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采用阳极氧化法制备出TiO_2纳米管阵列,对比了3种电解液体系[(a)氢氟酸+硫酸+水、(b)氟化钠+甘油+水、(c)氟化铵+乙二醇]对纳米管阵列形貌及光催化性能的影响。结果表明:3种电解液体系中制备出了不同长径比的TiO_2纳米管阵列,样品经450℃热处理后,主要为锐钛矿相TiO_2,同时具有良好的紫外光吸收能力,并在可见光范围内产生不同程度的波动。其中电解液(b)制备出的纳米管因具有合适的长径比而表现出优异的光催化降解气相苯的性能。
TiO 2 nanotubes arrays were prepared by anodic oxidation and compared with three electrolyte systems [(a) hydrofluoric acid + sulfuric acid + water, (b) sodium fluoride + glycerin + water, (c) ammonium fluoride + Alcohol] on the nanotube array morphology and photocatalytic performance. The results showed that TiO 2 nanotubes with different aspect ratios were prepared in the three electrolyte systems. The samples were mainly anatase phase TiO 2 after heat treatment at 450 ℃, and had good ultraviolet absorption capacity. In the visible range There are different levels of volatility. The nanotubes prepared from the electrolyte solution (b) exhibit excellent photocatalytic performance for degradation of gaseous benzene by having a suitable aspect ratio.