β-Cyclodextrin/CMK-8-Based Electrochemical Sensor for Sensitive Detection of Cu²

Area of Science:

• Materials Science
• Electrochemistry
• Environmental Science

Background:

• Copper ions (Cu²⁺) are significant environmental pollutants. Electrochemical sensors offer a sensitive detection method.
• Mesoporous carbon (CMK-8) provides a high surface area for material modification. β-cyclodextrin (β-CD) can enhance selectivity through molecular recognition.

Purpose of the Study:

• To synthesize and characterize a β-cyclodextrin (β-CD)/mesoporous carbon (CMK-8) nanocomposite.
• To utilize the β-CD/CMK-8 nanocomposite as an electrochemical sensing platform for Cu²⁺ detection.
• To evaluate the sensitivity, selectivity, and reliability of the developed sensor for Cu²⁺ analysis.

Main Methods:

• Synthesis of β-cyclodextrin (β-CD)/mesoporous carbon (CMK-8) nanocomposite.
• Characterization using scanning electron microscopy (SEM) and X-ray diffraction (XRD).
• Electrochemical analysis including electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV).

Main Results:

• The β-CD/CMK-8 nanocomposite exhibited a fast electron transfer rate and large effective surface area.
• The composite showed a high enrichment ability for Cu²⁺ ions.
• The modified electrode demonstrated a wide linear response (0.1 ng·L^-1 to 1.0 mg·L^-1) with a low detection limit (0.3 ng·L^-1).

Conclusions:

• The β-CD/CMK-8 nanocomposite serves as an effective electrochemical sensing platform for Cu²⁺.
• The sensor exhibits excellent sensitivity, selectivity, repeatability, and reproducibility.
• This method provides a simple, sensitive, and reliable approach for Cu²⁺ detection in real samples.