采用水热法成功合成纳米片结构的钼酸铜（Cu₃Mo₂O₉）。样品的形貌、结构和比表面积通过SEM、XRD、EDS等技术进行表征。以Cu₃Mo₂O₉纳米片和MoO₃纳米棒为传感材料分别制备气体传感器，并进行挥发性有机气体的传感性能测试。实验结果表明：传感器暴露于100×10^-6丙酮时，Cu₃Mo₂O₉传感器在210 ℃下表现出145.4的超高响应，是MoO₃传感器响应（67.8）的2.1倍，响应/恢复时间为29.7 s/21.2 s。利用暴露在100×10^-6丙酮的10次循环测试，证明了Cu₃Mo₂O₉传感器具有优异的循环稳定性。其优异的丙酮传感性能归因于本身的多孔纳米片结构以及铜和钼两种金属元素之间的协同作用。其结构比表面积较大，为气体分子吸附提供大量活性位点，促进气体之间的氧化还原反应，使反应进行得更加彻底。Cu₃Mo₂O₉纳米片对丙酮有优异的传感性能，说明在未来丙酮气体的实际检测中有很大潜力。

Copper molybdate （Cu₃Mo₂O₉） with nanosheet structure is synthesized by a hydrothermal method. The morphology， structure， and specific surface area of the sample are characterized by techniques such as SEM， XRD， and EDS. Two gas sensors are fabricated with Cu₃Mo₂O₉ nanosheets and MoO₃ nanorods as sensing materials. The sensing performances of the two sensors for volatile organic gases are tested. It is found that when the sensors are exposed to 100×10^-6 acetone， the Cu₃Mo₂O₉ sensor shows an ultra-high response of 145.4 at 210 ℃. This response is about 2.1 times that of the MoO₃ sensor （67.8）. The response/recovery time are 29.7 s/21.2 s， respectively. The excellent cycling stability of the Cu₃Mo₂O₉ sensor is demonstrated by 10-cycle tests exposed to 100×10^-6 acetone. Its excellent sensing properties are attributed to its porous nanosheet structure and the synergistic interaction between the two metal elements copper and molybdenum. The structure has a large specific surface area， providing a large number of surface active sites for the adsorption of gas molecules， promoting the redox reaction between gases. Cu₃Mo₂O₉ nanosheet sensor shows excellent sensing properties for acetone， indicating that it has great potential in the practical detection of acetone gas in the future.