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用阳极氧化法在钛片表面制备空白TiO_2纳米管阵列,用电化学阴极还原法在其表面沉积锰,通过正交试验考察沉积条件对锰修饰TiO_2纳米管阵列光电响应的影响。结果表明,锰的表面修饰可以增强TiO_2纳米管阵列对可见光的响应,在0.5 V(vs.SCE)的偏电压下,光电流显著增大。沉积时间和沉积电压是影响锰沉积的主要因素,锰沉积的最佳条件为:沉积时间30 s、电压-2 V、锰离子浓度10 mmol/L。
Anodic oxidation was used to prepare blank TiO 2 nanotube arrays on the surface of titanium. Electrochemical cathodic reduction was used to deposit manganese on the surface of the TiO 2 nanotubes. The effects of deposition conditions on the electro-optic response of manganese-modified TiO 2 nanotubes arrays were investigated by orthogonal experiments. The results show that the surface modification of Mn can enhance the visible light response of TiO 2 nanotube arrays. The photocurrent is significantly increased at a bias voltage of 0.5 V (vs.SCE). The deposition time and deposition voltage are the main factors affecting the deposition of manganese. The optimum conditions for deposition of manganese are: deposition time of 30 s, voltage of -2 V and manganese concentration of 10 mmol / L.