Nitrate Electrochemical Sensor Comprising Silver Nanoparticles Carbon Nanotubes Composite

Md Rabiul Islam, Tennessee State University


The cost-effectiveness, functionality, and ease of use of the nanomaterial-enabled electrochemical sensors make them ideal for routine, on-site detection of the nitrate ions (NO3-) in a variety of environmental samples. The excellent developments and adaptable characteristics of the nanomaterials have significantly increased the analytical functioning of the electrochemical nitrate (NO3-) sensors. Nitrate detection would go a long way toward aiding in the management and control of such ions and their devastating effects on air pollution. Additionally, the detection of nitrate ions (NO3-) in an aqueous solution is significantly complicated by the variable quantity and signal overlap with other ions. The objective of this research was to detect nitrate ions using glassy carbon electrodes modified with silver nanoparticles carbon nanotubes composite and outer layer: chitosan. Glassy carbon electrodes/carbon nanotubes/Silver nanoparticles/chitosan electrodes (GCE/MWCNT/AgNPs/CS) were constructed and used to detect nitrate ions. GCE/MWCNT/AgNPs/CS sensor has demonstrated a lower detection limit and higher sensitivity (~30 mA/Μ) fhe nitrate detection (NO3-) when compared with the glassy carbon electrodes alone. Under optimal experimental conditions, the fabricated sensor (GCE/MWCNT/AgNPs/CS) exhibited a LOD of ~8 μM with a correlation coefficient of 0.99 and a greater linear range of 0 – 900 μM.

Subject Area


Recommended Citation

Md Rabiul Islam, "Nitrate Electrochemical Sensor Comprising Silver Nanoparticles Carbon Nanotubes Composite" (2022). ETD Collection for Tennessee State University. Paper AAI29992867.