Electrochemical Sensor Based on Platinum Nanoparticles Modified Graphite-Like Carbon Nitride for Detection of Phenol

In this work, platinum nanoparticles were modified on graphite-like carbon nitride (g-C₃N₄) surface via a simple one-pot deposition reduction method, and the prepared Pt/g-C₃N₄ was used as electrode materials for phenol sensing. The morphology and crystallographic structure of Pt/g-C₃N₄ were characterized by Scanning transmission electron microscope (STEM) and X-ray diffraction (XRD). The electrochemical performance of Pt/g-C₃N₄ toward phenol was investigated in details and the results showed that the Pt/g-C₃N₄ sensor had favorable sensing ability for phenol detection. Under the optimum parameters, the electrochemical sensor had a wide range of 2 to 20 µM, lower detection limits of 0.667 µM (S/N═3), and higher sensitivity of 1.21084 mA µM^-1 in phenol detection, indicating the excellent capability of the newly developed sensor to determine phenol. Moreover, the design of the Pt/g-C₃N₄ sensor may provide a potential material for actual application in phenol detection due to its merits of simplicity, reliability, sensitivity and low-cost.