Superparamagnetic Fe3O4 nanoparticles-carbon nitride nanotube hybrids for highly efficient peroxidase mimetic catalystsElectronic supplementary information (ESI) available. See DOI: 10.1039/c1cc15725f

We report a facile route to synthesize size tunable Fe 3 O 4 nanoparticles (NPs)-carbon nitride nanotube (CNNT) hybrids. These hybrids showing the water-soluble property are proven to exhibit ultra high peroxidase mimetic activity compared to those of pure NPs, where a colorless peroxidase substrate 3,3,5,5-tetramethylbenzidine changes by H 2 O 2 to its blue colored oxidized state. Fe 3 O 4 NPs-CNNT hybrids show an ultra high peroxidase mimetic activity compared to pure Fe 3 O 4 NPs.