2D bimetallic Ni/Fe MOF nanosheet composites as a peroxidase-like nanozyme for colorimetric assay of multiple targets

2D Ni/Fe MOF nanosheet was prepared by a simple two-step ultrasound strategy. Its peroxidase-like activity is 14 and 3 times that of the Ni-MOF and Fe-MOF due to nanosheet structure of Ni-MOF and dispersion of Fe MOF with unsaturated metal sites.