摘要
在离子液体([Bmim]BF_4)中采用微波辐射加热法合成了TiO_2/PEMA复合材料,用XRD、SEM和IR对其进行表征。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/PEMA复合材料的最佳条件:离子液体2.0 mL,钛酸丁酯3.4 mL,甲基丙烯酸乙酯1.0 mL,微波功率600 W,反应温度70℃,反应时间45 min。制备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,该复合材料不需要高温焙烧就具有较高的光催化活性,紫外光照射1.5 h,甲基橙降解率为99.4%。
TiO2/PEMA composite material was prepared by microwave irradiation with one-step method in ionic liquids （ [ Bmim ] BF4 ） and vacuum drying , and characterized by means of XRD, SEM and IR. By testing its absorbency in ethyl acetate and photocatalytic activity with methyl orange as degradation agent and using ultraviolet lamp as light source, the influence of ionic liquid volume, microwave power, reaction temperature and reaction time on dispersing capability and photocatalytic activity of TiO2/PEMA was investigated. The results indicated that the optimal preparation condition of TiO2/PEMA was as follows： [Bmim] BF4 2.0 mL, Ti-OC4H9 3.4 mL, EMA 1.0 mL, microwave power 600 W, reaction temperature 70 ℃ and reaction time 45 min. The lipophilic capability of TiO2/PEMA was greatly improved. TiO2/PEMA exhibited better dispersive capability in ethyl acetate and higher photocatalytic degradation activity, degradation ratio of methyl orange 99.4% under ultraviolet irradiation for 1.5 h.
出处
《工业催化》
CAS
2010年第7期18-23,共6页
Industrial Catalysis
基金
国家自然科学基金资助项目(20663007)
