Self-assembled bacterial cellulose-based photo-enzyme coupled system enabled by visible light-driven for efficient...

Area of Science:

• Materials Science
• Environmental Science
• Biotechnology

Background:

• Developing efficient methods for dye degradation is crucial for wastewater treatment.
• Biomass-derived materials offer sustainable platforms for catalytic systems.
• Integrating photocatalysts and enzymes can enhance degradation efficiency.

Purpose of the Study:

• To develop a visible light-driven photo-enzyme coupled system for efficient dye degradation.
• To utilize bacterial cellulose (BC) as a support for graphitic carbon nitride (g-C3N4) and laccase immobilization.
• To investigate the synergistic effects of photocatalysis and enzymatic activity.

Main Methods:

• Assembling g-C3N4 during in situ culture on bacterial cellulose (BC).
• Immobilizing laccase using a metal-organic framework (MOF) on the g-C3N4/BC composite.
• Evaluating the degradation efficiency of methylene blue and rhodamine B under visible light irradiation.

Main Results:

• The composite system achieved 100% degradation of methylene blue and 96.1% of rhodamine B within 10 minutes.
• The system exhibited excellent reusability, with over 10 cycles of degradation.
• Electron transfer from photocatalysis to the enzyme reduced photogenerated electron-hole recombination, enhancing catalytic efficiency.

Conclusions:

• The developed biomass photo-enzyme coupled system is highly effective for rapid dye degradation.
• The integration of BC, g-C3N4, and MOF-encapsulated laccase provides a stable and reusable catalytic platform.
• This research offers a promising approach for advanced wastewater treatment technologies.