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Valence-engineering modulation of MoS2 clusters for enhancing biocatalytic activity
Xiaoyan Xue1, Meili Guo1, Hao Zhang2
1Department of Physics, School of Science, Tianjin Chengjian University, Tianjin 300384, China. meiliguo314@163.com.
Nanoscale
|December 24, 2024
Summary
Cerium-doped Molybdenum Disulfide (Ce-MoS2) clusters show enhanced antioxidant and enzyme-like activities. This valence engineering approach significantly boosts biocatalytic potential for biomedical applications, particularly in treating inflammatory diseases.
Area of Science:
- Materials Science
- Biochemistry
- Nanotechnology
Background:
- Molybdenum disulfide (MoS2) possesses desirable properties like stability and tunable bandgap.
- Current research indicates limited investigation into MoS2's biocatalytic activity for biomedical use.
Purpose of the Study:
- To develop ultra-small, water-soluble MoS2 clusters with enhanced biocatalytic activity.
- To investigate the effect of cerium (Ce) doping on MoS2 cluster properties.
Main Methods:
- Valence-engineering modulation of MoS2 clusters using Ce doping.
- Comparative analysis of antioxidant and superoxide dismutase (SOD)-like activities.
- Evaluation of reactive oxygen and nitrogen species (RONS) clearance.
Main Results:
- Ce-doped MoS2 clusters exhibited ~1.7-fold higher antioxidant activity than undoped clusters.
- Superoxide dismutase (SOD)-like activity was approximately 30-fold higher in Ce-MoS2 clusters.
- Ce-MoS2 clusters demonstrated superior clearance of reactive oxygen and nitrogen species (RONS), especially hydroxyl radical (˙OH) and superoxide radical (O2˙⁻).
Conclusions:
- Ce doping via valence and energy-level engineering significantly enhances the biocatalytic activity of MoS2 clusters.
- This provides a universal strategy for improving MoS2 biocatalysis for biomedical applications.
- Ce-MoS2 clusters show promise for treating inflammatory diseases.
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