摘要： 采用浸渍煅烧法对活性炭纤维进行Al₂O₃负载改性，对改性前后活性炭纤维的微观结构、电化学性能和除盐性能进行分析比较，并探讨了影响其电吸附除盐效果的影响因素，结果表明：改性后活性炭纤维电吸附除盐性能得到极大增强，除盐能力为改性前的2.68倍。且电极具备很好的再生性；其表面出现了絮状和颗粒状的Al₂O₃，比表面积减小，中孔增加，孔径分布更加合理，比电容提高了2.1倍。当电压为2.0 V，极板间距为1 cm，NaCl质量浓度为500 mg/L时，除盐效率可达到64.6%。

关键词: 电吸附, 活性炭纤维, Al₂O₃负载, 除盐

Abstract: Activated carbon fiber has been modified by Al₂O₃-loaded dipping calcination method. The micro-struc-ture,electrochemical performance and desalination performance of the activated carbon fiber before and after the modification are analyzed and compared,and the influencing factors that affecting electro-adsorption desalination efficiency are discussed. The results show that the electro-adsorption desalination performance of the modified acti-vated carbon fiber are enhanced greatly. The desalination capability is 2.68 times of that before the modification. In addition,the electrodes have very good reproducibility. Flocculent and granular Al₂O₃ has appeared on its sur-faces,having smaller specific surface and more middle-size mesopores. The pore-size distribution gets more rea-sonable and specific capacitance has increased by 2.1 times. When the voltage is 2.0 V,the distance between the electrodes is 1 cm and NaCl mass concentration is 500 mg/L,the desalination efficiency of the modified activated carbon fiber can reach 64.6%.

Key words: electro-adsorption, activated carbon fiber, Al₂O₃-loaded, desalination

中图分类号: 

• X703.1