MoS₂ modified screen printed carbon electrode based flexible sensor for detection of Copper

Abstract

Monitoring of heavy metal ions in aquatic environment can be a tedious process, especially in harsh, logistically challenging field conditions. This work demonstrates the detection of copper ions in water using a low-cost screen printed 2D molybdenum disulfide (MoS2) nanoparticle based electrochemical sensor. To deal with the common field-testing challenges, an easily disposable, flexible, compact sized reliable sensor was fabricated using a screen-printing technique. The developed sensor shows an excellent performance with a linear range of 5 µM to 1000 µM, a low limits of detection (LOD) value of just 0.3125 µM, and high repeatability with standard deviation less than 0.5%. With this performance and attractive attributes such as flexible form factor, low-cost fabrication and disposability etc. the presented sensor shows a great potential for practical applications in soil and water monitoring.

Electrochemical Detection of Fe2+ ions in Water using 2-Dimensional g-C3N4 modified Glassy Carbon Electrode-based Sensor

“…However, at higher concentrations of iron analyte detection, a diffusion-controlled mechanism plays a major role, which was confirmed by plotting Log V against Log Ip. Here the slope was found to be 0.55 which was closer to the ideal diffusion-controlled mechanism (0.5) [9].…”

MoS₂ Modified Screen Printed Carbon Electrode Based Flexible Electrochemical Sensor for Detection of Copper Ions in Water

“…This paper also extends our initial work presented at IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS) 2022 [40]. In this extended work, we have analyzed the electrochemical behavior of both the modified glassy carbon electrode (GCE) and the screen-printed carbon electrode (SPCE) using electrochemical impedance spectroscopy (EIS) techniques.…”

Two-Dimensional Non-Carbon Materials-Based Electrochemical Printed Sensors: An Updated Review

“…Furthermore, the sensor showed a good mean relative standard deviation (RSD) value, capable of real sample analysis. In a separate study, Neethipathi et al proposed a MoS 2 /SPE for heavy metal ions copper (Cu 2+ ) detection [ 112 ]. The electrochemical electrode was printed using carbon paste by Screen Stencil Printer C920 (AUREL Automation) on flexible polyvinyl chloride (PVC) substrate.…”