A La₂Ti₂O₇/La(OH)₃ nanocomposite was prepared by the one-step hydrothermal method. Humidity sensing properties of this material were investigated based on the impedance-type sensor in the relative humidity range of 11–94%. This material in the tested humidity range shows a large impedance change of more than four orders of magnitude. This impedance change is one order larger than that of the sensors based on La₂Ti₂O₇ and La(OH)₃. Excitingly, the impedance has an excellent linear relationship with humidity with a figure of merit R² = 0.995. The enhanced humidity properties of the La₂Ti₂O₇/La(OH)₃-based sensor are argued to be due to the existence of a heterojunction between La₂Ti₂O₇ and La(OH)₃. The excellent linearity was argued to be due to the synergetic effect of the heterojunction and Grotthuss mechanism.

中文翻译：

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La2Ti2O7/La(OH)3 纳米复合材料增强的湿度传感性能

采用一步水热法制备了La ₂ Ti ₂ O ₇ /La(OH) ₃纳米复合材料。基于阻抗型传感器在 11-94% 的相对湿度范围内研究了该材料的湿度传感特性。这种材料在测试的湿度范围内表现出超过四个数量级的大阻抗变化。该阻抗变化比基于La ₂ Ti ₂ O ₇和La(OH) ₃的传感器的阻抗变化大一个数量级。令人兴奋的是，阻抗与湿度具有极好的线性关系，品质因数R ² = 0.995。La 增强的湿度特性₂ Ti ₂ O ₇ /La(OH) ₃基传感器被认为是由于La ₂ Ti ₂ O ₇和La(OH) ₃之间存在异质结。出色的线性被认为是由于异质结和 Grotthuss 机制的协同作用。