Nitrogen ions-implanted TiO2 nanotubes (TNTs) were prepared by the methods of ion implantation and electrochemical anodic oxidation. The prepared samples were applied in photoelectrocatalytic (PEC) oxidation of methyl blue, rhodamine B and bisphenol A. Compared with pure TNTs, morphology, crystallinity, chemical structure, photoelectric and PEC ability of doped samples were greatly promoted because of ion implantation. The experimental results propose that the electronic structure of TiO2 was modified because of the emergence of impurity states in the band gap by introducing nitrogen into the lattice, leading to the absorption of visible light. The synergy effects of tubular structures, doped nitrogen ions and the bias potential on the circuit are responsible for highly efficient and stable PEC activities induced by visible light and UV light. The doped TNTs prepared using the method of ion implantation could be applied to various areas, such as PEC water splitting and dye sensitized solar cells.

中文翻译：

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使用注入氮离子的 TiO2 纳米管增强光电催化降解有机污染物

采用离子注入法和电化学阳极氧化法制备了氮离子注入的TiO2纳米管(TNTs)。制备的样品用于甲基蓝、罗丹明B和双酚A的光电催化氧化。与纯TNTs相比，离子注入大大提高了掺杂样品的形貌、结晶度、化学结构、光电和PEC能力。实验结果表明，由于在带隙中出现杂质态，通过将氮引入晶格，从而导致对可见光的吸收，TiO2 的电子结构发生了改变。管状结构、掺杂氮离子和电路上的偏置电位的协同效应是由可见光和紫外光诱导的高效和稳定的 PEC 活动的原因。