Abstract Vertically aligned α-Fe2O3 nanorod arrays were synthesized by a quasi-topotactic transition of solvothermal derived β-FeOOH nanowire-like arrays on a fluorine-doped tin oxide (FTO) coated glass substrates. Co-existence of chloride ions and acetonitrile in the precursor solutions was found to be essential for synthesizing [211]-oriented β-FeOOH nanowire-like arrays . Field-emission scanning electron microscopy (FE-SEM) observation revealed that heterogeneous nucleation of β-FeOOH preferentially occurs on ridges of the FTO crystal than flat surfaces. High-resolution transmission electron microscopy (HR-TEM) and selected-area electron diffraction (SAED) studies revealed that the [110]-oriented α-Fe2O3 nanorod arrays were successfully formed. [110]-oriented α-Fe2O3 nanorod arrays prepared by this method exhibit pronounced photocurrent response under visible light illumination. Photo-electrochemical properties of α-Fe2O3 nanorod arrays were discussed from the viewpoint of its electronic and crystal structures.

中文翻译：

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通过溶剂热衍生的 β-FeOOH 纳米线状阵列的准全规转化制备的 α-Fe2O3 纳米棒阵列的表征

摘要 垂直排列的 α-Fe2O3 纳米棒阵列是通过溶剂热衍生的 β-FeOOH 纳米线状阵列在掺氟氧化锡 (FTO) 涂层玻璃基板上的准全规转变合成的。发现前体溶液中氯离子和乙腈的共存对于合成 [211] 取向的 β-FeOOH 纳米线状阵列至关重要。场发射扫描电子显微镜 (FE-SEM) 观察表明，β-FeOOH 的异质成核优先发生在 FTO 晶体的脊上，而不是平面。高分辨率透射电子显微镜 (HR-TEM) 和选区电子衍射 (SAED) 研究表明，[110] 取向的 α-Fe2O3 纳米棒阵列已成功形成。通过该方法制备的 [110] 取向 α-Fe2O3 纳米棒阵列在可见光照射下表现出明显的光电流响应。从电子结构和晶体结构的角度讨论了α-Fe2O3纳米棒阵列的光电化学性质。