Electrochemical Probe of the Reduced Graphene Oxide Modified by Bare Gold Nanoparticles Functionalized Zr(IV)‐based Metal‐organic Framework for Detecting Nitrite
Jing Chen, Shuying Li, Fanghong Xu, Qian Zhang
Abstract
Abstract 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‐NH 2 /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 NO 2 − is 5.0 μM to 768 μM, 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 μM (S/N=3). Therefore, an electrochemical sensor platform for trace detection of NO 2 − was successfully constructed.