The aggregation and the rapid restructuring of the photoinduced electron−hole pairs restructuring in the process of photoelectric response remains a great challenge. In this study, a kind of Multi-walled carbon nanotubes loaded Alpha-Fe₂O₃ (CNTs/α-Fe₂O₃) heterostructure composite is successfully prepared via the one-step method. Due to the synergistic effect in the as-prepared CNTs/α-Fe₂O₃, the defect sites and oxygen-containing functional groups of CNTs can dramatically improve the interface charge separation efficiency and prevent the aggregation of α-Fe₂O₃. The improved photocurrent and enhanced hole–electron separation rate in the CNTs/α-Fe₂O₃ is obtained, and the narrower band gap is measured to be 2.8 ev with intensive visible-light absorption performance. Thus, the CNTs/α-Fe₂O₃ composite serves as an excellent visible light photocatalyst and exhibits an outstanding photocatalytic activity for the cationic dye degradation of rhodamine B (RhB). This research supplies a fresh application area forα-Fe₂O₃ photocatalyst and initiates a new approach for design of high efficiency photocatalytic materials.

中文翻译：

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高效制备Alpha-Fe2O3纳米粒子的多壁CNT的一步式构建

在光电响应过程中，光诱导的电子-空穴对重组的聚集和快速重组仍然是一个巨大的挑战。在这项研究中，一种多壁碳纳米管的加载阿尔法-铁₂ ö ₃（碳纳米管/的α-Fe ₂ ö ₃）异质结构的复合经由一步法成功地制备。由于协同作用所制备的碳纳米管/的α-Fe ₂ ø ₃中，缺陷部位和CNT的含氧官能团可以显着提高界面电荷分离效率和防止聚集的α-Fe ₂ ö ₃。改进的光电流和增强的空穴-电子分离速率在所述CNT /的α-Fe ₂ ö ₃获得，而较窄的带隙被测量为2.8 EV密集可见光吸收性能。因此，所述CNT /的α-Fe _2个ö ₃复合用作出色的可见光光催化剂和显示出对罗丹明B（罗丹明B）的阳离子染料劣化的杰出的光催化活性。这项研究提供了一个新的应用领域forα -铁₂ Ø ₃光触媒和同修的高效率的光催化材料设计的新方法。