Mesoporous Fe₂O₃-TiO₂ Integrated with Plasmonic Ag Nanoparticles for Enhanced Solar H₂ Production.

Area of Science:

• Materials Science
• Nanotechnology
• Photocatalysis

Background:

• Developing efficient photocatalysts is crucial for sustainable energy production.
• Solar hydrogen generation offers a clean alternative fuel source.
• Nanocomposite materials show promise for enhanced photocatalytic activity.

Purpose of the Study:

• To synthesize and characterize mesoporous Fe₂O₃-TiO₂ nanocomposites (TiFe) with varying Ti:Fe ratios.
• To fabricate silver-integrated TiFe nanocomposites (TiFeAg) for improved solar hydrogen generation.
• To investigate the photocatalytic mechanism and performance of TiFeAg under direct sunlight.

Main Methods:

• Sol-gel assisted one-pot synthesis of TiFe nanocomposites.
• Chemical reduction method for Ag integration into TiFe nanocomposites.
• Characterization using HRTEM and other techniques to analyze material properties and photocatalytic performance.

Main Results:

• TiFeAg nanocomposites exhibited enhanced solar hydrogen generation compared to bare TiO₂.
• The TiFeAg-2 thin film (1 wt% Ag-loaded TiFe-4) showed the highest solar H₂ yield (7.64 mmol h⁻¹g⁻¹).
• Schottky and TiO₂-Fe₂O₃ heterojunctions effectively separated charge carriers, boosting hydrogen production.

Conclusions:

• The synthesized TiFeAg nanocomposites are highly effective for solar hydrogen production.
• Synergistic effects between Ag nanoparticles, Fe₂O₃, and TiO₂ enhance photocatalytic activity.
• Optimized TiFeAg materials offer a promising pathway for efficient solar fuel generation.