Abstract
Theperoxidase-like activity of CdV2O6 nanorods has been considerablyimproved by modification with N, N-dicarboxymethyl perylene-diimide (PDI) as a photosensitizer. The peroxidase-like behaviors are evaluated by virtue of the colorlesschromogenic substrate 3,3',5,5'-tetramethylbenzidine (TMB), which is fast changed into blue oxTMB in the presence of H2O2 inonly 90s. PDI-CdV2O6 exhibits high stability at elevated temperatures and PDI-CdV2O6 retains more than 70% of itscatalytic activity over a wide range of 15 to 60°C. Thecatalytic mechanism of PDI-CdV2O6 is ascribed to the synergistic interaction between PDI and CdV2O6 and the generation of •O2- radicals. Based on the enhanced peroxidase-like activity of PDI-CdV2O6, a selective colorimetric sensor has been constructedfor H2O2 and pyrogallol (PG) with detection limits of 36.5μM and 0.179μM, respectively. Thefeasibility of the proposed sensing platform has been validated by detecting H2O2 in milk and pyrogallol in tap water.
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