Heterogeneous Catalysts Based on Chemically Modified Graphene Films

摘要

heterogeneous catalysts based on chemically modified graphene films. heterogeneous catalysts based on chemically modified graphene films. This patent claims the invention of catalysts based on thin films of covalently modified graphene oxide with specific functional groups cysteamine and imidazole for the degradation of organophosphates (specifically phosphate esters such as dipnpp and paraoxon). The synthesis of these materials occurred through two routes based on the interfacial method, through an interfacial functionalization and the direct functionalization of the graphene oxide film deposited on the substrate of interest. The methodology is capable of producing homogeneously distributed films on the substrate of interest, easy to wash and handle during the catalysis process. The films produced and applied as catalysts for the degradation of the dipnpp and paraoxon organophosphates showed catalytic increments (kcat / h20) of the order of 106-107 times, being the largest reported so far for the degradation of phosphate esters. In addition, these catalysts have been recycled consecutively without losing activity, with the advantage of easy washing and handling.