以钛酸丁酯为前驱体，活性炭纤维（ACF）为载体，采用溶胶凝胶-超声辅助-浸渍提拉的方法制备活性炭纤维负载二氧化钛光催化复合材料（TiO₂/ACF）。利用SEM和XRD对材料的表面形貌及晶型结构进行表征，并研究了制备工艺对其光催化降解乙烯性能的影响。结果表明，TiO₂以点块状形式成功负载于ACF，对ACF的吸附性能影响较小；所制得的TiO₂晶型为锐钛矿型，负载工艺对TiO₂的晶型结构几乎没有影响；当pH为2.5、加水量为2.5 mL、煅烧温度为350℃、超声分散时间为30 min时，ACF浸渍提拉3次制得的TiO₂/ACF光催化性能最优，经过2 h的反应后降解乙烯的效率为71.62%。

Using butyl titanate as titanium source and activated carbon fiber as carrier,titanium dioxide/activated carbon fiber (TiO₂/ACF) composite is prepared by the sol-gel-dipping pulling method with the assistance of ultrasound.The surface morphology and crystal structure of the samples are analyzed by scanning electron microscope (SEM) and X-ray diffraction (XRD).Furthermore,the effects of pH,addition amount of water,calcination temperature,ultrasonic time and cycle of dipping pulling on the samples' photo-catalytic properties in degradation of ethylene are studied.SEM and XRD results show that TiO₂ is of anatase crystalline phase and has been successfully supported onto activated carbon fiber in a point or block form,which has little effect on the adsorption property of ACF.The loading process has hardly affected the crystal structure of TiO₂.The best photo-catalytic performance is obtained by TiO₂/ACF composite that is prepared by dipping and pulling the ACF into the TiO₂ suspension for three times when the pH value is 2.5,the addition amount of water is 2.5 mL,the calcination temperature is at 350℃,and the ultrasonic time is 30 min.Over the best composite,the degradation efficiency of ethylene can reach 71.62% after two hours of reaction.

劳彩娴(1994-),女,硕士研究生,主要研究方向为食品包装材料,aianaolcx@163.com