Accurate cadmium (II) detection with single crystalline α-Fe₂O₃ nano-hexagonal modified screen-printed carbon...

Area of Science:

• Electrochemistry
• Environmental Science
• Nanotechnology

Background:

• Toxic metals like cadmium pose significant risks to environmental and human health.
• Accurate detection of cadmium ions (Cd(II)) is crucial for effective environmental monitoring.

Purpose of the Study:

• To develop a novel sensor for sensitive Cd(II) detection.
• To utilize single crystalline α-Fe2O3 nano-hexagons for sensor modification.

Main Methods:

• Fabrication of a screen-printed carbon electrode (SPCE) modified with α-Fe2O3 nano-hexagons.
• Electrochemical characterization using voltammetric methods.
• Structural and surface analysis via XRD and microscopy.

Main Results:

• The α-Fe2O3 modified SPCE demonstrated a 7-fold enhanced response to Cd(II) compared to bare SPCE.
• Achieved a linear detection range up to 333.0 µmol/L for Cd(II).
• Established a low detection limit of 0.65 nmol/L for Cd(II).

Conclusions:

• The developed sensor exhibits high sensitivity, practicality, and anti-interference capabilities for Cd(II) detection.
• The sensor shows great potential for real-time environmental monitoring of heavy metals in water.
• The use of α-Fe2O3 nano-hexagons significantly enhances electrochemical sensing performance.