Amplified Electrochemical Hydrogen Peroxide Sensing Based on Cu-Porphyrin Metal–Organic Framework Nanofilm and G-Quadruplex-Hemin DNAzyme

), respectively, and the detection limit was 0.03 μM. In addition, the sensor shows good selectivity. In summary, this study provides a simple and effective new strategy for electrochemical sensing based on two-dimensional MOFs and artificial enzymes.