Nitrogen-oxygen free radical functionalized MOFs (Metal-Organic Frameworks) desulfurizer as well as preparation method and application thereof

The invention belongs to the technical field of environmental protection, and particularly relates to a nitroxide free radical functionalized MOFs (Metal-Organic Frameworks) desulfurizing agent as well as a preparation method and application thereof. Comprising the following steps: dissolving hydrated Co salt and Zn salt in methanol to obtain a solution A, and dissolving an imidazole compound in methanol to obtain a solution B; pouring the solution A into the solution B, stirring, centrifuging, washing and drying to obtain a ZIF product; dispersing the ZIF product into dichloromethane; mixing NIT-Ph-R with dichloromethane, dropwise adding the mixture into the ZIF suspension under violent stirring, stirring and reacting; and washing and drying to obtain the NIT nitroxide free radical functionalized MOFs material. According to the method, the removal capacity of MOF in pollutant pre-enrichment can be improved, the stability is higher, meanwhile, recycling is easy to achieve, and the defects that nitrogen-oxygen