MoS2 quantum dots interspersed WO3 nanoplatelet arrays with enhanced photoelectrochemical activity
| Autor: | Yong-Hao Xiao, Wei-De Zhang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photocurrent
Nanostructure Materials science business.industry General Chemical Engineering Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Tungsten trioxide 0104 chemical sciences chemistry.chemical_compound chemistry Quantum dot Electrode Optoelectronics 0210 nano-technology business Molybdenum dioxide Visible spectrum |
| Zdroj: | Electrochimica Acta. 252:416-423 |
| ISSN: | 0013-4686 |
| DOI: | 10.1016/j.electacta.2017.09.011 |
| Popis: | Facing the issues for ineffective visible light utilization, insufficient separation of photogenerated electron-hole pairs of WO 3 photoanode, herein, ultrasmall MoS 2 quantum dots (QDs) are exploited as surface sensitizers to boost the photoelectrochemical (PEC) properties of MoS 2 /WO 3 . The MoS 2 /WO 3 photoanode is prepared by decorating 2D WO 3 nanoplatelet arrays with ultra-small MoS 2 QDs via a facile and effective assembly method. The interspersing of MoS 2 QDs, not only broadens the photoabsorption region, but also provides more active sites for the surface reactions and enhances charge separation of the photogenerated electron-hole pairs, leading to a 2.13-fold enhancement in photocurrent density at 1.0 V vs. Ag/AgCl (1.23 V vs. RHE). MoS 2 /WO 3 photoanodes hold potentialities for the straightforward building of molecular level devices for PEC production. |
| Databáze: | OpenAIRE |
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