White Graphene undergoes Peroxidase Degradation

Area of Science:

• Materials Science
• Biomedical Engineering
• Nanotechnology

Background:

• Hexagonal boron nitride (hBN) nanosheets are advanced 2D materials with diverse applications.
• The biodegradation of hBN is largely unexplored due to its chemical inertness and oxidation resistance.
• Assessing hBN biodegradation is crucial for developing novel biomedical tools and applications.

Purpose of the Study:

• To investigate the biodegradability of hBN nanosheets.
• To compare the efficacy of enzymatic catalysis (horseradish peroxidase (HRP) and human myeloperoxidase (MPO)) and the photo-Fenton (P.F.) reaction in degrading hBN.
• To establish a foundation for designing hBN-based biomedical conjugates.

Main Methods:

• Enzymatic degradation assays using HRP and MPO.
• Degradation assessment via the photo-Fenton (P.F.) reaction.
• Comparative analysis of hBN degradation kinetics and mechanisms.

Main Results:

• Human myeloperoxidase (MPO) induced partial oxidation of hBN nanosheets within 35 hours.
• Horseradish peroxidase (HRP) showed negligible degradation of hBN even after 60 days.
• The photo-Fenton (P.F.) reaction resulted in nearly complete oxidation/degradation of hBN within 100 hours.

Conclusions:

• Biodegradation of hBN differs significantly from graphene-based materials.
• MPO and P.F. reaction show potential for hBN degradation, with P.F. being highly effective.
• These findings are vital for the future design of hBN-based advanced conjugates for biomedical applications.