▎ 摘　　要

Widely presented nitrite in drinking water, food and even physiological system endangers human health. Here,bare gold nanoparticles functionalized Zr-based metal-organic framework modified reduced graphene oxide (GNPs/UiO-66-NH2/rGO) nanocomposites were prepared by hydrothermal method. This experiment studies the morphology, composition, structure and electrochemical behavior of the sensor. The experimental results show that the sensor has a peak potential of 0.9 V, the concentration range of NO2- is 5.0 mu M to 768 mu M, the linear regression equation of the calibration curve is I-pa=0.3646+0.00642 C (R-2=0.9998), and the LOD is as low as 3.7 mu M (S/N=3). Therefore, an electrochemical sensor platform for trace detection of NO2- was successfully constructed.