Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
Frontier Institute of Chip and System, Fudan University, Shanghai 200438, China.
Int J Environ Res Public Health. 2023 Mar 1;20(5):4388. doi: 10.3390/ijerph20054388.
The emission of harmful gases has seriously exceeded relative standards with the rapid development of modern industry, which has shown various negative impacts on human health and the natural environment. Recently, metal-organic frameworks (MOFs)-based materials have been widely used as chemiresistive gas sensing materials for the sensitive detection and monitoring of harmful gases such as NO, HS, and many volatile organic compounds (VOCs). In particular, the derivatives of MOFs, which are usually semiconducting metal oxides and oxide-carbon composites, hold great potential to prompt the surface reactions with analytes and thus output amplified resistance changing signals of the chemiresistors, due to their high specific surface areas, versatile structural tunability, diversified surface architectures, as well as their superior selectivity. In this review, we introduce the recent progress in applying sophisticated MOFs-derived materials for chemiresistive gas sensors, with specific emphasis placed on the synthesis and structural regulation of the MOF derivatives, and the promoted surface reaction mechanisms between MOF derivatives and gas analytes. Furthermore, the practical application of MOF derivatives for chemiresistive sensing of NO, HS, and typical VOCs (e.g., acetone and ethanol) has been discussed in detail.
随着现代工业的快速发展，有害气体的排放已经严重超过了相关标准，这对人类健康和自然环境都产生了各种负面影响。最近，金属有机骨架（MOF）基材料已被广泛用作电阻式气敏材料，用于对有害气体（如 NO、HS 和许多挥发性有机化合物（VOCs））进行灵敏检测和监测。特别是 MOF 的衍生物，通常是半导体金属氧化物和氧化物-碳复合材料，由于其具有高比表面积、结构可调性多样、表面结构多样化以及优异的选择性，有望促进与分析物的表面反应，从而输出放大的电阻变化信号。在本文中，我们介绍了用于电阻式气敏传感器的复杂 MOF 衍生材料的最新进展，重点介绍了 MOF 衍生物的合成和结构调控，以及 MOF 衍生物与气体分析物之间促进的表面反应机制。此外，还详细讨论了 MOF 衍生物在 NO、HS 和典型 VOC（如丙酮和乙醇）的电阻式传感方面的实际应用。
