TiO2 Nanotubes with Tunable Morphology, Diameter, and Length: Synthesis and Photo-Electrical/Catalytic Performance
TiO2 Nanotubes with Tunable Morphology, Diameter, and Length: Synthesis and Photo-Electrical/Catalytic Performance
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具有可调形态、直径和长度的 TiO2 纳米管：合成和光电/催化性能
DOI：
10.1021/cm802384y
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发表时间：
2009-04-14
影响因子：
8.6
通讯作者：
Liu, Weimin
中科院分区：
文献类型：
--
作者：
Wang, Daoai;Liu, Ying;Liu, Weimin
本文报道了通过调整阳极氧化过程中的反应条件来平衡电化学反应和化学腐蚀，从而合成形貌可调的TiO2纳米管。从而在可控的条件下获得了不同长度和直径的纳米多孔和独立纳米碳管，解决了传统阳极氧化中的束化、密封和蚀刻坑问题。TiO2纳米阵列的生长速度达到60 μm/h，孔径为120 nm。在250 ~ 600 nm的紫外和可见光照射下，研究了NT光电极的光电化学响应，结果表明，光响应发生在300 ~ 400 nm之间，最大值在355 nm。纳米孔TiO2薄膜由于缺陷少、排列完美，具有比无孔NTs阵列更高的光电流密度。然而，光催化降解亚甲基蓝的性能呈现相反的趋势：独立TiO2 NTs的光催化降解性能优于…
This article reports on the synthesis of TiO2 nanotubes (NTs) with tunable morphologies by adjusting the reaction conditions during anodization to balance electrochemical reaction and chemical etching. Nanoporous and free-standing NTs with different lengths and diameters are thus obtained in a controlled manner, solving the bundling, sealing, and etching pit issues in the conventional anodization. The high growth speed (60 μm/h) of TiO2 NT arrays with the pore diameter of 120 nm was achieved. The photoelectrochemical response of the NT photoelectrodes is studied under both UV and visible illumination from 250 to 600 nm, showing that the photoresponse occurred between 300−400 nm with the maximum value at 355 nm. The nanoporous TiO2 film has the higher photocurrent density than the nonporous NTs array because of fewer defects and perfect alignment. However, the photocatalytic performance to degrade methylene blue showed an inverse trend: the free-standing TiO2 NTs have better photocatalytic degradation than...