Lee Jae-Hyoung, Nguyen Thanh-Binh, Nguyen Duy-Khoi, Kim Jae-Hun, Kim Jin-Young, Phan Bach Thang, Kim Sang Sub
Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea.
Faculty of Chemistry, Ho Chi Minh City University of Education, Ho Chi Minh City 721337, Vietnam.
Sensors (Basel). 2019 Jul 29;19(15):3323. doi: 10.3390/s19153323.
The gas sensing properties of two novel series of Mg-incorporated metal-organic frameworks (MOFs), termed Mg-MOFs-I and -II, were assessed. The synthesized iso-reticular type Mg-MOFs exhibited good crystallinity, high thermal stability, needle-shape morphology and high surface area (up to 2900 m·g), which are promising for gas sensing applications. Gas-sensing studies of gas sensors fabricated from Mg-MOFs-II revealed better sensing performance, in terms of the sensor dynamics and sensor response, at an optimal operating temperature of 200 °C. The MOF gas sensor with a larger pore size and volume showed shorter response and recovery times, demonstrating the importance of the pore size and volume on the kinetic properties of MOF-based gas sensors. The gas-sensing results obtained in this study highlight the potential of Mg-MOFs gas sensors for the practical monitoring of toxic gases in a range of environments.
评估了两个新型含镁金属有机框架（MOF）系列（称为Mg-MOFs-I和-II）的气敏特性。合成的同构型Mg-MOF表现出良好的结晶度、高热稳定性、针状形态和高表面积（高达2900 m·g），这使其在气敏应用方面具有潜力。对由Mg-MOFs-II制成的气体传感器进行的气敏研究表明，在200°C的最佳工作温度下，就传感器动力学和传感器响应而言，其具有更好的传感性能。具有较大孔径和体积的MOF气体传感器显示出更短的响应和恢复时间，这表明孔径和体积对基于MOF的气体传感器的动力学特性很重要。本研究获得的气敏结果突出了Mg-MOFs气体传感器在一系列环境中实际监测有毒气体的潜力。
