Studies into the Yb-doping effects on photoelectrochemical properties of WO3 photocatalysts
| Autor: | He-Kuan Luo, Chin Seng Chua, Siao Li Liew, Gomathy Sandhya Subramanian |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Photocurrent
Materials science Dopant General Chemical Engineering Doping Sintering 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Electrochemistry 01 natural sciences 0104 chemical sciences symbols.namesake Ultrafast laser spectroscopy symbols 0210 nano-technology Raman spectroscopy |
| Zdroj: | RSC Advances. 6:19452-19458 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c5ra26254b |
| Popis: | Yb-doped WO3 photocatalysts were prepared by co-sputtering Yb and WO3 on FTO glass and then sintering at elevated temperatures in air. At sintering temperatures between 450 and 550 °C, the photocurrent densities of Yb-doped WO3 photocatalysts were higher and more stable than those of pristine WO3 photocatalysts. The Yb-doping effects on the photoelectrochemical properties were investigated using Raman, transient absorption and electrochemical impedance spectroscopies. Compared to pristine WO3 photocatalysts, Yb-doped photocatalysts sintered at up to 550 °C consist of sub-stoichiometric WO3−x due to the substitution of W6+ cations with Yb3+ dopants, displaying shorter electron–hole recombination times and higher levels of donor densities. |
| Databáze: | OpenAIRE |
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