Fabrication of ternary MoS

Area of Science:

• Nanomaterials Science
• Catalysis
• Biosensing

Background:

• Nanomaterials-based enzymatic mimics offer high catalytic activity and stability.
• Developing efficient catalysts is crucial for sensitive detection methods.

Purpose of the Study:

• To synthesize ternary MoS2-PPy-Pd nanotubes.
• To evaluate their peroxidase-like catalytic activity.
• To develop a colorimetric method for l-cysteine detection.

Main Methods:

• Hydrothermal reaction and in situ redox polymerization.
• Synthesis of MoS2-PPy-Pd nanotubes.
• Assessing catalytic activity with 3,3',5,5'-tetramethylbenzidine (TMB) and H2O2.
• Developing a colorimetric assay for l-cysteine detection.

Main Results:

• MoS2-PPy-Pd nanotubes demonstrated superior peroxidase-like activity compared to individual components and binary nanocomposites.
• The catalytic kinetics followed Michaelis-Menten behavior.
• A sensitive colorimetric method for l-cysteine detection was established with a limit of detection of 0.08 μM.
• High selectivity for l-cysteine detection was achieved.

Conclusions:

• Ternary MoS2-PPy-Pd nanotubes exhibit significant synergistic catalytic effects.
• The developed colorimetric strategy offers a rapid and sensitive approach for l-cysteine detection.
• These nanomaterials hold potential for applications in biosensing, environmental monitoring, and medical diagnostics.