Minimizing the Efficiency Loss in Thin Films Using the Biopolymeric Complexation Approach for Advanced Aqueous Phase...

Area of Science:

• Materials Science
• Environmental Chemistry
• Nanotechnology

Background:

• Photocatalytic thin films suffer efficiency loss due to limited catalyst surface exposure.
• Developing strategies to maintain high photocatalytic activity in immobilized systems is crucial.

Purpose of the Study:

• To design and investigate a chitosan/cellulose (CN/CL) hybrid surface for restoring photocatalytic efficiency in thin films.
• To understand the mechanism behind efficiency restoration using biopolymeric complexation.

Main Methods:

• Fabrication of CN/CL hybrid immobilizing surfaces.
• Characterization of surface properties and interactions using DFT studies.
• Testing photocatalytic efficiency with a model cationic pollutant (tetracycline hydrochloride).

Main Results:

• The CN/CL complexation resulted in intense negative surface charging, enhancing adsorption of cationic pollutants.
• Photocatalytic efficiency was preserved at 95% for immobilized ZnO-CuO on CN/CL films.
• Bare CN films showed a significant efficiency drop to 64%, highlighting the importance of CN/CL complexation.

Conclusions:

• The CN/CL hybrid surface effectively restores photocatalytic efficiency by enhancing pollutant adsorption, counteracting reduced surface area.
• Biopolymeric complexation is a viable strategy for improving the performance of photocatalytic thin films.
• The developed approach shows promise for treating complex pollutant systems.