采用阳极氧化法在Ti片上制备高度取向的TiO2纳米管阵列.室温下,电压60V,在含有0.5%(质量分数)NH4F,1%(体积分数)HF,2%(体积分数)H2O的乙二醇电解液中,通过改变阳极氧化时间(8～20h),反应制得管长约为6.7～19.5μm,管径约为90～110nm,管壁约为20nm的TiO2纳米管阵列.利用SEM、TEM、EDS对TiO2纳米管的形貌和化学组分进行表征.采用XRD、SAED证实TiO2纳米管阵列的结构.分析不同长度纳米管阵列紫外-可见光反射率曲线,发现较长的纳米管对可见光有更强的吸收能力.将不同长度的纳米管阵列封装成染料敏化电池(DSSC),研究纳米管长度对电池性能参数的影响.
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