| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1609142 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
Ordered channeled and porous TiO2 and Ag modified silicon nanowires (TiO2/Ag/SiNWs) heterostructured nanocrystals arrays are synthesized by a two-step method based on an electrochemical etching procedure and a sol-gel process. The morphology and photoelectrochemical properties of the TiO2/Ag/SiNWs are studied. The TiO2/Ag/SiNWs photocatalysts possess ordered channels and a porous structure with large specific surface area. UV-visible diffuse reflectance spectroscopy and ultraviolet Raman scattering demonstrate that the incorporated Ag significantly enhances light absorption by the TiO2/SiNWs in the visible spectral range and improves the separation of photo-induced charge carriers in the TiO2/SiNWs. The photoelectrochemical properties of the TiO2/Ag/SiNWs are investigated by monitoring the degradation of pnitrophenol (PNP) and Ag enhances PNP photodegradation under UV-vis irradiation due to the Ag-TiO2 heterojunctions and surface texture. The photoelectrochemical properties of TiO2/Ag/SiNWs have promising applications in photoelectrochemical solar cells and other light-harvesting devices.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bairui Tao, Fengjuan Miao, Paul K. Chu,