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Au nanoparticle-loaded eggshell for electrochemical detection of nitrite
Qi Ding1,2, Liping Cao2, Minghuan Liu1
1College of Chemical Engineering and Materials Science, Quanzhou Normal University Quanzhou Fujian 362000 China minghuansdjn@126.com yangdp@qztc.edu.cn.
RSC Advances
|April 15, 2022
Summary
This study converts waste eggshells into gold nanoparticle-loaded nanocomposites (Au/CaCO3) for sensitive nitrite detection in oolong tea. This waste-to-value approach offers a low-cost method for eggshell utilization and pollutant sensing.
Area of Science:
- Materials Science
- Environmental Science
- Analytical Chemistry
Background:
- Eggshells represent a significant source of domestic waste with underutilized potential.
- Their unique porous hierarchical structure makes them suitable for developing functional materials.
- Recycling eggshell waste can lead to valuable applications and reduce environmental burden.
Purpose of the Study:
- To develop an economical and eco-friendly method for converting eggshell waste into functional nanocomposites.
- To synthesize gold nanoparticle-loaded eggshell nanocomposites (Au/CaCO3) for analytical applications.
- To evaluate the efficacy of these nanocomposites in detecting trace nitrite in oolong tea.
Main Methods:
- Eggshell waste was processed to create Au/CaCO3 nanocomposites.
- Nanocomposite-modified electrodes were fabricated.
- Electrochemical techniques were employed to detect nitrite concentrations.
Main Results:
- The Au/CaCO3 nanocomposite-based electrodes exhibited significant electrochemical enhancement compared to bare electrodes.
- A wide linear response range for nitrite detection was achieved (0.01 to 1.00 mM).
- A low detection limit of 11.55 nM for nitrite was determined.
Conclusions:
- The developed method offers a practical and cost-effective strategy for eggshell waste valorization.
- Au/CaCO3 nanocomposites provide a novel platform for the sensitive electrochemical detection of nitrite.
- This approach contributes to both waste management and environmental monitoring solutions.
