VOCs传感器敏感膜材料及敏感机理研究进展

Research progress in sensitive membrane materials and adsorption mechanism of VOCs sensors

在有机挥发性气体(volatile organic compounds,VOCs)传感器中,对VOCs产生选择性吸附作用的敏感膜是至关重要的部分,传感器的响应效能取决于敏感膜的材料和制备方法。本文总结了用于VOCs传感器的有机聚合物材料、无机纳米材料、超分子材料和复合材料等不同结构类型的敏感膜材料,通过分析其化学组成、制备方法及结构特征,探讨并比较VOCs在各种敏感膜材料上的吸附性能及相互作用机制,特别介绍了近年发展起来的金属有机框架(metal-organic frameworks,MOFs)材料在VOCs传感器中的应用及敏感机理。最后对敏感膜材料在VOCs传感器研发中面临的挑战及发展趋势进行了讨论和展望,包括传感器的灵敏度、交叉响应、寿命等性能问题,研发孔隙率高、比表面积大的敏感材料将有望解决这些挑战。

Sensitive membranes that selectively adsorb VOCs(volatile organic compounds)are the key components of VOCs sensors,and sensors’response performance depends on membranes materials and preparation methods.The chemical composition,preparation methods and structural characteristics of sensing membranes materials of VOCs sensors were reviewed,including polymers,inorganics,supermolecules and composite materials,adsorption properties and mechanism of sensitive membrane materials for VOCs were compared and analyzed,especially the recent development of new material-metal-organic frameworks(MOFs)used in VOCs sensors.Finally,challenges and perspectives of sensitive membrane materials in VOCs sensors were also discussed and forecasted,including performance issues of sensors such as sensitivity,cross-response,lifetime,and research of sensitive materials with high porosity and large specific surface area is expected to solve these challenges.