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Published on: July 22, 2013
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Hierarchical microtubes constructed using Fe-doped MoS2 nanosheets for biosensing applications.
Zhiwen Shen1, Suping Han2, Jingli Xu1
1College of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai 201620, China. zhangmin@sues.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|September 26, 2022
Summary
Fe-doped MoS2 microtubes were synthesized using a self-sacrificing template method. These microtubes exhibit enhanced peroxidase-like activity for detecting hydrogen peroxide and glutathione.
Area of Science:
- Materials Science
- Nanotechnology
- Catalysis
Background:
- Molybdenum disulfide (MoS2)-based composites show promise in enzyme-like catalysis.
- Synergistic effects from structural design can enhance catalytic performance.
- Developing efficient MoS2-based catalysts requires integrating electronic modulation and structural design.
Purpose of the Study:
- To design one-dimensional (1D) Fe-MoS2 microtubes for enhanced enzyme-like catalysis.
- To investigate the synergistic effects of Fe-doped MoS2 nanosheets and tubular structures.
- To develop a colorimetric assay for detecting hydrogen peroxide (H2O2) and glutathione (GSH).
Main Methods:
- Synthesized tubular Fe-doped MoS2 composites using MoO3 microrods as self-sacrificing precursors.
- Utilized ammonia released during sulfidation to create the tubular structure.
- Evaluated catalytic activity in peroxidase-like reactions and developed colorimetric assays.
Main Results:
- Fe-MoS2 microtubes exhibited superior peroxidase-like catalytic activity compared to other components.
- The catalytic mechanism involves the generation of the hydroxyl radical (˙OH).
- Developed a sensitive colorimetric assay for H2O2 (LOD 0.51 μM) and GSH (LOD 0.12 μM).
Conclusions:
- The 1D Fe-MoS2 microtubes effectively integrate electronic modulation and structural design for enhanced catalysis.
- The facile synthetic strategy provides an efficient MoS2-based functional catalyst.
- The developed colorimetric method offers a simple, selective, and sensitive approach for H2O2 and GSH detection.
