A colorimetric and electrochemical dual-mode Hg sensor utilizing oxidase-like activity arising from the combination of Hg and palladium metal-organic framework@graphene.

Developing convenient and reliable methods for Hg monitoring is highly important. Some precious metal nanomaterials with intriguing peroxidase-like activity have been used for highly sensitive Hg detection. However, HO must be added during these detections, which impedes practical applications of Hg sensors due to its susceptible decomposition by environmental factors.