MXenes@MOFs Hybrid Heterointerfaces for Electrochemical Sensing: Interface Engineering, Progress, Challenges and...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• MXenes offer high conductivity and surface chemistry for sensing.
• Metal-organic frameworks (MOFs) provide large surface areas and tunable pores but suffer from poor conductivity.
• Integrating MXenes and MOFs creates hybrid materials addressing the porosity-conductivity trade-off for electrochemical sensing.

Purpose of the Study:

• To review methods for engineering MXene@MOF hybrids with controlled interfacial structures.
• To highlight the formation of synergized heterojunctions and their sensing mechanisms.
• To summarize the applications of these hybrids in detecting environmental pollutants and health biomarkers.

Main Methods:

• In-situ, ex-situ, and derivative synthesis strategies for MXene@MOF hybrids.
• Engineering interfacial bonding (covalent and non-covalent) and MOF distribution within MXene interlayers.
• Fabrication of heterojunctions to enhance sensing properties.

Main Results:

• MXene@MOF hybrids exhibit enhanced electrochemical sensing performance, including high stability and low signal-to-noise ratio.
• These materials show promise in detecting a wide range of analytes like heavy metal ions, antibiotics, and disease biomarkers.
• Demonstrated superior performance compared to commercial electrodes like Ag/AgCl.

Conclusions:

• MXene@MOF hybrids represent a promising class of materials for advanced electrochemical sensing.
• Further research into interface engineering and understanding sensing mechanisms is crucial.
• These materials hold significant potential for commercialization in environmental monitoring and healthcare diagnostics.