State Key Laboratory for Mechanical Behavior of Materials, Shaanxi International Research Center for Soft Matter, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
ACS Sens. 2023 Jul 28;8(7):2471-2492. doi: 10.1021/acssensors.3c00362. Epub 2023 Jun 27.
The demand for monitoring chemical and physical information surrounding, air quality, and disease diagnosis has propelled the development of devices for gas sensing that are capable of translating external stimuli into detectable signals. Metal-organic frameworks (MOFs), possessing particular physiochemical properties with designability in topology, specific surface area, pore size and/or geometry, potential functionalization, and host-guest interactions, reveal excellent development promises for manufacturing a variety of MOF-coated sensing devices for multitudinous applications including gas sensing. The past years have witnessed tremendous progress on the preparation of MOF-coated gas sensors with superior sensing performance, especially high sensitivity and selectivity. Although limited reviews have summarized different transduction mechanisms and applications of MOF-coated sensors, reviews summarizing the latest progress of MOF-coated devices under different working principles would be a good complement. Herein, we summarize the latest advances of several classes of MOF-based devices for gas sensing, i.e., chemiresistive sensors, capacitors, field-effect transistors (FETs) or Kelvin probes (KPs), electrochemical, and quartz crystal microbalance (QCM)-based sensors. The surface chemistry and structural characteristics were carefully associated with the sensing behaviors of relevant MOF-coated sensors. Finally, challenges and future prospects for long-term development and potentially practical application of MOF-coated sensing devices are pointed out.
对监测周围空气质量和疾病诊断的化学和物理信息的需求推动了气体传感设备的发展，这些设备能够将外部刺激转化为可检测的信号。金属-有机骨架（MOFs）具有拓扑结构、比表面积、孔径和/或几何形状、潜在功能化和主客体相互作用等方面的特殊物理化学性质，具有很好的设计性，为制造各种用于包括气体传感在内的多种应用的 MOF 涂层传感设备提供了极好的发展前景。过去几年，在制备具有优异传感性能（尤其是高灵敏度和选择性）的 MOF 涂层气体传感器方面取得了巨大进展。尽管已有综述总结了 MOF 涂层传感器的不同转换机制和应用，但总结不同工作原理下 MOF 涂层器件最新进展的综述将是很好的补充。在此，我们总结了几类基于 MOF 的气体传感设备的最新进展，即电阻式传感器、电容器、场效应晶体管（FET）或 Kelvin 探针（KP）、电化学和基于石英晶体微天平（QCM）的传感器。我们仔细地将表面化学和结构特征与相关 MOF 涂层传感器的传感行为联系起来。最后，指出了 MOF 涂层传感设备长期发展和潜在实际应用所面临的挑战和未来展望。
