A Novel Voltammetric Sensor Based on Reduced Graphene Oxide‐Platinum Nanohybrid‐modified Electrode for Facile and Effective Determination of 4‐Chlorophenol in Real Water Samples

Abstract

Herein, a facile and enzyme-free CP sensor was fabricated by in situ electrochemical reduction strategy on the surface of glassy carbon electrode (GCE). Reduced graphene oxide (RGO) was chose as supporting materials for the distribution of platinum nanoparticles (Pt NPs) to obtain improved catalytic properties. The applicability and suitability of the obtained RGO-Pt/GCE for 4-CP detection were also evaluated. The results indicated that the RGO-Pt NPs modified electrode displayed much better catalysis and higher sensitivity for 4-CP oxidation. Under optimum conditions, the oxidation peak current was proportional to 4-CP concentration in the range from 0.1 to 500 μM with a detection limit of 51 nM. Meanwhile, it is demonstrated that the prepared sensor is also characterized by excellent feasibility, satisfactory reproducibility, good stability and high specificity. The results suggested that RGO-Pt/GCE could be a facile, costeffective, and rapid tool for the prospect on-line evaluation of 4-CP in drinking water samples.

Tunable construction of electrochemical sensors for chlorophenol detection

“…Two approaches have been adopted to 56 This journal is © The Royal Society of Chemistry 2022 meet this issue. One is the electrochemical reduction of GO to rGO, 58,70,78,122 which can significantly improve the signal response. Another is taking GO as a supporting matrix to disperse and stabilize different active materials such as TiO 2 NPs, 70 poly(bromocresol purple) 84 and V 2 O 5 nanosheets.…”

“…The obtained Ag NPs/rGO/GCE can also help enrich analytes like PCP on the electrode interface, as indicated by the low LOD (1 nM) and wide linear detection range (8 nM–10 μM), which are suited for the direct detection of real samples. Sun et al 122 distributed Pt NPs on rGO via a facile in situ electrochemical reduction method. The fabricated Pt NPs/rGO/GCE exhibited excellent electrocatalytic properties, which amplified the oxidation peak current as well as lowering the oxidation over-potential of 4-CP, both helping to enhance the detection efficiency.…”

Facile Preparation of Ionic Liquid‐coated Copper Nanowire‐modified Carbon Paste Electrode for Electrochemical Detection of Etilefrine Drug

“…6 Therefore, the detection of ET-HCl is essential for clinical applications. 19 To mitigate this problem, surface modification of electrodes by polymers, 20 nanoparticles, 21 organic compounds, 22 surfactants, 23 carbon nanotube, 24 functionalized graphene, 25 Cu oxide NWs 26,27 has been widely studied. Growing the ratio of these deaths were correlated with a prescription drug overdose.…”

“…Nevertheless, the oxidation of ET‐HCl at a traditional CPE and the bare glassy carbon electrode (GCE) suffers from overvoltage and slow kinetics rate . To mitigate this problem, surface modification of electrodes by polymers, nanoparticles, organic compounds, surfactants, carbon nanotube, functionalized graphene, Cu oxide NWs has been widely studied. In addition, copper nanowires (Cu NWs) have enormous significant research attention with the interesting applications in the fabrication of high‐performance catalysts, chemical sensors, nanoelectronics, and solar cells .…”