The Need

Current photocatalytic technologies often require UV light for activation, limiting their efficiency and applicability under natural sunlight. Additionally, the short lifespan of photogenerated electrons and holes in TiO₂ nanoparticles hinders effective utilization. There is a need for a self-supported nanostructure that can efficiently harness visible light and be easily recovered for use in environmental remediation and energy production.

The Technology

OSU researchers have developed 3D, self-supported TiO₂ nanomats using blend electrospinning. Cu-doping of the nanomats shifts the absorption edge to the visible spectrum, enhancing photocatalytic properties by narrowing the bandgap and facilitating efficient separation of photogenerated charge carriers. The presence of anatase and brookite phases further reduces electron-hole recombination, significantly improving performance under visible light.

Potential Applications

• Water treatment via photodegradation of organic pollutants
• Solar-driven hydrogen production for clean energy

Benefits/Advantages

• Operates efficiently under visible light, eliminating the need for UV sources
• Self-supported design enhances durability and recyclability
• High surface area and porous structure promote catalytic activity
• Superior performance compared to traditional TiO2 nanoparticles and traditional solar cells
• Safe for use in the environment – no toxic byproducts
• Low cost