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Strategic Surface Modification for the Enhanced Photocatalyic Activity: Synergistic Promotion for Energy Utilization in TiO.sub.2-Cu.sub.2O-Au
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Strategic Surface Modification for the Enhanced Photocatalyic Activity: Synergistic Promotion for Energy Utilization in TiO.sub.2-Cu.sub.2O-Au
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Journal Article
Strategic Surface Modification for the Enhanced Photocatalyic Activity: Synergistic Promotion for Energy Utilization in TiO.sub.2-Cu.sub.2O-Au
2021
Overview
A ternary nanocomposite structure of TiO.sub.2-Cu.sub.2O-Au was successfully synthesized by the hydrothermal method to explore the light trapping mechanism of Au nanoparticles in photoelectrochemical water splitting. The photocurrent curve of TiO.sub.2-Cu.sub.2O-Au quickly arrived at saturation and increased to 1044 [mu]A/cm.sup.2 at 1.23 V (vs RHE), which was 10.4 times higher than the TiO.sub.2 only. This attributed to the positive synergistic effect of Au plasmon and TiO.sub.2-Cu.sub.2O heterojunction, in which Au act as a light absorber extended the optical path while Cu.sub.2O promoted the separation of photogenerated electron-hole pairs in semiconductors. These intriguing results expanded the comprehensive understanding of the plasmon-assisted photocatalyic reactions and gave a better manipulation in the design of efficient artificial photosynthesis systems.
Publisher
Springer
Subject
