水含量在钛阳极氧化制备TiO2纳米管中的作用及其性能

S. Nishanthi, S. Iyyapushpam, Pathinettam Padiyan
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引用次数: 1

摘要

研究并优化了钛箔阳极氧化过程中含水量对制备的TiO2纳米管光电化学活性的影响。通过x射线衍射确定了TiO2的混合相,并用高分辨率扫描电镜分析了TiO2随含水量增加而发生的形态变化。通过改变阳极氧化过程中的水含量,TiO2的光学带隙可以有效地从3.023(2)eV调节到2.601(7)eV。结晶度较高的TiO2样品最大光电流密度为2.5 mA/cm2。这些结果表明,具有有序纳米管的高结晶度和小带隙是提高TiO2光电化学活性的关键因素。
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Role of water content in anodization of titanium to fabricate TiO2 nanotubes and its properties
The effect of water content in anodization of Ti foil on photoelectrochemical activity of TiO2 nanotubes fabricated were studied and optimized. The mixed phase of TiO2 was confirmed from X-ray diffraction and their morphological changes with respect to increase in water content were analyzed using High Resolution Scanning Electron Microscope. The optical band gap of TiO2 can be effectively tuned from 3.023(2) to 2.601(7) eV by varying the water content in anodization. The maximum photocurrent density of 2.5 mA/cm2 was observed for the TiO2 sample with higher crystallinity. These results suggest that the higher crystallinity with ordered nanotubes and lesser band gap act as a key role in improving the photoelectrochemical activity of TiO2.
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