中文摘要：

采用电化学阳极氧化的方法,分别以HF酸水溶液和含NH_4F的丙三醇溶液为电解液,制备出高度有序的TiO2纳米管电极.扫描电镜结果表明,TiO2纳米管生长形貌良好,其中有机电解质溶液中制备的TiO2纳米管管长为3μm,而水溶液中制备的TiO2纳米管长度仅为300 nm.TiO2纳米管电极经450℃热处理后,表现出明显的锐钛型结构.两种TiO2纳米管电极均具有较好的光电催化活性,在偏压为4 V时,光电流分别为1.37 mA·cm^-2和0.83 m A·cm^-2,其中管长3μm电极在180 min内对50 mg·L^-1四环素TOC的去除效果约为93%.该电极具有较高的稳定性,重复使用5次,光电催化过程对四环素废水均具有较高的降解效果.在180 min内,四环素的降解率均保持在92%±1%,可重复使用.

英文摘要：

By means of anodic oxidation,highly ordered TiO2 nanotube array electrodes were prepared in the electrolytes,respectively with HF acid solution and NH4 F glycerol solution. Scanning electron microscopy（ SEM） results showed that TiO2 nanotube arrays were of uniform morphology.The length of TiO2 nanotube arrays prepared in organic electrolyte was 3 μm,while the length prepared in aqueous solution was 300 nm. XRD patterns showed obvious peaks of anatase after heat treating at 450 ℃. TiO2 nanotube array electrodes also had good photoelectrocatalytic activities. At a bias potential of 4 V,the photocurrents were 1. 37 mA·cm^-2 and 0. 83 mA·cm^-2,respectively. By using the 3 μm electrode,the removal efficiency of 50 mg·L^-1 tetracycline reached 93% within180 min. The electrodes were highly stable after 5 repeated tests,and the degraclation rate of tetracycline was 92% ±1%.