Applications of Metal-Organic Frameworks and Their Derived Metal Oxides in Resistive Gas Sensors

Highly sensitive and selective gas sensors are of great significance for real-time monitoring of toxic and harmful gases in the air and early diagnosis of diseases. At present, there are still many problems to be solved urgently for traditional gas-sensing materials. For example, the selectivity is poor and the detection limit, as well as the service life, is insufficient. Metal-organic frameworks (MOFs), as a kind of porous coordination polymers, have been widely used in the field of gas sensors due to their ultra-high specific surface areas and large porosities. MOFs and their derived metal oxides with different nanostructures can improve the sensitivity and selectivity of gas sensors. This provides new ideas and directions for preparing new high-performance gas sensors. Combining the gas sensing mechanism of metal oxide semiconductors (MOS), this article reviews the research progress of MOFs with different nanostructures and their derived metal oxides in the field of resistive gas sensors and prospects their applications and development directions.