| Autor: |
Liu Z; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., Lv H; Qingdao Engineering Research Center for New Metallic Functional Materials, Qingdao Binhai University, Qingdao, Shandong 266555, China., Zhang Y; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., He JW; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., Han L; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., Li S; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., Yang L; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China., Xu Y; Department of Chemistry, College of Sciences, Northeastern University, Shenyang, Liaoning 110819, China.; Foshan Graduate School of Innovation, Northeastern University, Foshan, Guangdong 528311, China. |
| Abstrakt: |
Limited by insufficient active sites and restricted mechanical strength, designing reliable and wearable gas sensors with high activity and ductility remains a challenge for detecting hazardous gases. In this work, a thermally induced and solvent-assisted oxyanion etching strategy was implemented for selective pore opening in a rigid microporous Cu-based metal-organic framework (referred to as CuM). A conductive CuM/MXene aerogel was then self-assembled through cooperative hydrogen bonding interactions between the carbonyl oxygen atom in PVP grafted on the surface of defect-rich Cu-BTC and the surface functional hydroxyl group on MXene. A flexible NO 2 sensing performance using the CuM/MXene aerogel hybridized sodium alginate hydrogel is finally achieved, demonstrating extraordinary sensitivity ( S = 52.47 toward 50 ppm of NO 2 ), good selectivity, and rapid response/recovery time (0.9/4.5 s) at room temperature. Compared with commercial sensors, the relative error is less than 7.7%, thereby exhibiting significant potential for application in monitoring toxic and harmful gases. This work not only provides insights for guiding rational synthesis of ideal structure models from MOF composites but also inspires the development of high-performance flexible gas sensors for potential multiscenario applications. |
