One-dimensional α-MoO₃ nanorods were synthesized by a hydrothermal method and BiVO₄ nanoparticles were grown directly onto the α-MoO₃ nanorods using a simple metal organic decomposition process in order to construct an α-MoO₃/BiVO₄ composite with a heterojunction, for the fabrication of a rapid response triethylamine (TEA) sensor. The morphology and structure of the composite were characterized via various spectral techniques and the sensing properties of the sensor for TEA were investigated via resistance measurements. The results showed that the response of the 16Mo/Bi composite to 20 ppm TEA was 1.86 times and 15 times higher than those of α-MoO₃ and BiVO₄, respectively, at an optimum operating temperature of 125 °C. The enhancement can be ascribed to the existence of a heterojunction between α-MoO₃ and BiVO₄, creating an additional barrier at the interface of the heterojunction, and this increases the resistance of the composite in air and decreases the resistance in TEA, thus enhancing the response of the composite to TEA.

中文翻译：

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用于三乙胺选择性检测的新型α-MoO3/ BiVO4复合物

一维α-的MoO _3个纳米棒通过水热法合成，BiVO ₄纳米颗粒直接生长到α-的MoO _3个使用简单的金属有机分解过程中为了构建α-的MoO纳米棒₃ / BiVO ₄复合带异质结，用于制造快速响应的三乙胺（TEA）传感器。通过各种光谱技术对复合材料的形貌和结构进行了表征，并通过电阻测量研究了TEA传感器的传感特性。结果表明，16Mo / Bi复合材料对20 ppm TEA的响应是α-MoO的1.86倍和15倍。₃和BiVO ₄的最佳工作温度分别为125°C。增强可以归因于α-的MoO之间的异质结的存在₃和BiVO ₄，创建在异质结的界面的附加屏障，并且这增加了复合材料在空气中的阻力，并且降低茶叶中的电阻，从而提高了复合材料对TEA的响应。