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以不同含水量的乙二醇溶液为电解液,采用阳极氧化法制备TiO2纳米管阵列。通过记录反应过程中电导率、粘度及回路电流随时间的变化曲线,研究含水量对电解液粘度、电导率及电流等过程参数的影响,分析了纳米管形貌尺寸与TiO2溶蚀所耗电荷量的关系。粘度初始值和初始电导率均与含水量呈三次关系,相关系数分别为0.992 5和0.977 8。在反应过程中,溶液粘度值有缓慢增加的趋势。由于不同含水量的电解液粘度的不同,H+和OH-数量不同,F-迁移速率不同,电导率-时间曲线及电流-时间曲线具有不同的变化趋势,并对其进行了理论分析。当水体积分数为4%,5%,6%和10%时,纳米管的形貌较为有序并且TiO2纳米管阵列表面的碎片较少,纳米管直径变化范围为50nm至72nm,长度变化范围为0.85~1.90μm。F-腐蚀氧化膜时所消耗电量与TiO2氧化膜被腐蚀掉的体积呈一次函数关系,即腐蚀电量越大,腐蚀掉的体积越大,为制备一定形貌尺寸的纳米管提供了一定的控制方法。
TiO2 nanotube arrays were prepared by anodic oxidation using ethylene glycol solution with different water content as electrolyte. The effects of water content on the process parameters such as viscosity, conductivity and current of the electrolyte were studied by recording the curves of conductivity, viscosity and the current of the loop over time. The effects of nanotubes morphology on the dissolution of TiO2 The amount of relationship. The initial value of viscosity and the initial conductivity both showed a cubic relationship with the water content, and the correlation coefficients were 0.992 5 and 0.977 8, respectively. During the reaction, the viscosity of the solution tends to increase slowly. Due to the different viscosity of the electrolyte with different water content, the amount of H + and OH- is different, the F- migration rate is different, the conductivity-time curve and the current-time curve have different trends, and the theoretical analysis is made. When the volume fraction of water is 4%, 5%, 6% and 10%, the morphology of the nanotubes is more orderly and the surface of the TiO2 nanotube array is less fragmented. The diameter of the nanotube varies from 50 nm to 72 nm. Is 0.85 to 1.90 μm. F-corrosion oxide film consumes electricity and TiO2 oxide film was corroded volume has a function, that is, the larger the corrosive power, the larger the corroded volume, for the preparation of a certain size nanotubes provide some control method.