【作者】 刘海； 王潮霞；

【Author】 LIU Hai,WANG Chao-xia (Key Laboratory of Eco-Textile,Ministry of Education,Jiangnan University,Wuxi,214122,China)

【机构】 生态纺织教育部重点实验室江南大学纺织服装学院；

【摘要】 以钛酸正丁酯为前驱体,乙醇为溶剂,盐酸为催化剂在20℃制备具有光催化活性的TiO₂溶胶。在40W,波长253.7nm紫外光灯照条件下,研究了活性橙K-GN染料溶液被TiO₂溶胶光催化降解的可能性。研究了水的摩尔比、pH值、光照时间、染料初始浓度对降解率的影响,并且比较了TiO₂溶胶与添加H₂O₂的溶胶的光催化活性。实验结果表明,当溶胶中钛酸丁酯:水摩尔比为1:100,pH值为1.0、光照时间80min、染料初始浓度为20mg/L时,降解率达到98%;H₂O₂可以促进TiO₂溶胶的处理效果,添加量为0.03%时促进效果明显。更多还原

【Abstract】 The TiO₂ sol is prepared through Sol-Gel method.Ti（OC₄H₉）₄ is chosen as a precursor, and ethanol as impregnant,HCl as catalyzer.The TiO₂ sol was prepared under 20℃.The degradation of K-GN（C.I.Reactive Orange 2）,commonly used as textile dye,can be photocatalyzed by TiO₂ sol under UV light.The feasibility of the photocatalytic degradation of reactive orange 2,in aqueous solution using TiO₂ sol was investigated.The degradation can be completed in the order of minutes at optimal operational parameters.The effects of pH on the decoloration rate were studied under UV light with 253.7nm of main wavelength.The optimal initial concentration of reactive orange 2 for the process was also examined.The degradation rate reached 98%at the ultrasonic irradiaton of 40W power in 80min.The best conditions for maximum photocatalytic degradation were found to be pH 1.0.The photocatlytic degradation rate is high when the initial concentration of reactive orange 2 is 20mg/L.Using TiO₂ sol and comparison between photoactivity of TiO₂ sol and TiO₂ sol added H₂O₂ reveal that,H₂O₂ can be used as a suitable alternative to TiO₂ sol for water treatment.更多还原