Bismuth nanoparticles integration into heavy metal electrochemical stripping sensor

Area of Science:

• Nanotechnology
• Electrochemistry
• Environmental Science

Background:

• Bismuth nanoparticles (BiNPs) are utilized as pre-concentrators for heavy metal detection.
• BiNPs serve as working electrode modifiers in electrochemical stripping analysis.

Purpose of the Study:

• To control the shape and size of BiNPs, including nanocubes, nanospheres, and triangular nanostructures.
• To optimize the synthesis of BiNPs using the polyol method.
• To evaluate the performance of BiNPs in heavy metal sensing and their application in real samples.

Main Methods:

• Synthesis of BiNPs using the polyol method.
• Investigation of different reducing agents (ethylene glycol, sodium hypophosphite) and stabilizers (polyvinyl pyrrolidone, PVP).
• Modification of screen-printed carbon electrodes with synthesized BiNPs.

Main Results:

• Achieved easy control over BiNP shape and size.
• Demonstrated enhanced detection sensitivity for heavy metals using BiNP-modified electrodes.
• Validated the applicability of the developed device in real seawater samples.

Conclusions:

• Optimized BiNP synthesis allows for controlled nanoparticle morphology.
• BiNP-modified electrodes show high efficiency for heavy metal detection.
• The developed method is suitable for analyzing heavy metals in real environmental samples.