导　　师： 张化宇

学科专业： 080501

授予学位： 硕士

作　　者： ;

机构地区： 哈尔滨工业大学

摘　　要： TiO2纳米管由于其优良的电化学性能，稳定的物理化学性质，近年来吸引了很多研究人员的兴趣。作为一种新型的宽带隙功能半导体材料，可以广泛的应用在光电催化、太阳能电池、传感器和生物医药方面。目前纳米管阵列的制备方法有很多种，不同制备方法获得纳米管阵列的结构形貌有所不同，相应的纳米管的性质也存在一些差异。本课题中采用的是TiO2纳米管最常用的制备方法阳极氧化法。研究了在水基和水-丙三醇混合电解液中一步氧化法合成TiO2纳米管时，氧化参数对纳米管阵列结构形貌和性能的影响；并在此基础上着重探索了两步阳极氧化法制备TiO2纳米管阵列的工艺，根据纳米管阵列的形貌结构变化规律，总结两步阳极氧化法制备纳米管的生长机理。结合磁控溅射的方法先在导电玻璃（FTO）上预溅射一层钛膜，然后再用阳极氧化方法制备导电玻璃基TiO2纳米管阵列。同时研究了退火对TiO2纳米管晶体结构的影响，确定TiO2的相变温度。 水溶液中TiO2纳米管阵列的制备研究。论文首先讨论了在NH4F-H2O电解液中一步阳极氧化法制备TiO2纳米管阵列，研究发现氧化过程中氧化参数对纳米管阵列的直径和长度的有显著的影响；接着在此基础上重点研究了两步阳极氧化法制备TiO2纳米管阵列，纳米管阵列的结构形貌受氧化时间和氧化电压的影响。两步法制备的TiO2的带隙随着制备过程中氧化参数的变化而变化。 水-丙三醇混合电解液中TiO2纳米管阵列的制备研究。在含有NH4F的水-丙三醇混合电解液中一步阳极氧化法制备TiO2纳米管阵列时，纳米管的结构形貌随着氧化时间、温度、pH值、含水量和电压的变化变化；在混合电解液中采用两步阳极氧化法制备TiO2纳米管阵列时，由于第一步氧化时间、pH值以及H2O2含量的不同，导致最终生成的纳米� TiO2nanotubes have attracted considerable attention for its excellentelectrochemical and stable physics, chemical properties. TiO2nanotubes have beenwidely applied in photoelectron catalysis, solar cells, sensors and biomedicine. Theinfluences of anodization parameters on the nanotube array structure and morphologywere studied in the aqueous electrolyte and mixed electrolyte of water and glycerol viaone-step anodization. Moreover, the processes of two-step anodization were explored onthe base of one-step anodization and growth mechanisms were researched. Thenconductive glass-based /(FTO-based/) nanotubes were prepared by anodizationcombined with magneton sputtering process. At the same time, the effects of annealingtemperature on the TiO2nanotubes crystal structure were researched and obtained phasetransition temperature. Study on TiO2nanotube arrays prepared in aqueous electrolyte. TiO2nanotubearrays were prepared via one-step anodization in the aqueous electrolyte containingNH4F, studied the action regular pattern of anodization parameters on the TiO2nanotubearrays structure and morphology. And then focus were centralized on the two-stepanodization on the base of one-step anodization. During two-step anodiztion process,analyzed the influences of electrolyte solution species, the first step anodization timeand the second anodizaton voltages on the TiO2nanotubes diametr and length. Study on TiO2nanotubes arrays prepared in the mixed electrolyte of water andglycerol. TiO2nanotube arrays were firstly anodized in the mixed solution containingNH4F via one-step anodization and the influences of anodization parameters on the TiO2nanotube diameter and length were discussed. Then on the base of one-step anodizationprocess, two-step anodization was applied in TiO2nanotube preparation. Analyzed theaction regular pattern on the TiO2nanotube structure and morphology of two-step pHvalues, the first step anodization time and H2O2concentration, and recognized thenanotube growth mechanisms. FTO-based TiO2nanotubes array

关 键 词： 纳米管阵列 两步阳极氧化 退火 导电玻璃基

领　　域： [化学工程] [一般工业技术]