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Urchin-like PtNPs@Bi2S3: synthesis and application in electrochemical biosensor
Feng Shi1, Jiayin Li1, Jiaxiang Xiao1
1School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, PR China. zjyang@yzu.edu.cn.
The Analyst
|January 17, 2022
Summary
Researchers developed an efficient electrochemical glucose biosensor using platinum nanoparticles on bismuth sulfide nanostructures. This novel PtNPs@Bi2S3 composite offers high sensitivity and stability for glucose monitoring in human serum.
Area of Science:
- Materials Science
- Nanotechnology
- Electrochemistry
Background:
- Developing advanced nanomaterials for biosensing applications is crucial.
- Bismuth sulfide (Bi2S3) nanostructures offer unique electronic properties.
- Platinum nanoparticles (PtNPs) are known for their catalytic activity.
Purpose of the Study:
- To synthesize urchin-like PtNPs@Bi2S3 composite materials.
- To fabricate a novel electrochemical glucose biosensor using this composite.
- To evaluate the performance of the biosensor for glucose detection.
Main Methods:
- Composite soft template synthesis of urchin-like Bi2S3.
- Microwave-assisted growth of PtNPs onto Bi2S3.
- Immobilization of glucose oxidase (GOx) on PtNPs@Bi2S3.
- Characterization using SEM, EIS, FTIR, and CV.
Main Results:
- PtNPs@Bi2S3 composite exhibits a large surface area and enhanced conductivity.
- The biosensor demonstrates high sensitivity with a wide linear range (0.003–0.1 mM and 0.1–1.9 mM).
- The biosensor shows excellent stability, selectivity, and repeatability.
Conclusions:
- The PtNPs@Bi2S3 composite is an effective matrix for immobilizing GOx.
- The synergistic effect of PtNPs and Bi2S3 enhances biosensor performance.
- This biosensor shows potential for practical glucose monitoring in human serum and developing other biosensors.
