,反应时间45 min和引发剂过硫酸钾用量0.10 g。制得的复合材料亲油性大大提高,在乙酸乙酯中有较好的分散性,对甲基橙具有较高的光催化降解活性。

Microwave assisted preparation of TiO2/PS-PEMA composite material in ionic liquids and its properties

Using Ti-OC4H9 as the precursor, TiO2/PS-PEMA composite material was prepared in ionic liquids [ Bmim] BF4 under microwave irradiation. Influence of ionic liquid volume, microwave power, reaction temperature and reaction time on dispersibility and photocatalytic behaviors of TiO2/PS-PEMA was investigated by determination of its absorbency in ethyl acetate and activity for methyl orange degradation under ultraviolet irradiation. The results indicated that optimal condition for preparation of TiO2/ PS-PEMA was as follows： [.Bmim ] BF4 2.0 mL, microwave power 700 W, reaction temperature 70℃, reaction time 45 min and dosage of potassium persulfate 0.10 g. Lipophilic capability of TiO2、PS-PEMA was greatly enhanced, with good dispersibility in ethyl acetate and high photocatalytic activity for methyl orange degradation.