Electronic and Atomic Structural Properties Associated with Enhanced Photodegradation Activity in Mo-Doped TiO₂...

Area of Science:

• Materials Science
• Environmental Science
• Nanotechnology

Background:

• Titania nanoparticles (TiO2) are widely used as photocatalysts.
• Enhancing TiO2 efficiency for environmental remediation remains a key challenge.
• Doping is a strategy to improve photocatalytic performance.

Purpose of the Study:

• To investigate the efficacy and structural evolution of Molybdenum-doped titania nanoparticles (MTNPs).
• To understand the role of Mo doping in the photocatalytic degradation of methyl blue (MB).
• To elucidate the structural and electronic mechanisms behind enhanced photodegradation.

Main Methods:

• X-ray absorption spectroscopy (XAS) was employed to study MTNPs.
• Characterization included analysis of structural variations and symmetry.
• In situ XAS monitored electronic changes during photocatalysis.

Main Results:

• 3 wt % MTNP exhibited uniform size, anatase structure, and higher degradation efficiency.
• Spectral analyses revealed structural changes in TiO6 octahedra and C4v symmetry active sites.
• Mo doping enhanced hole carriers, facilitated charge transfer to Mo 4d orbitals, and reduced electron-hole recombination.

Conclusions:

• Mo doping significantly enhances the photocatalytic performance of TiO2 nanoparticles.
• Optimized electronic structure and reduced recombination are key to improved degradation.
• MTNPs show promise as sustainable materials for environmental remediation.