In-Situ Stabilizing Nano-Ag onto Nonwoven Fabrics via a Mussel-Inspired Approach for Continuous-Flow Catalysis Reduction of Organic Dyes

摘要

A novel nonwoven-fabric-supported-nano-Ag(NWF/Ag)reactor was obtained via a mussel-inspired in-situ fabrication method.The resulting NWF/Ag features a high catalytic activity for the reduction reaction of organic dyes in the presence of sodium borohydride.More importantly,it is also feasible for the scaleup catalysis in NWF/Ag-assembled continuous-flow reactors.Such a NWF/Ag catalyst preserves the fiber-based three-dimensional architecture to effectively drive the continuous-flow catalysis reactions at unprecedented efficiency,benefiting from it the easy diffusion of dye molecules to access the active catalytic sites of nano-Ag.Moreover,the resulting NWF/Ag composites can serve as versatile platforms to assemble continuous-flow reactors in different shapes,sizes,and configurations to extend the catalysis applications.In this study,the catalytic reduction conversion of methylene blue can reach more than 98% in 270 seconds using the NWF/Ag-based channel-type continuous-flow reactor.It also preserves good catalytic reduction performance to other organic dyes,including methyl orange and acid orange 7.The NWF-based platforms,combined with a rational designed approach of surface functionalization and hybridization,probably provide new insights into the catalytic reduction of organic dyes in a continuous-flow way.