Natural enzymes are applied in many fields due to their high catalytic efficiency and strong substrate specificity. However, they have disadvantage of inactivation, high preparing cost, demanding storage conditions. These factors limit their applications. Thus, the development of natural enzymes mimetic that possessing superior stability and catalytic activity is becoming one of the significant research fields which draws more public attention. Since Fe3O4 magnetic nanoparticles (MNPs) were reported to poss...