Add time:08/10/2019         Source:sciencedirect.com

In this study, homogeneous alloy AuPt nanoparticles were successfully immobilized on ultrathin TiO2 nanorods via a facile photodeposition technique. The AuPt/TiO2 hybrid exhibited high photocatalytic activity and stability during the selective photosynthesis of benzaldehyde from benzyl alcohol under visible light. The optimal performance was obtained with the Au1Pt1/TiO2 sample, which had a benzyl alcohol conversion rate of 65.3%. The engineered TiO2 nanorods (304 m2/g) can be employed as a stabilizing matrix and an excellent dispersant for noble metal particles. Moreover, the formation of the alloy structure substantially enhances the photoinduced carrier separation efficiency compared with loading Au or Pt alone on TiO2. The bimetallic nanoparticles exhibited the properties related to the individual metals, as well as new properties due to synergistic effects of the electron-accumulating function of Pt and the surface plasmon resonance of Au.

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