Unique coral-like ZnFe₂O₄–ZnO heterojunction architectures with abundant mesopores are successfully prepared via a facile two-step process. The as-fabricated ZnFe₂O₄–ZnO heterojunction architecture sensor is used for the detection of the volatile organic compound triethylamine (TEA). The gas sensing performance of the as-prepared sensor is carefully investigated and the results show high response value, fast response/recovery times, good repeatability, and superior selectivity with regard to TEA detection. Specifically, the sensing response of the ZnFe₂O₄–ZnO sensor is remarkably improved and shows a fast response time of 0.9 s. The enhanced sensing mechanism of the coral-like mesoporous heterojunction architectures is discussed and a possible growth mechanism is also proposed.

中文翻译：

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珊瑚状ZnFe2O4–ZnO介孔异质结结构：三乙胺的合成和增强的传感性能

通过简便的两步法成功制备了具有丰富中孔的独特珊瑚状ZnFe ₂ O ₄ -ZnO异质结结构。制成的ZnFe ₂ O ₄ -ZnO异质结结构传感器用于检测挥发性有机化合物三乙胺（TEA）。仔细研究了所制备传感器的气体传感性能，结果显示出较高的响应值，快速的响应/恢复时间，良好的可重复性以及就TEA检测而言具有出色的选择性。具体而言，ZnFe ₂ O ₄的感测响应–ZnO传感器得到了显着改进，并具有0.9 s的快速响应时间。讨论了珊瑚状介孔异质结结构的增强传感机制，并提出了可能的生长机制。