Molecular Imprinted BiVO₄ Microswimmers for Selective Target Recognition and Removal

Area of Science:

• Materials Science
• Nanotechnology
• Environmental Science

Background:

• Photoactive semiconductor micro/nanoswimmers mimic photosynthesis for light harvesting and energy conversion.
• Current artificial swimmers lack selectivity and efficient target recognition, limiting their application in pollutant degradation.
• Non-selective photogenerated radicals hinder effective surface analyte binding and overall efficiency.

Purpose of the Study:

• To engineer surface recognition sites onto light-driven bismuth vanadate (BiVO4) microswimmers using molecular imprinting polymerization.
• To enable selective capture and degradation of target molecules in complex mixtures.
• To enhance the motion capabilities and environmental interaction of single-component photocatalytic microswimmers.

Main Methods:

• Surface modification of BiVO4 microswimmers via molecular imprinting polymerization.
• Demonstration of self-propulsion in the presence of target molecules without toxic fuels.
• Selective degradation of target pollutants within a mixture.

Main Results:

• Engineered BiVO4 microswimmers exhibit specific surface recognition sites.
• Modified microswimmers achieve fuel-free self-propulsion and selective pollutant degradation.
• Enhanced motion and capture efficiency in specific chemical environments.

Conclusions:

• Surface engineering with molecular imprinting is a viable strategy for creating selective semiconductor microswimmers.
• This approach overcomes the limitations of non-selective radical behavior in pollutant degradation.
• Optimized microswimmer design offers a promising route for targeted environmental remediation and enhanced propulsion.