Single-crystalline Si nanowires are fabricated by Ag-assisted chemical etching at room temperature. On the basis of efficient light harvesting of Si nanowires, the novel photocatalysts are prepared by mixing the as-prepared Si nanowires with TiO 2 microparticles of various weight ratios. The dye degradation of these combined photocatalysts is above two times more efficient than conventionally used TiO 2 under 580nm light irradiation. We have also validated that the involving photodegradation agrees well with the first-order kinetic model. These photocatalysts possess broad-band absorption with extended edge up to 700nm, facilitating high photocatalytic activity for the urgent treatment of water pollutants.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Acoustics and Ultrasonics
- Surfaces, Coatings and Films