Enhancing photoelectrochemical performance of TiO2 nanotube arrays by CdS and Bi2S3 co-sensitization
| Autor: | J.L. Qiao, Q.Y. Wang, J.X. Ye, Y.K. Xiao |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Photocurrent
Scanning electron microscope Anodizing General Chemical Engineering General Physics and Astronomy Nanoparticle Nanotechnology 02 engineering and technology General Chemistry Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering 0210 nano-technology Absorption (electromagnetic radiation) Ethylene glycol Visible spectrum |
| Zdroj: | Journal of Photochemistry and Photobiology A: Chemistry. :34-39 |
| ISSN: | 1010-6030 |
| DOI: | 10.1016/j.jphotochem.2015.12.020 |
| Popis: | TiO2 nanotube arrays (TiO2 NTs) were prepared by a two-step anodization of titanium foils in ethylene glycol electrolyte. Then, CdS and Bi2S3 nanoparticles were deposited on TiO2 NTs by an one-pot solvothermal method. The investigations of X-ray diffraction and scanning electron microscopy indicated that CdS and Bi2S3 nanoparticles grew uniformly on the surface of TiO2 NTs. UV–vis absorption and photoelectrochemical measurements proved that the CdS and Bi2S3 co-sensitization significantly improved the visible light absorption, photocurrent response and photoelectrocatalytic removal of RhB and Cr(VI). In addition, the influence of Cd2+/Bi3+ concentration ratios on the photoelectrochemical performance of TiO2 NTs-CdS/Bi2S3 was investigated in detail. The TiO2 NTs-CdS/Bi2S3 (1:1) showed an optimal photoelectrochemical activity which could be attributed to the improvement of visible light response and charge separation derived from the coupling effect of CdS/Bi2S3 nanoparticles. |
| Databáze: | OpenAIRE |
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