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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 mesoporous silica-SBA-15(IM-MNC)and it was used as a type of green heterogeneous catalyst to generate active radicals from H2O2 decomposition for the oxidative degradation of malachite green(MG)in aqueous solution.