MOF nano-crystals of ZIF-8 identified as ambient NO2 gas absorbent by using resonant micro-cantilever experiment

摘要

Based on resonant micro-cantilever measurements, the metal-organic framework (MOF) nano-crystal material of ZIF-8 is, for the first time, identified as an excellent absorbent to capture/fix the automobile exhaust of NO2 in real atmospheric air. By using MEMS resonant cantilever as material evaluation tool, the adsorbing properties of ZIF-8 to NO2 gas have been experimentally examined not only for qualitative judgement, but also for thermodynamic-level quantitative evaluation. Such identification can help to real the formation mechanism of NO2 associated PM2.5 particles and acid rain.