采用原位阳极氧化法在Ti基底上制备了高度有序的Ti02纳米管阵列薄膜,分别在O2,空气,Ar和H2气氛中于5000C进行结晶热处理,考察了热处理气氛对TiO2纳米管阵列薄膜光电催化降解亚甲基蓝(MB)反应性能的影响.结果表明,在这些气氛中热处理得到的锐钦矿晶型的纳米管阵列薄膜对MB降解满足一级反应,其速率常数分别为4.967,3.127,1.989和1.625 h-1(0.5V).电化学阻抗分析表明,TiO2纳米管的光电催化性能受控于光生电荷的传递特性.在O2中热处理,TiO2纳米管的光吸收及激发性能得以改善,且电荷传递阻抗降低,因而其光电催化性能最好.
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