H₂S is usually used as one of the landmark gases for meat freshness detection under low temperature storage conditions. In this paper, the NiO-doped CuO composite derived from MOFs was synthesized by a low temperature (−25 ℃) precursor hydrothermal and sintering procedure for H₂S detection. The influence of precursor solution temperature and sintering temperature on the structure of MOFs derivatives were discussed by SEM, TEM, and XRD characterization. The hydrothermal method of low-temperature precursor has guiding significance in improving the gas response performance of MOFs/MOFs derivatives. The sensor based on NiO-doped CuO composites derived from MOFs exhibited a ppb-level response to H₂S gas. The sensor response is 106 % to 50 ppb H₂S. Meanwhile, the sensor has good selectivity, and the response and recovery time are 115 s and 251 s, respectively. The low temperature precursor hydrothermal method directly affected the morphology and structure of MOFs derivatives by regulating the kinetics for MOFs nucleation and crystal growth, obtains more active adsorption sites. In addition, the composite has good sensing performance for H₂S at the ambient temperature of 4 ℃ and −18 ℃, which verified the effectiveness for the detection of meat spoilage under a low temperature storage. Furthermore, the sensor based on NiO-doped CuO composites is a good candidate for H₂S gas detection in meat freshness evaluation. Finally, an integrated circuit detection system was designed to detect H₂S gas at different ambient temperatures. This work provides a new idea for meat freshness detection in a cold storage environment.

H ₂ S 通常用作低温储存条件下肉类新鲜度检测的标志性气体之一。在本文中，通过低温（-25 ℃）前驱体水热和烧结工艺合成了由 MOFs 衍生的 NiO 掺杂的 CuO 复合材料，用于 H ₂ S 检测。通过SEM、TEM和XRD表征讨论了前驱体溶液温度和烧结温度对MOFs衍生物结构的影响。低温前驱体水热法对提高MOFs/MOFs衍生物的气体响应性能具有指导意义。基于源自 MOF 的 NiO 掺杂的 CuO 复合材料的传感器对 H ₂ S 气体表现出 ppb 级的响应。传感器响应为 106 % 至 50 ppb H ₂S. 同时，该传感器具有良好的选择性，响应时间和恢复时间分别为115 s和251 s。低温前驱体水热法通过调控MOFs成核和晶体生长的动力学，直接影响MOFs衍生物的形貌和结构，获得更多的活性吸附位点。此外，该复合材料在4 ℃和-18 ℃环境温度下对H ₂ S具有良好的传感性能，验证了低温贮藏下肉类腐败检测的有效性。此外，基于NiO掺杂CuO复合材料的传感器是肉类新鲜度评价中H _{2 S气体检测的良好候选者。}最后，设计了一种集成电路检测系统来检测H ₂不同环境温度下的 S 气体。该工作为冷藏环境下的肉类新鲜度检测提供了新思路。