为制备更长的TiO_2纳米管,在0.5%Na F(质量分数)+甘油溶液中,20 V直流电压下,分别在0,20和40℃的温度下对Ti片进行阳极氧化7 h。SEM观察结果表明:得到的TiO_2纳米管长度分别为1034、2601和5152 nm;p H值测试结果表明:温度升高,溶液扩散系数增大,试样附近H+扩散加快,试样附近p H值减小速度慢。在40℃的0.5%Na F+甘油溶液中对Ti片进行阳极氧化12 h,TiO_2纳米管长度超过了10μm。 In order to prepare longer TiO 2 nanotubes, the Ti wafers were anodized for 7 h at 0, 20 and 40 ℃ respectively in a 0.5% Na F (mass fraction) + glycerol solution at 20 V DC. The SEM results showed that the lengths of TiO 2 nanotubes obtained were 1034, 2601 and 5152 nm, respectively. The results of p H value test showed that the increase of temperature, the increase of solution diffusion coefficient, the acceleration of H diffusion near the sample and the p H value near the sample Slow down. Ti films were anodized in 0.5% NaF + glycerol solution at 40 ℃ for 12 h, and the length of TiO 2 nanotubes exceeded 10 μm.