AI Article Synopsis
- - Pore size is crucial for how well metal-organic frameworks (MOFs) perform in applications like catalysis, gas storage, and sensing, but understanding the relationship between pore size and properties is difficult due to a lack of ideal models.
- - A new method called solvent-coordination directed structure swelling helps adjust the pore sizes in a MOF called MIL-88B, enabling a detailed study of gas sensitivity and selectivity based on pore size.
- - The MIL-88B-20% variant demonstrated exceptional performance in hydrogen sulfide sensing, showcasing the potential of this method for developing effective gas-sensing materials while advancing the study of pore-size/property relationships.
Article Abstract
Pore size plays a critical role in determining the performance of metal-organic frameworks (MOFs) in catalysis, sensing, and gas storage or separation. However, revealing the pore-size/property relationship remains extremely challenging because ideal structure models possessing different pore sizes but having the same components are lacking. In this work, a solvent-coordination directed structure swelling method was developed for modulating the ratio between the large and narrow pore phases of a flexible MOF, MIL-88B. Pore-size-dependent gas sensitivity and selectivity were studied for the first time in the MIL-88B samples. The optimized MIL-88B-20 % sample showed one of the best sensing performances among all the reported MOF-based H S-sensing materials. This work not only provides a method to synthesize ideal structure models for revealing the relationship between pore-size and properties, but also may inspire the development of high-performance gas sensing materials.
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| http://dx.doi.org/10.1002/anie.202302996 | DOI Listing |
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