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以钛酸丁酯为前驱物,在离子液体([Bmim]BF4)中采用微波辐射加热法合成了TiO2/聚苯乙烯(PS)复合材料,用TG、XRD、IR、XPS和SEM对复合材料进行了表征.通过测试复合材料在乙酸乙酯中的吸光度及对甲基橙溶液的降解率,考察了离子液体体积、微波功率、反应温度、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:微波助离子液体介质中制备TiO2/PS复合材料的最佳条件是:钛酸丁酯与ST体积比为3.4∶1.1,[Bmim]BF42.0mL,微波功率700W,反应温度50℃,反应时间60min;在离子液体介质中使用微波辐射加热制备TiO2/PS复合材料,能够降低反应的温度,极大地缩短反应的时间;且制得的复合材料的亲油性能大大提高,在乙酸乙酯中具有较好的分散性,该复合材料不需要高温煅烧就具有较高的光催化活性(紫外光照射1.5h甲基橙降解率为96.2%).
TiO2 / polystyrene (PS) composites were synthesized by microwave radiation heating in ionic liquid ([Bmim] BF4) using butyl titanate as precursor. The composites were characterized by TG, XRD, IR, XPS and SEM Were characterized by measuring the absorbance of the composite material in ethyl acetate and methyl orange solution degradation rate, investigated the ionic liquid volume, microwave power, reaction temperature, reaction time and other factors on the dispersion and photocatalytic activity of the composite .The results show that the optimal conditions for the preparation of TiO2 / PS composite in microwave assisted ionic liquid are as follows: the molar ratio of butyl titanate to ST is 3.4:1.1, [Bmim] BF42.0mL, microwave power 700W, reaction temperature 50 ℃ and the reaction time is 60min. The preparation of TiO2 / PS composites by microwave radiation in ionic liquids can reduce the reaction temperature and greatly shorten the reaction time. The lipophilic properties of the prepared composites are greatly improved. Ethyl acrylate has good dispersibility, the composite material does not require high temperature calcination has a higher photocatalytic activity (1.5h UV degradation of methyl orange was 96.2%).