School of Material Science and Engineering, Hebei University of Technology, Dingzigu Road 1, Tianjin 300130, China.
J Hazard Mater. 2011 Apr 15;188(1-3):231-4. doi: 10.1016/j.jhazmat.2011.01.100. Epub 2011 Feb 1.
Zirconia nanotubes with a length of 25 μm, inner diameter of 80 nm, and wall thickness of 35 nm were prepared by anodization method in mixture of formamide and glycerol (volume ratio = 1:1) containing 1 wt% NH(4)F and 1 wt% H(2)O. Experiments showed that zirconia nanotubes and ultrasonic wave had synergistic degradation effect for methyl orange and the efficiency of ultrasonic wave increased by more than 7 times. The decolorization percentage was influenced by pH value of the solution. Methyl orange was easy to be degraded in acidic solution. The decolorization percentage of methyl orange reached 97.6% when degraded for 8h in 20mg/L methyl orange solution with optimal pH value 2. The reason of synergistic degradation effect for methyl orange might be that adsorption of methyl orange onto zirconia nanotubes resulted in the easy degradation of the methyl orange through ultrasonic wave.
采用电化学阳极氧化法在由乙酰胺和甘油（体积比为 1:1）组成的电解液中制备了长度为 25μm、内径为 80nm、壁厚为 35nm 的氧化锆纳米管，电解液中含有 1wt%NH(4)F 和 1wt%H(2)O。实验表明，氧化锆纳米管和超声波对甲基橙具有协同降解作用，超声波的效率提高了 7 倍以上。溶液的 pH 值影响着甲基橙的脱色率，甲基橙在酸性溶液中容易被降解，当在最佳 pH 值 2 的 20mg/L 甲基橙溶液中降解 8h 时，甲基橙的脱色率达到 97.6%。甲基橙产生协同降解作用的原因可能是甲基橙通过超声吸附在氧化锆纳米管上，导致甲基橙容易降解。
