Synthesis and Peroxidase‐Like Activity of Cobalt@Carbon‐Dots Hybrid Material

Abstract A cobalt@carbon‐dots (Co@C‐dots) hybrid material is successfully prepared and well characterized. The hybrid material exhibits intrinsic peroxidase‐like activity and can be utilized for the degradation of methylene blue; it shows enhanced catalytic activities compared with bare Co nanoparticles or C‐dots. The good catalytic performance of the hybrid material may be attributed to synergistic effects between the Co nanoparticles and C‐dots. Furthermore, the catalytic mechanism of the Co@C‐dots hybrid material is also studied by using steady‐state and time‐resolved fluorometric analysis, which reveals that Co@C‐dots can effectively decompose H 2 O 2 to produce reactive hydroxyl radicals ( . OH). These results suggest that the Co@C‐dots hybrid material could be a promising material applied for biochemical analysis and water treatment.