Colorimetric detection of Hg(ii) based on the gold amalgam-triggered reductase mimetic activity in aqueous solution by employing AuNP@MOF nanoparticles

AuNPs@MOF was constructed by immobilization of Au NPs uniformly on the cavity of MOF, which can prevent Au NPs aggregation then achieve higher enzymatic activities for detection of Hg²⁺ on the base of Hg²⁺ triggered Au catalysis of MB reduction.