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In this paper,1-propyl-1,3,5,8,12-pentaazacyclo-tetradecane nickel(Ⅱ)chloride complexes(MNC)was immobilized on the surface of magnetical modified silica(Fe3O4@nSiO2)and it(labeled as IM-MNC)was used as a type of green heterogeneous Fenton-like catalyst for the degradation of malachite green(MG)in aqueous solution.