Sun Zhenchao, Sun Shanfu, Hao Xidong, Wang Yinglin, Gong Caili, Cheng Pengfei
School of Aerospace Science and Technology, Xidian University, Xi'an 710126, China.
School of Electronic Information Engineering, Inner Mongolia University, Hohhot 010021, China.
Sensors (Basel). 2024 Dec 19;24(24):8100. doi: 10.3390/s24248100.
Toxic acetone gas emissions and leakage are a potential threat to the environment and human health. Gas sensors founded on metal oxide semiconductors (MOS) have become an effective strategy for toxic gas detection with their mature process. In the present work, an efficient acetone gas sensor based on Au-modified ZnO porous nanofoam (Au/ZnO) is synthesized by polyvinylpyrrolidone-blowing followed by a calcination method. XRD and XPS spectra were utilized to investigate its structure, while SEM and TEM characterized its morphology. The gas sensitivity of the Au/ZnO sensors was investigated in a static test system. The results reveal that the gas-sensitive performance of porous ZnO toward the acetone can be enhanced by adjusting the loading ratio of noble Au nanoparticles. Specifically, the Au/ZnO sensor prepared by the Au loading ratio of 3.0% (Au/ZnO-3.0%) achieved a 100 ppm acetone gas response of 20.02 at the optimum working temperature of 275 °C. Additionally, a portable electronic device used a STM32 primary control chip to integrate the Au/ZnO-3.0% gas sensor with other modules to achieve the function of detecting and alarming toxic acetone gas. This work is of great significance for efficiently detecting and reducing acetone emissions.
有毒丙酮气体的排放和泄漏对环境和人类健康构成潜在威胁。基于金属氧化物半导体（MOS）的气体传感器因其工艺成熟，已成为检测有毒气体的有效策略。在本工作中，通过聚乙烯吡咯烷酮发泡后煅烧的方法合成了一种基于金修饰的氧化锌多孔纳米泡沫（Au/ZnO）的高效丙酮气体传感器。利用XRD和XPS光谱研究其结构，用SEM和TEM表征其形貌。在静态测试系统中研究了Au/ZnO传感器的气敏性能。结果表明，通过调节贵金属金纳米颗粒的负载比例，可以提高多孔ZnO对丙酮的气敏性能。具体而言，在275℃的最佳工作温度下，金负载比例为3.0%的Au/ZnO传感器（Au/ZnO-3.0%）对100 ppm丙酮气体的响应为20.02。此外，一种便携式电子设备使用STM32主控芯片将Au/ZnO-3.0%气体传感器与其他模块集成，实现了对有毒丙酮气体的检测和报警功能。这项工作对于有效检测和减少丙酮排放具有重要意义。
